I have a question to this read line. I have in my file n lines. How can I store the value in the line below in the same loop step? Can maybe someone help me with that?
Thank you
Details:
$ cat testfile.txt
1
2
3
4
5
6
7
8
9
10
while read line; do echo "Current line read: $line"; echo "Line below: grep -A 1 $line testfile.txt"; done < testfile.txt
while read line; do echo "Current line read: $line"; echo "Line below: `grep -A 1 $line testfile.txt`"; done < testfile.txt
Current line read: 1
Line below: 1
2
--
10
Current line read: 2
Line below: 2
3
Current line read: 3
Line below: 3
4
Current line read: 4
Line below: 4
5
Current line read: 5
Line below: 5
6
Current line read: 6
Line below: 6
7
Current line read: 7
Line below: 7
8
Current line read: 8
Line below: 8
9
Current line read: 9
Line below: 9
10
Current line read: 10
Line below: 10
#
grep -A 1 6 testfile.txt 6 7
grep -A 1 6 testfile.txt | grep -v 6 7
