GREP Commands Cheat Sheet
Here is a cli commands cheat sheet for GREP command, you can use this as a quick reminder for basic commands with a brief description for each of the commands.
What is GREP command?
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# To search a file for a pattern:
grep
# To perform a case-insensitive search (with line numbers):
grep -in
# To recursively grep for string in :
grep -R
# Read search patterns from a file (one per line):
grep -f
# Find lines NOT containing pattern:
grep -v
# Set how many lines to show before (-B) and after (-A) pattern:
grep -B 3 -A 2
# To grep with regular expressions:
grep "^00" # Match lines starting with 00
grep -E "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}" # Find IP add
# To find all files that match in
grep -rnw -e
# To exclude grep from your grepped output of ps:
# (Add [] to the first letter. Ex: sshd -> [s]shd)
ps aux | grep '[h]ttpd'
# Colour in red {bash} and keep all other lines
ps aux | grep -E --color 'bash|$'
Check out the GREP command documentation .
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