I have this script:
num='[0-9]'
sedcmd='-e "s/${num}/as df/g"'
echo 123 | sed -r $sedcmd
The last line produces this:
sed: -e expression #1, char 1: unknown command: `"'
What did I miss?
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1 Answer
Do not use a variable to store shell commands, use an array. See BashFAQ-50 I'm trying to put a command in a variable, but the complex cases always fail.
You just use an array as below
num='[0-9]'
argArray=('-e' "s/${num}/as df/g")
and double-quote the array expansion to not let the words be split by Word-splitting and call as
echo 123 | sed -r "${argArray[@]}"