If you want to search multiple words in the same grep command, then use the egrep command in UNIX (17) line starts with “.” and 2 lower case letters} letters grep '^\.' egrep command in Unix (16)any line that starts with a Period “.” grep '^\.' (15) ‘kite’, with or without quotes grep '"*kite"*' (14) ‘kite’ within double quotes grep '"kite"'
(13)lines with exactly one character grep '^.$' (12)anything, not a letter or number grep '' (11)any line with at least one letter grep '' 1.txt (10)list your mail grep '^From: ' /usr/mail/$USER (9)search for pairs of numeric digits grep '' file (7)search for TOM, Tom, TOm, or ToM grep 'T' file.txt Grep '\^s' file.txt(6)Search for ‘kite’ or ‘Kite’ (5)lines starting with ‘^s’, “\” escapes the ^ (4)lines containing only ‘kite’ grep '^kite$' (3) ‘kite’ at the end of line grep 'kite$' (2) ‘kite’ at the start of a line grep '^kite' file.txt (1)search file.txt for lines with ‘kite’ grep kite file.txt This can also be done like this also grep 'tom\|bob\|bill\|' file.txt Understanding Regular Expressions : grep regex examples (9) You can search multiple words in a file using “grep -e” grep -e tom -e bob -e bill file.txt The below example searches adpatch.log for word failure in any case grep -w failure adpatch.log (8) We can use the “grep -w” option for searching the specific work, not the sub-string. It will not show the lines which have oracle string in it ps -ef|grep -v oracle We can use grep -v to exclude the search item.
Its searches for oracle string in current directory files and all the files in a subdirectory grep -r "oracle" * (5) pipe who to grep, look for applmgr who | grep applmgr (4) find ‘run time’ or ‘run-time’ in all txt in file.txt grep runtime *.txt You can use the option “grep -i” to make it case insensitive. By default grep command is case sensitive.
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