If $x represent column where x is 1..any what represents rows in bash

manpreet Best Answer 2 years ago

Team, i need to know how to operate on value row wise after performing grep. I can operate column wise using $ but how to on row value?

my output is

cat file.txt | grep -o 'test1[^. ]*'

output:

test1-exam1-fail
test1-exam3-fail
test1-exam5-fail

Now with above output, i can use $1 to work on test1-exam1-fail but what should i use to work on test1-exam3-fail and also on exam5?

manpreet 2 years ago

Using paste command we can convert rows to columns

cat file.txt | grep -o 'test1[^. ]*' | paste - - -

so use - equal to columns we want.

Then we can operate on these values are $x where x = 1,2,3