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Replace /tmp/storequote with /tmp/tmpdata in sed:
sudo sed -i "s/\/tmp\/storequote/\/tmp\/tmpdata/g" config.py
It works fine,/ was escaped by \.I want to use string variable which contains special characters in sed.
string1='/tmp/tmpdata'
string2='/tmp/storequote'
sudo sed -i "s/$string1/$string2/g" config.py
It encounter a issue:
sed: -e expression #1, char 8: unknown option to `s'
How to fix it?
Sed allows you to use other separators than / in a substitution.
For example, with a colon:
sudo sed -i "s:$string1:$string2:g" config.py
Now suppose string1 (or string2) contains a colon, you'll again get a broken sed command. Same if they contain a semi-colon, which is used to separate sed commands.
If you use bash, one solution to easily escape those special characters is to carefully choose a separator that has a special meaning for bash (like |), and use printf %q which will escape it for you, while keeping your command readable:
printf -v sed_command 's|%q|%q|g' "$string1" "$string2"
sudo sed -i "$sed_command" config.py
Warning: this hack won't escape dot characters in string1 which will retain their special meaning (i.e. any character). Keep in mind this is a hack that saves you from having headaches escaping possible special char.
