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15 questions linked to/from Using shell variables for command options
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2 votes
2 answers
48k views

I am calling a bash script that has a number of flags in the following manner: /home/username/myscript -a -b 76 So to illustrate, the -a flag does something in myscript and the -b flag sets some ...
theta's user avatar
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1 vote
0 answers
473 views

I use the following command, as part of a script, to backup from my W10 machine with WSL to a Debian box: rsync -PaSh --stats --delete -e 'ssh -p XXXX -i ~/keys/key' /mnt/c/Users/User/Desktop/ user@...
NoExpert's user avatar
  • 499
1 vote
0 answers
42 views

I am a bit at a loss right now as to why a script of mine does not work as I perceived it. Since id3v2 is a bit complex to use, I tried to simplify its uses by writing a script around it. The parts ...
Phoenix's user avatar
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213 votes
6 answers
341k views

$ ls -l /tmp/test/my\ dir/ total 0 I was wondering why the following ways to run the above command fail or succeed? $ abc='ls -l "/tmp/test/my dir"' $ $abc ls: cannot access '"/tmp/test/my': No such ...
Tim's user avatar
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282 votes
3 answers
57k views

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 ...
Stéphane Chazelas's user avatar
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40 votes
3 answers
28k views

I have a script running on Linux that accepts some parameters. I would like to do something like: if [[ $CONDITION == "true" ]]; then script param1 --param2 else script param1 fi I would ...
Jim's user avatar
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51 votes
2 answers
13k views

Can I safely omit quotes on the right side of a local assignment? function foo { local myvar=${bar} stuff() } I'm mainly interested in bash, but any info on corner cases in other shells are ...
rahmu's user avatar
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6 votes
2 answers
5k views

I was exploring the tracing of commands using set -x (set +x to unset) in bash: Print a trace of simple commands, for commands, case commands, select commands, and arithmetic for commands and ...
user avatar
3 votes
3 answers
10k views

I'm writing a script to run a given program on a simulator while changing the argument supplied and I'm having a problem where bash keeps inserting single ticks around the double quotes that causes ...
Nubcake's user avatar
  • 143
1 vote
2 answers
5k views

In bash, given these files: $ cat noquotes.txt s/a/b/g $ cat quotes.txt "s/a/b/g" Why does $ echo "aaa" | sed -e $(cat noquotes.txt) bbb succeed, but $ echo "aaa" | sed -e $(cat quotes.txt) sed: 1: ...
mark's user avatar
  • 175
0 votes
1 answer
2k views

I would like to compose a string of command line arguments in a variable, then use those to execute a command. I show a simplified example below. It's is a script called "listfiles." It ...
dougd_in_nc's user avatar
  • 103
1 vote
2 answers
780 views

Sory I'm new to shellscripting. I have a variable that contains an option related to find command. TYPE=("-type f") NAME=("-name \"*log*\"") I try put those variable ...
user3679987's user avatar
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-1 votes
1 answer
328 views

I've got a third party script that receives command line arguments in this form: $ ./script.sh --params a=123 b=456 There is a file xyz.txt with this contents: c=3 d=4 I'm trying to use its contents ...
txauma's user avatar
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0 votes
1 answer
87 views

I'm compiling Nginx from source on Debian 12 in Bash. I'd like to select the TLS vendor (e.g. LibreSSL, OpenSSL) via a preflight variable ($nginx_tls_vendor). An example configure command without the ...
Pete Cooper's user avatar
  • 163
0 votes
1 answer
118 views

I have a variable that contains a find command LST_FILE=$(find . -type f \( -name -o '*xml*' -o -name -o '*log*' \) -mmin 180) Is it possible to append the command ? I mean like this LST_FILE+=$(-...
user3679987's user avatar
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