i am using grep command to create an array using data from a file. These is a sample from a file abc.xyz
[abc] Hello world
[abc] qwertyuy
[qwe] poiuyttrr
[abc] Zzxcvzxvxczv
I want to store each of the lines in an array which is having word'[abc]' in the begining I am using the following command
grep -n "\[abc\]" abc.xyz
And storing it in a variable, But the varaiable is got getting stored as an array. Please suggest how to do it.
Assuming you have Bash or Korn shell:
var=( $(grep -n "\[abc\]" abc.xyz) )
The var=( … ) creates the array. The $( … ) executes a command and the result is tokenized. Note that the tags etc will be split into separate words. For your input file, the output is:
$ printf "%s\n" "${var[@]}"
1:[abc]
Hello
world
2:[abc]
qwertyuy
4:[abc]
Zzxcvzxvxczv
$
If you want to split on newlines, you have to play with IFS:
$ old="$IFS"
$ IFS=$'\n' # Bash - may not be available in ksh
$ var=( $(grep -n "\[abc\]" abc.xyz) )
$ IFS="$old"
$ print "%s\n" "${var[@]}"
1:[abc] Hello world
2:[abc] qwertyuy
4:[abc] Zzxcvzxvxczv
$
