Find Grep SED AWK - Linux Docs

Find, Grep, SED and AWK commands

Recursively '-r' search for the text string '- Server Name', backslash is an escape character for '-', exclude directories proc and sys

grep -r --exclude-dir={proc,sys} '\- Server Name'

Grep recursive (-r) in php files and find 'fping' -- './' means start in the current directory.

grep -r --include='*.php' 'fping' ./

Find all 'png' files, recursive.

find . -type f -name '*.png'

Shows the packages installed without date or time etc. Remove everything before the last ':' in a line, also remove any extra spaces.

cat /var/log/yum.log | grep -E 'Installed|Updated' | sed 's/.*://g;s/ //g'

Find httpd processes, remove the grep process that is searching for 'httpd'

ps -ef | grep -v " $$ .*grep " | grep httpd

Fast way to find all files that contain a matching string.

find . -type f -print0  | xargs -0 grep -Fil "librenms"

Find files that match file extension '*.sh' and delete them.

find . -type f -name '*.sh' -delete

Find files that contain a text string inside the file and only output file name.

find . -type f -print0 | xargs -0 grep -l "port_bits"

Find files (-f), match (grep) filenames that contain 'switch', pipe to xargs to remove (rm) the matching files.

find ./ -type f | grep switch | xargs rm

Same as above, but only echo 'rm' files, does not remove the files, this is a good test before you permanently remove files

find ./ -type f | grep switch | xargs echo rm

Find duplicate files using checksum values.

find ./ -type f -print0 | xargs -0 -n1 md5sum | sort -k 1,32 | uniq -w 32 -d --all-repeated=separate | sed -e 's/^[0-9a-f]*\ *//;'

Remove file by inode number rather than file name, helpful if the filename contains special characters like {\|})( etc. Use 'ls -li' to find inode number.

find . -inum 4294 -delete

Return strings that contain '.x86_64' and('\|') 'noarch', do NOT return whole line. grep -o means return strings that contain the first string (x86_64) and('\|') the second string (noarch).

yum history info brasero | grep -o '[^ ]*.x86_64[^ ]*\|[^ ]*noarch[^ ]*'

cat --show text output of a file, -n show line numbers, | to grep and find lines that match 'discovery.php', | to less for easy navigation. cat definition: concatenate, or string things together in a chain or series.

cat -n /var/log/cron | grep discovery.php | less

list directory, -l long list format, -a all files, -h human readable file size. | awk (awk is a text parser/filter), 'print' print the output of column '$3' then "\t" tab, then column '$9'

ls -lah | awk '{print $3 "  " $9}' > temp2

##ls -lah output:
drwxr-xr-x 10 apache apache  153 Sep 28 20:23 docs

##output piping ls -lah through awk '{print $3 "  " $9}'
apache  site