I’m writing a Bash script. I need the current working directory to always be the directory that the script is located in. The default behavior is that the current working directory in the script is that of the shell from which I run it, but I do not want this behavior. 13 s 13 #!/bin/bash … Read more
How can I determine the name of the Bash script file inside the script itself? Like if my script is in file runme.sh, then how would I make it to display “You are running runme.sh” message without hardcoding that? 24 s 24 me=`basename “$0″` For reading through a symlink1, which is usually not what you … Read more
This question already has answers here: How to compare strings in Bash (11 answers) Closed 3 years ago. I’m trying to get an if statement to work in Bash (using Ubuntu): #!/bin/bash s1=”hi” s2=”hi” if [“$s1” == “$s2”] then echo match fi I’ve tried various forms of the if statement, using [[“$s1” == “$s2”]], with … Read more
I needed to write a script to enter multi-line input to a program (psql). After a bit of googling, I found the following syntax works: cat << EOF | psql —params BEGIN; `pg_dump —-something` update table …. statement …; END; EOF This correctly constructs the multi-line string (from BEGIN; to END;, inclusive) and pipes it … Read more
I’m writing a script in Bash to test some code. However, it seems silly to run the tests if compiling the code fails in the first place, in which case I’ll just abort the tests. Is there a way I can do this without wrapping the entire script inside of a while loop and using … Read more
How do I run a PowerShell script? I have a script named myscript.ps1 I have all the necessary frameworks installed I set that execution policy thing I have followed the instructions on this MSDN help page and am trying to run it like so: powershell.exe ‘C:\my_path\yada_yada\run_import_script.ps1’ (with or without –noexit) which returns exactly nothing, except … Read more
I tried to declare a Boolean variable in a shell script using the following syntax: variable=$false variable=$true Is this correct? Also, if I wanted to update that variable would I use the same syntax? Finally, is the following syntax for using Boolean variables as expressions correct? if [ $variable ] if [ !$variable ] 2 … Read more
I want to pause input in a shell script, and prompt the user for choices. The standard Yes, No, or Cancel type question. How do I accomplish this in a typical bash prompt? 3 35
Say, I have a script that gets called with this line: ./myscript -vfd ./foo/bar/someFile -o /fizz/someOtherFile or this one: ./myscript -v -f -d -o /fizz/someOtherFile ./foo/bar/someFile What’s the accepted way of parsing this such that in each case (or some combination of the two) $v, $f, and $d will all be set to true and … Read more
I am writing a shell script to run under the KornShell (ksh) on AIX. I would like to use the mkdir command to create a directory. But the directory may already exist, in which case I do not want to do anything. So I want to either test to see that the directory does not … Read more
