Setting a variable and utilizing sed

Question

I've been trying to wrap my head around this for over an hour now and my searches haven't helped yield the answer.

Trying to set a variable inside a bash script. This variable is taking variable-A and removing variable-B from it.

Prefix="$(echo ${Process} | sed -e 's/${Server}//g')"

So if Process=abcd1wxyz01 and Server=wxyz01, then Prefix should end up being abcd1.

I've tried so many iterations from online searches I honestly can't recall what all I've tried.

score 2 · Answer 1 · answered Aug 23 '18 at 18:06

Your problem are the quotes, as pointed out in afsal_p's answer.

You could do this with parameter expansion instead:

$ process=abcd1wxyz01
$ server=wxyz01
$ prefix=${process%"$server"}
$ echo "$prefix"
abcd1

The ${word%suffix} expansion removes suffix from the end of word.

score 0 · Accepted Answer · edited Aug 23 '18 at 17:59

0

please use " instead of ' while using bash variables inside sed:

Prefix="$(echo ${Process} | sed -e "s/${Server}//g")"
echo $Prefix

edited Aug 23 '18 at 17:59

Charles Duffy

answered Aug 23 '18 at 17:58

afsal_p

`echo "${Process}"` or `echo "$Process"` would also be more correct than `echo ${Process}`; see [BashPitfalls #14](http://mywiki.wooledge.org/BashPitfalls#echo_.24foo). Similarly, `echo $Prefix` should be `echo "$Prefix"` – Charles Duffy Aug 23 '18 at 18:00
Thank you so much for the clarification – afsal_p Aug 23 '18 at 19:48

2 Answers2