I have a file which is 1500 lines long containing cpu values, but somehow there is 0 very second line. Is it possible to remove every second line containing only 0 in a bash command ?
8
0
9
0
10
0
10
0
8
0
9
0
Remove all zeros
Use grep -v:
-v, --invert-match
Selected lines are those not matching any of the specified patterns.
Command:
grep -v -e "^0$" file
The problem with this is that it will remove lines all '0' lines.
Remove even lines
awk 'NR % 2 != 0' file
In this case, you have to be sure that all even lines are the ones you want to remove.
Remove even lines that are '0'
awk 'NR % 2 != 0 || ! /0/' file