linux - grep two strings from a file and write into a txt

Tuesday, 1 May 2018

Answer

Could you please help me how to grep two strings (or the whole lines) from one file and write them on the same line in output file?

grep -e "string1 string2" inputfile > output.txt doesn't work

for one string it works:

grep -e "string1" inputfile > output.txt

thx!

Answer

Change your grep command like below,

grep -o 'string1\|string2' file | paste - - > out.txt

This writes string1 string2 in a single line on out.txt