[mdlug] Bash back quotes do not work with backslash

[Aaron Kulkis]

R KANNAN wrote:
> Bash Gurus,
> 
> I am trying to look for a string in a file on lines which don't start with
> a '$' and use that line for further processing in bash.
> 
> 
> Somehow setting a variable from a command (using back quote) gives
> different results than the command itself.
> 
> 
> 
> [t7689rk at lh070p8x WK]$ fgrep -i AMLSNCPU WK_sol_103_amls.dat | grep -m 1 -v
> ^'\$'
> 
> PARAM,AMLSNCPU,4
> 
> [t7689rk at lh070p8x WK]$ test=`fgrep -i AMLSNCPU WK_sol_103_amls.dat | grep
> -m 1 -v ^'\$'`
> 
> [t7689rk at lh070p8x WK]$ echo $test
> 
> $ Use AMLSNCPU=4
> 
> 
> 
> Looks like the escaping of $ within back quotes is not working.
> 
> 

The alternative to `pipeline` is $(pipeline)

so try this:

test=$(fgrep -i AMLSNCPU WK_sol_103_amls.dat | grep -m 1 -v ^'\$')



$(pipeline)  means

run pipeline in a subshell (), and
return the output as a string $