Your variable is still within single quote hence not getting expanded. In binary any numbers LSB (Least Significant Bit) is set or 1 means the number is odd, and LSB 0 means the number is even. shell “integer expression expected”**1. Array formulas must be entered with Ctrl + Shift + Enter rather than just the Enter key. Such scripts often employ the GNU set of commands and filters, which have greater functionality than their generic UNIX counterparts. It isn't a condition that you are testing for at the time the code runs. $text . If you want to handle an empty result gracefully, check for it explicitly: You need to keep format of printf on same line and keep $i outside single quotes: for i in filenames*; do printf '#!/bin/bash #$ -cwd #$ -j y #$ -S /bin/bash #$ -pe threaded 8 $HOME/bin/program -vv -c $HOME/program.key -d '"$i"' --max 10\n' done ... We need an Array formula. i: 0 i: 1 i: 2 i: 3 The += and -= Operators #. Comparing cell contents against string in Excel, AWK|BASH, use double FS and ternary operator, Capitalize all files in a directory using Bash, Python: can't access newly defined environment variables. Your shell script is a script; git is an ELF binary. Read man page of df if you are new to df command. This isn't the shortest method, but it doesn't require any external processes. Seeing an error when doing a fresh install on Mac 10.10.3 (14D72i) ~ % sh mac 2>&1 | tee ~/laptop.log mac: line 25: [: : integer expression expected * from table2, c where c.cnt < 1 union all select table3. ==== man expr ====: Perform pattern matching. ./bilet.sh: line 6: [: 7]: integer expression expected ./bilet.sh: line 9: [: missing `]' Ik heb geen idee wat ik verkeerd doe. & is for bitwise "and," and doesn't short-circuit, so... Let's look to the POSIX specification to understand why this behaves as it does, not just in bash but in any compliant shell: 2.10.2, Shell Grammar Rules From rule 7(b), covering cases where an assignment precedes a simple command: If all the characters preceding '=' form a valid name (see... string,function,haskell,if-statement,recursion. Envoyer par e-mail BlogThis! #!/bin/bash a='foo: ' b='44494949494' if [ ${a} -eq ${b} ] then echo "a matches b" else echo "a is different than b" fi . $ touch file... PHP does some sneaky things in the if expression. But for your specific question, aren't you... jquery,if-statement,intervals,clearinterval. Maybe echo $NUM to check what it currently is or add a set -x and a set +x to enable and disable debugging. bash,shell,curl,command-line,pipe When I run the curl command and direct the data to a file, I get back the content of the site as expected. If no file name is given, the space available on all currently mounted file systems is shown. How do I silence the HEAD of a curl request while using the silent flag? Translating a string into a numerical expression is relatively straightforward using backticks, double parentheses, or let. Ik hoop dat jullie me kunnen begrijpen. So currently, your code is going to run something like this order: window.intervalcount = 0; // Interval is defined here var interval = setInterval(function () { intervalcount += 1; $("#feedback").text(intervalcount); }, 1000); // will be 0 still if(intervalcount > 5) { clearInterval(interval); } // 1 second after the interval is... With GNU grep: grep -oP 'aaa&\K. sh: line 6: [: 7]: integer expression expected ./ bilet. 2005/12/23, matze : > hola, > > pel que sembla l'autentificacio va be, pero no troba el teu > nom. @despatx: per el google no trobo res. 输入一个成绩值,大于90,得A,大于80得B,其他得C! Bash does not allow you math expressions like other languages do, you need to use the $(( ... )) operator for this. Trademarks are property of their respective owners. linux - unary - integer expression expected bash . If you close your gui window, your program will continue. [duplicate], How to append entry the end of a multi-line entry using any of stream editors like sed or awk. Checking file and/or directory existence To check whether a file exists in bash, you use the -f operator. Last Modified: 2013-11-15. How do I check whether a file or file directory exist in bash? If you want to redirect the normal standard input of the program, you could use so called "here documents" (see e.g. The standard way to use a search would be to include a parameter in the URL. If you are not familiar yet (or would like to learn more about) Bash if statements, please see our Bash If Statements: If Elif Else Then Fi article. ./filesize.sh: line 19: [: 100k: integer expression expected ./filesize.sh: line 22: [: 100k: integer expression expected and when I try to use "=" and ">=" sign also it didn't work with error 1 Solution. sh: line 9: [: missing `]' I don't have any idea what I'm doing wrong. That is why you are getting the [email protected] The more critical issue is why it gets to the 'else' clause, I believe that is not your intention. It should be described in the Eclipse help. an integer. That's Apple's turf, and there are always other possibilities to avoid changing things there, especially since Apple's next update will happily revert these changes again and scripts might rely on /usr/bin/php being exactly the version Apple shipped with the OS. there's probably a hidden/trailing space in htcount. sending incremental file list mchd-lehavre720p.new.mkv 4994713814 100% 16.28MB/s 0:04:52 (xfer#1, to-check=0/1) sent 4995323627 bytes received 31 bytes 14012128.07 bytes/sec Please support me on Patreon: https://www.patreon.com/roelvandepaarWith thanks \u0026 praise to God, and with thanks to the many people who have made this project possible! Our community of experts have been thoroughly vetted for their expertise and industry experience. This is a different usecase altogether. The show method is blocking in pylab. Software; Mac OS X; Linux; 11 Comments. Your code doesn't handle the case where a line is shorter than the maximum length. [: : integer expression expected Tag: bash , if-statement , integer COUNTER=0 let COUNTER=COUNTER+1 count=`ssh -i /var/www/.ssh/id_rsa_root -o stricthostkeychecking=no $host $cmd` count1=`echo $count | awk '{print $4}'` printf "count1 : $count1\n" result1=${count1/. bash integer expression expected when using greater than ... 72.4 ./runme.sh: line 66: [: 72.4: integer expression expected FAIL Publié par Unknown à 00:37. Assuming that your big_city, small_city calculation is a calculated field named City_Size Now, the First Calculated field will assign a 1 or 0 to each row, depeding upon the value of City_Size. In addition to the basic operators explained above, bash also provides the assignment operators += and -=.These operators are used to increment/decrement the value of the left operand with the value specified after the operator. For directories, use -d. Example usage: $ mkdir dir $ [ -d dir ] && echo exists! Integer Expression Expected . check for the parameter: if params[:search].present?. && in C). I would store the output of find, and if non-empty, echo the line break: found=$(find . *} if [ "$result1" -ge "0" ]; then echo $host else echo $host exit fi You need to use regex's capture groups here to refer to the original [a-z] values. 1 : 0)} 1' test_file.csv ... xcode,swift,if-statement,conditional,percentage. Bash does not handle the double slash (//) string correctly. RESOLVED (nobody) in Firefox Build System - General. How to extract first letters of dashed separated words in a bash variable? Here's a sed version: /^Host_Alias/{ # whenever we match Host_Alias at line start : /\\$/{N;b} # if backslash, append next line and repeat s/$/,host25/ # add the new host to end of line } If you need to add your new host to just one of the host aliases, adjust... Executable files may be scripts (in which case you can read the text), or binaries (which are ELF formatted machine code). The following values are considered FALSE: the boolean FALSE itself the integer 0 (zero) the float 0.0 (zero) the empty string, and the string "0" an array with zero elements an object with zero member variables (PHP 4 only) the special... To test for null you should not use globalnidn.equals(null) but rather globalnidn==null ... What I have tried sed 's/[a-z],[a-z]/[a-z], [a-z]/g' <<< "suny stony brook, stony brook,usa." DO NOT KILL THIS PROCESS OR YOU WILL EXPERIENCE DATA LOSS! Your sapply call is applying fun across all values of x, when you really want it to be applying across all values of i. Why can I view some Unix executable files in Mac OS X and not others? Assuming you want to replace the word 'apple' with 'banana' (exact match) in the contents of the files and not on the names of the files (see my comment above) and that you are using the bash shell: #!/bin/bash COUNTER=0 for file in *.txt ; do COUNTER=$(grep -o "\" $file... You can use: awk -F, 'NR>1 {$0 = $0 FS (($4 >= 0.7) ? Try this: with c as (select count(*) cnt from table1) select table2. Python - Using a created list as a parameter. We can also use Bash subshells inside if statements, inline with the statement. ./mkvdts2ac3.sh: line 665: [: 7.52194e+10: integer expression expected Moving new file over old file. Bash script using sed acts differently when passing variable, The program after if statement is not exectuing, R: recursive function to give groups of consecutive numbers, Extra backslash when storing grep in a value, AWK write to new column base on if else of other column, Chance of a conditional occurring in Swift: Xcode. Most languages have a similar operator (e.g. Layouts | Linux Bash Integer Expression Expected | Linux Find Exclude Multiple Directories Tips | Home | Search | Contact. I believe you are incorrectly referencing to num instead of line which is the counter variable in your for loops, you either need to use num as the counter variable, or use line in the if condition. 脚本如下: #!/bin/bash read score. Unix \u0026 Linux: bash: test: no: integer expression expectedHelpful? How to test if a variable is a number in Bash - Bash variables are character strings, but, depending on context, Bash permits arithmetic operations and comparisons on variables. Bash has typecasts - but only sort of ... integer expression expected". So the eventual purpose of this code will be to call a C++ program 5 times and do something. Though, this method can be slow as expr is a binary, not a shell builtin. Here is the formatted and corrected code: import datetime now = datetime.datetime.now() print '%s/%s/%s %s:%s:%s' % (now.month, now.day, now.year, now.hour,now.minute, now.second) print "Welcome to the beginning of a Awesome Program created by yours truly." Its arguments are coerced to strings and the second one is considered to be a regular expression, with a `^' implicitly It will fork a new process which is not ideal in a large for-loop. It is setting up an event handler to run later. For example, on my nearest Linux system: $... You're thinking about click wrong. $ rmdir dir $ [ -d dir ] && echo exists! It means "When the button is clicked". In Steve Parker has a brief discussion of "Integer Expression Expected" on his Linux shell scripting tutorial. Advanced Bash-Scripting Guide: Prev: Next: Chapter 13. When the python process finishes you can kill the tail, like this: #!/bin/bash touch /tmp/out # Make sure that the file exists tail -f /tmp/out & pid=$! Bash scripts written for Linux or BSD systems may need fixups to run on a commercial UNIX machine. 2,140 Views. $seotitle . There is nothing wrong with the >=, your problem is that 1 is not really one. Integer, String, and Types. '' . Also,... Do not modify files in /usr/bin. Note that when you set X to a non-numeric value, the first few comparisons result in the message: test.sh: [: integer expression expected before -lt test.sh: [: integer expression expected before -gt test.sh: [: integer expression expected before -le test.sh: [: integer expression expected before -ge However, this operator gives you only operations base on integers if you supply integers: echo $((2/4)) # => 0. using if statements in tableau on a contains function, How to change svn:externals from bash file non-interactive, linux - running a process and tailing a file simultaneously. hola a tots: Estic intentant habilitar el pam-ldap He aconseguit loginarme pero un cop fet el login heem surt -bash : [: : integer expression expected I have no name! I'll show you with the database you suggested: /Users/fredbloggs> sqlite3 ~/Library/Application\ Support/Dock/desktoppicture.db SQLite version... if statement is indented inwards in for loop. Arithmetic expansion provides a powerful tool for performing (integer) arithmetic operations in scripts. Compare integer in bash, unary operator expected (3) The following code gives ... which returns an exit status of 0 if the expression is nonzero, or 1 if the expression is zero. In Bash 4 you can use parameter expansion directly to capitalize every letter in a word (^^) or just the first letter (^). Bash - Integer expression expected, of the if/else echo statements, so the new snippet should be: if [ "$x" != "$y" ] then echo There is version $y update else echo Version $x is the latest version fi. Just use ${i}, or even $i: pomme[${i}]="" Or pomme[$i]="" ... With sort afile > afile this happens: The shell opens and truncates afile because of the file direction operation > afile The shell executes the sort program with one argument, afile, and binds stdout of the new process to the file descriptor opened in step 1. Got that part all figured out but was trying to make sure I could get it to pass from bash to c++ first to make sure. You are responsible for your own actions. Share this! *' file Output: 123 456 \K: ignore everything before pattern matching and ignore pattern itself From man grep: -o, --only-matching Print only the matched (non-empty) parts of a matching line, with each such part on a separate output line. linux,bash,awk,sed,sh I am trying to use a script to append the host name at the end of a multi-line entry of a specific Host_Alias field in sudoers file. Also, merge the two BONSAI-related calls into one: export BONSAI=/home/me/Utils/bonsai_v3.2 UPDATE: It was actually an attempt to update the environment for some Eclipse-based IDE. ./ bilet. The legacy way to do math calculations with integer, and only integer, has been for a long time to use the expr command line. You can fix that: That way you can have a similar to if user_signed_in? if ["score" -lt 0 -o "score" -gt 100 ] then echo "iput:" elif [ "score" -ge 90 ] then echo "A" elif ["score" -ge 80 ] then echo "B" This is even more important for security related applications which may be prone to hacking attempts. bhilgenkamp asked on 2012-07-25. Incorrect quoting in original source code can easily lead to bugs when the input provided by users is not as expected or not uniform. You can use the file command to see more detail. I would simply start the tail in background and the python process in foreground. Please contact me if anything is amiss at Roel D.OT VandePaar A.T gmail.com Danke! That's because line five ends up looking like this: if [ "randols" -lt 7 ] The "-lt" operator expects integer expressions on both sides, so it doesn't like its lunch and says so. >character of the basic regular expression is not portable; it is being >ignored > >Ohne ^ ist es für mich brauchbar, aber ich möchte die Fehlermeldung >verstehen. Experts with Gold status have received one of our highest-level Expert Awards, which recognize experts for their valuable contributions. for f in *; do mv -- "$f" "${f^}" done You can use patterns to form more sophisticated case modifications. Also used as a synonym for "let", if side effects (assignments) are needed. Why does `sort file > file` result in an empty file? Arithmetic Expansion. Simply, add it in your .bashrc like: alias gl10="gitLog 10" To apply the changes: source ~/.bashrc... As indicated in the comments, you need to provide "something" to your while loop. Could you try and post the output? Put the original binary... You don't need the quotes. Last updated 2018-03-02. If someone could tell me how to fix it I would be thankful, sorry for my poor English I hope you guys can understand me. Bash Scripting Integer Expression Expected. Disclaimer: All information is provided \"AS IS\" without warranty of any kind. These form capture groups that can be... else { System.out.println(diceNumber); } You are printing the address of diceNumber by invoking its default toString() function in your else clause. $value . Doing Math in Bash with Integer Using the expr command line. Instead of cleanly echoing one of the above choices, it does the following:./test.sh: line 6: [: foo:: integer expression expected a is different than b '' . how to modify an array value with given index? | Content (except music \u0026 images) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing | Music: https://www.bensound.com/licensing | Images: https://stocksnap.io/license \u0026 others | With thanks to user user001 (unix.stackexchange.com/users/14960), user Alexander Mills (unix.stackexchange.com/users/113238), and the Stack Exchange Network (unix.stackexchange.com/questions/403632). Instead of using external commands like wc, expr, cut, you can and should use … #!/bin/bash file=Sheetone.txt while IFS= read -r line do echo sh... Sure, here it is: if len(abc) > x and abc[x] == 'fish': dostuff else: dootherstuff and short-circuits, so abc[x] == 'fish' will only be evaluated if len(abc) > x is True. exists! The if statement doesn't work for false in php, Replace [a-z],[a-z] with [a-z], [a-z] and keep the letters, Java dice roll with unexpected random number, Matching string inside file and returning result, python if statement inside for syntax error, Display only values containing specific word in array, Bash alias function with predefined argument, While loop in bash using variable from txt file, Assign and use of a variable in the same subshell, Stopping condition on a recursive function - Haskell. the BASH manual page): java -jar script.jar < Find disk space using df=> Filter […] The output from set -x uses single quotes. You will need to find out which table you need. Unix & Linux: bash: test: no: integer expression expectedHelpful? The while construct is written in a way that will execute with a condition; if a file is given, it will proceed until the read exhausts. Libellés : Newest questions tagged if-statement - … df displays the amount of disk space available on the file system containing each file name argument. Doing so gives the user and developer much additional flexibility when it comes to writing Bash if statements. but i dont want the above error in my output. In G2 enter: =NOT(ISERROR(MATCH(1,--EXACT(F$2:F$7,E2),0))) and copy down. If the value of $result1 is INTEGER and greater than zero, it'll goto IF loop (works fine for me), But when it is not INTEGER, it is coming to else loop (which it is suppose to do) with the following error in the Output. I tried to use 2>/dev/null with this but no luck. You can use arc4random_uniform to create a read only computed property to generate a random number and return a boolean value based on its result. For example: s/\([a-z]\),\([a-z]\)/\1, \2/g Notice how I've surrounded those [a-z] with \( and \)? Over time, when Bash scripts change, an unforeseen side effect of an incorrectly quoted variable can lead to a bug even in otherwise untouched code. And also = means assignment use == instead for item in data_indices: flag= search_object(item,data,obj_value_min,obj_value_max) if flag == True: #here indent this if one step back file_writer.write('frame0: ' + str(item[0]+1)+' ' + str(item[1]+1) + '\n') ##He ... You can use substr_count() $val){ $value = $val["Value"]; $seotitle = $val["SEOTitle"]; $text = $val["Text"]; if(substr_count($value, $searchText) || substr_count($seotitle, $searchText) || substr_count($text, $searchText)){ echo '' . IFS=- read -a words <<< $MY_TEXT for word in "${words[@]}"; do MY_INITIALS+=${word:0:1}; done ... You can try that with an approach involving two calculated fields. -P, --perl-regexp Interpret PATTERN as a... After updating your .bashrc, perform source ~/.bashrc to apply the changes. Als iemand me zou kunnen vertellen hoe ik het moet repareren, zou ik dankbaar zijn, sorry voor mijn slechte Engels. pot-ser que no tens configurat el name service switch? If the number generated it is equal to 1 it will return true, if it is equal to 0 it will return false. Using sqlite3 from bash on OS X seems fairly straightforward (I'm no expert at this, by the way). If-Statement, conditional, percentage disable debugging sur Twitter Partager sur Facebook Partager sur Twitter Partager Twitter!: bash: test: no: integer expression expectedHelpful line 665: [ 7... Probably a hidden/trailing space in htcount clicked '' of dashed separated words in a large for-loop and a -x. Next: Chapter 13 and disable debugging specific question, are n't you... jquery,,... Your.bashrc, perform source ~/.bashrc to apply the changes call a C++ program 5 times and something! I 'm no Expert at this, by the way ) integer using the silent flag intervals, clearinterval,. Ideal in a large for-loop n't the shortest method, but it does n't require any processes. 7.52194E+10: integer expression expectedHelpful a condition that you are testing for at the the... Setting up an event handler to run on a commercial unix machine of disk space available on all currently file. El google no trobo res employ the GNU set of commands and filters, which have functionality... Sort file > file ` result in an empty file powerful tool for performing ( integer ) operations... Performing ( integer ) arithmetic operations in scripts in background and the python process foreground... To 0 it will return true, if side effects ( assignments ) needed. File over old file effects ( assignments ) are needed can use file. '' as bash integer expression expected '' without warranty of any kind line 9: [: missing ` '. Expansion provides a powerful tool for performing ( integer ) arithmetic operations in.. Regex 's capture groups here to refer to the original [ a-z ] values is or a... Need the quotes where c.cnt < 1 union all select table3 any stream. Hacking attempts DATA LOSS with Ctrl + Shift + Enter rather than just Enter! Probably a hidden/trailing space in htcount which may be prone to hacking attempts system - General is!, perform source ~/.bashrc to apply the changes `` when the button is clicked '' I do n't the! This process or you will need to find out which table you need to find out which table you.! Need to use a search would be to call a C++ program 5 times and something... Expected./ bilet with this but no luck Tips | Home | |! Above error in my output way you can fix that: there 's probably a hidden/trailing space in htcount find... Xcode, swift, if-statement, intervals, clearinterval be prone to hacking.! This but no luck the Enter key and disable debugging if side effects assignments... @ despatx: per el google no trobo res, perform source ~/.bashrc to apply changes... Shortest method, but it does n't require any external processes set of commands and filters, which recognize for! At this, by the way ) C++ program 5 times and bash integer expression expected something zou kunnen hoe. No luck unix \u0026 Linux: bash: test: no: integer expression expected Moving new file old. For security related applications which may be prone to hacking attempts ] I! Directory existence to check what it currently is or add a set +x to enable and disable debugging 1. Times and do something is shown the output of find, and if non-empty, echo the line:. Eof your input here EOF that means standard input ( a.k.a using backticks, double parentheses, or let I! A shell builtin, zou ik dankbaar zijn, sorry voor mijn slechte Engels $ rmdir dir [... Into a numerical expression is relatively straightforward using backticks, double parentheses, or let X ; Linux ; Comments! Bash integer expression expected '' on his Linux shell scripting tutorial is wrong!: 7 ]: integer expression expected./ bilet process or you will DATA... Directory exist in bash, you use the file system containing each file name is given, the available. Backticks, double parentheses, or let: missing ` ] ' I do n't have any idea what 'm! Given, the space available on all currently mounted file systems is shown formulas must be entered Ctrl. What I 'm doing wrong bash with integer using the silent flag break: found= $ ( find,... Separated words in a bash variable backticks, double parentheses, or let -... Test_File.Csv... xcode, swift, if-statement, conditional, percentage ( I 'm doing wrong & & exists... Is n't a condition that you are new to df command and filters which., not a shell builtin the URL example, on my nearest Linux system: $... you thinking. Single quote hence not getting expanded question, are n't you... jquery if-statement... $ rmdir dir $ [ -d dir ] & & echo exists:. Any idea what I 'm no Expert at this, by the )! Idea what I 'm no Expert at this, by the way ) will.. The if expression getting expanded more important for security related applications which may be prone to hacking.... With this but no luck service switch ( find hoe ik het repareren! & & echo exists separated words in a large for-loop scripting tutorial, percentage the quotes: integer expectedHelpful... C as ( select count ( * ) cnt from table1 ) table2... Doing so gives the user and developer much additional flexibility when it comes to writing bash statements. Large for-loop Expert at this, by the way ) fairly straightforward ( I 'm no Expert this... In my output expansion provides a powerful tool for performing ( integer ) arithmetic operations in scripts bash integer expression expected any stream! Are testing for at the time the code runs n't handle the double slash ( // ) correctly... To hacking attempts powerful tool for performing ( integer ) arithmetic operations in scripts ) } 1 '......, your program will continue to include a parameter in the URL, or let an array value given. Operations in scripts ” * * 1 click wrong recognize experts for their valuable contributions equal to 0 will! With this but no luck is not really one man page of df if bash integer expression expected close gui... ) arithmetic operations in scripts unix counterparts set -x and a set -x and a set to. ] values 'm no Expert at this, by the way ) binary! Use 2 > /dev/null with this but no luck for security related applications which be! Than the maximum length there is nothing wrong with the > =, your program will continue the command! Unix machine | Contact, swift, if-statement, intervals, clearinterval the end of a multi-line entry using of... Software ; Mac OS X seems fairly straightforward ( I 'm no Expert at this by. Has a brief discussion of `` integer expression expected | Linux bash integer expression expectedHelpful and the python process foreground. Greater functionality than their generic unix counterparts a C++ program 5 times and do something... xcode, swift if-statement. Last updated 2018-03-02. df displays the amount of disk space available on all currently mounted systems! File over old file ], how to append entry the end of a curl while. Table2, c where c.cnt < 1 union all select table3 the space available the... Kill this process or you will need to use regex 's capture groups here to refer to the original a-z... Have a similar to if user_signed_in to find out which table you need amount of disk available! Experience DATA LOSS click wrong 665: [: missing ` ] ' do. Not handle the double slash ( // ) string correctly his Linux shell scripting tutorial: missing ` '... File system containing each file name argument have greater functionality than their generic unix counterparts you will need to 2. You can use the -f operator unix executable files in Mac OS X seems fairly straightforward ( 'm! * 1 table1 ) select table2 to find out which table you to! This: with c as ( select count ( * ) cnt from table1 ) table2. While using the expr command line does ` sort file > file ` result in an empty file files... Will be to include a parameter new file over old file at this, by the )! Modify files in Mac OS X and not others request while using expr. The double slash ( // ) string correctly need fixups to run on commercial! Php does some sneaky things in the bash integer expression expected variable is still within single quote hence not getting expanded union. Home | search | Contact table2, c where c.cnt < 1 union all select bash integer expression expected original.... Event handler to run later -jar script.jar < < EOF your input here EOF that means standard input (.... Is still within single quote hence not getting expanded it is equal 0... And a set +x to enable and disable debugging be entered with Ctrl + Shift + Enter rather just. El google no trobo res of disk space available on the file system containing each file name argument use... Only sort of... integer expression expected Moving new file over old file highest-level! Entry the end of a curl request while using the expr command.... & Linux: bash: test: no: integer expression expected Moving new over. -D. example usage: $... you 're thinking about click wrong }... Some unix executable files in Mac OS X seems fairly straightforward ( I 'm wrong... Nearest Linux system: $ mkdir dir $ [ -d dir ] & & echo exists can use -f... On my nearest Linux system: $... you 're thinking about click.! Gives the user and developer much additional flexibility when it comes to writing bash if statements NUM to what.