Linked Questions

If you've been following unix.stackexchange.com for a while, you should hopefully know by now that leaving a variable unquoted in list context (as in echo $var) in Bourne/POSIX shells (zsh being the ...

I'm trying to escape the space char for a path in Bash, but neither using a backslash or quotes works. .sh script: ROOT="/home/hogar/Documents/files/" FILE=${ROOT}"bdd.encrypted" DESTINATION="/home/...

I've read that you need double quotes for expanding variables, e.g. if [ -n "$test" ]; then echo '$test ok'; else echo '$test null'; fi will work as expected, while if [ -n $test ]; then echo '$test ...

Answering this question caused me to ask another question: I thought the following scripts do the same thing and the second one should be much faster, because the first one uses cat that needs to open ...

I have a problem with my script. Prelude Firstly, I have a list, 100 lines-file like that: 100;TEST ONE 101;TEST TWO ... 200;TEST HUNDRED Each line have 2 arguments. For example, first line's ...

I looked around for an answer to the question "Can I use an array as an environment variable and then call it from a Bash shell script" and came to the conclusion that it was not "officially" ...

This came out of one of my comments to this question regarding the use of bc in shell scripting. bc puts line breaks in large numbers, e.g.: > num=$(echo 6^6^3 | bc) > echo $num ...

I have seen several times the use of "list context" and "string context". I know and understand the use of such descriptions in perl. They apply to $ and @. However, when used in shell ...

I need to make a shell script called chExt.sh. that accepts a file extension and then multiple files. It then needs to change the file extensions or state that the file does not exist. ./chExt.sh ...

I am trying to use cmake and OpenGL to learn computer graphics, and the tutorial included a run.sh file that is supposed to compile/build the cpp programs. Here is the code: #!/bin/bash #calls cd ...

I'm trying to figure out how to use the ${parameter%word} expansion with $@ and $*. It started by trying to make a script to combine pdfs using ghostscript, but I ran into some weird behavior with ...

I need to write a bash script which will check if it is run as root user ask for the user name check if user exists add new user with password ask for the group name check if this group exists add the ...

For example, I want to find all symlinks that reference to particular binary in all directories that belong to system $PATH. This can be successfully achieved with manual specification of all ...

This works beautifully in BASH: $ where=/sys/class/backlight/* $ echo $where /sys/class/backlight/intel_backlight However when put in the POSIX script with /bin/sh as an interpreter, this doesn't ...

my code: execInPath() { prev_dir=${PWD##*/} cd $1 shift res=$($@) cd prev_dir echo res } alias path=execInPath $ path ~ ls gives: bash: cd: prev_dir: No such file or directory (and the files in my ...