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Find all files/directories with permission $permissions under $directory directory tree | find "$directory" -perm "$permissions" |
Adjust the timestamp of 'filename' by subtracting 2 hours from it. | touch -d "$(date -r filename) - 2 hours" filename |
Search $MYGROUP in /etc/group, take the 4th colon separated field, replace comma with newline and save the result to variable 'MYUSERS' | MYUSERS=`grep $MYGROUP /etc/group | cut -d ":" -f4| tr "," "\n"` |
Compare files "A1" and "A2" with 3 lines of unified context and print lines beginning with "+" | diff -u A1 A2 | grep -E "^\+" |
Counts all files in a current folder and subfolders. | find -type f -printf '\n' | wc -l |
Search the .java files from the current directory tree for TODO lines | find . -name "*.java" -exec grep -i -n TODO {} \; |
Recursively finds and compresses all files in a current folder. | find . -type f -exec bzip2 {} + |
Archive "foo/bar/baz.c" to "remote:/tmp/" preserving the relative path of "foo/bar/baz.c" | rsync -avR foo/bar/baz.c remote:/tmp/ |
SSH into "$NAME" as user "${USERNAME}" using key file "${KEYDIR}/${KEY}.pem", automatically add the host to list of known hosts and execute "${COMMANDS}" | ssh -o "StrictHostKeyChecking no" -i ${KEYDIR}/${KEY}.pem ${USERNAME}@$NAME "${COMMANDS}" |
List the commands in /usr/bin, pausing for user input after each page. | more <( ls /usr/bin ) |
display all sqlite files in the current directory along with their timestamp | find ./ -name "*.sqlite" -printf '%Tc %p\n' |
Deletes folder like /tmp/*/* or deeper, older than +7 days if they don`t contain files or other folders. | find /tmp/*/* -mtime +7 -type d -exec rmdir {} \; |
change owner and group of the current directory and all files into it to user and group andrew | chown -R andrewr:andrewr * |
Find all .php files in all directory trees matching pattern `/srv/www/*/htdocs/system/application/' and search those files for string "debug (" | find /srv/www/*/htdocs/system/application/ -name "*.php" -exec grep -H "debug (" {} + |
Search the entire file hierarchy for files ending in '.old' and delete them. | find / -name "*.old" -exec /bin/rm {} \ |
change the permission of all directories in current folder to 755. | find . -type d -exec chmod 755 {} \; |
Move all *.pdf.marker files and their corresponding *.pdf files under ${INPUT_LOCATION} to ${OUTPUT_LOCATION} | find $INPUT_LOCATION -name '*.pdf.marker' | xargs -i bash -c 'mv ${0%.marker} $0 $1' {} $OUTPUT_LOCATION |
List the files in the /etc directory tree containing text '128.200.34.' | find /etc -type f -print | xargs grep -il '128\.200\.34\.' |
Print 10 space separated "x"s with at most 4 per line | yes x | head -10 | awk 'BEGIN { RS = "%%%%%%%" } { split($0,a,"\n"); for (i=1; i<length(a); i+=4) print a[i], a[i+1], a[i+2], a[i+3] }' |
Report file system containing path to /dir/inner_dir/ disk usage human-readable. | df -h /dir/inner_dir/ |
Print a sorted list of the extensions of the regular files from the current directory tree with counts per extension | find . -type f | perl -ne 'print $1 if m/\.$/' | sort | uniq -c | sort -n |
Find all catalina* files/directories under current directory | find -name 'catalina*' |
Fix files to default permissions 644 | find . -type f -exec chmod 644 {} \; |
search for "flac" files in current folder using regular expressions | find ./ -regex "./cmn-.\.flac" |
Find files and directories owned by xuser1 and change their ownership to user2 | find . -user xuser1 -exec chown -R user2 {} \; |
Uninstalls and then installs git formula. | brew reinstall git |
Saves list of currently logged in users in 'userlist' variable. | userlist=$ |
Find files whose data was modified within the given days of the month | find ./ -daystart -mtime -10 -and -mtime +1 |
Remove the passphrase from ~/.ssh/id_rsa. | ssh-keygen -f ~/.ssh/id_rsa -P "" |
Remove regular files whose names match Perl regular expression '\w+-\d+x\d+\.\w+$' from the current directory tree | find -type f | grep -P '\w+-\d+x\d+\.\w+$' | xargs rm |
Print second section of space-separated data coming from stdin. | cut -d ' ' -f 2 |
Use the last 100 lines of "file1" as input to "wc -l" and monitor the pipeline with the "pv" command | tail -n 100 file1 | pv | wc -l |
Find the empty directories and files under current directory | find -empty |
Disable wildcard expansion and name globbing | set -f |
Create an empty file "foo" in each directory under the current directory containing a file named "bar". | find -name "bar" -execdir touch foo \; |
Find all files/directories in entire file system that are owned by "syslog" user | find / -user syslog |
Search for 'example' in all regular files from the current directory | find -maxdepth 1 -type f | xargs grep -F 'example' |
Print the percentage of packets lost of the 5 packets sent to "$host" | ping -c 5 -q $host | grep -oP '\d+(?=% packet loss)' |
Change the permissions of all regular files whose names end with .mp3 in the directory tree /var/ftp/mp3 | find /var/ftp/mp3 -name '*.mp3' -type f -exec chmod 644 {} \; |
View history using "vim" | vim <(history) |
Creates temporary folder in /tmp/ (by default) with 10-letter suffux. | mktemp -d -t |
Find files/directories under current directory matching the posix-egrep type regex ".+\.$" in their names | find . -regextype posix-egrep -regex ".+\.$" |
Gets IP address of 'en0' network interface. | ip addr show en0 | awk '$1 == "inet" {gsub; print $2}' |
Print list of disk and mountpoint of disks matching "/dev/sd*" | paste <(mount | awk 'tolower ~ /\/dev\/sd*/ {print NR "\t" $1 "\t" $3}') < |
Print numbers from 1 to 10 with 2 values per line | seq 10 | sed '2~2G' | awk -v RS='' '{$1=$1; print}' |
search for files in the current folder using name patterns | find . -name '[mM][yY][fF][iI][lL][eE]*' |
find all jar files in current folder and search for a file in all these jar's and display the jar names along with searched file | find . -name "*.jar" -print -exec jar -tf {} \; | awk '{ifjar=$1;else ifarr[jar]=$1;}END{for{print i " contains " arr[i]}}' |
display all the regular files in current folder excluding all the directories and all the sub directories having "normal" in their name | find . \( \( -path "\.?.*" -type d \) -o -path "*normal*" \) -prune -o \( -type f \) -print |
Create a named screen session | screen -X title mynewtitle |
For each line which has a common first field in test.1 and test.2, output the first 2 fields of test.2 and the field 2 and 3 of test.1 | join -j1 -o 2.1,2.2,1.2,1.3 < < |
List all *.txt files/directories under current directory | find . -name "*.txt" -print |
Compress all files in the "$FILE" directory tree that were last modified 30 days ago and have not already been compressed with gzip | find $FILE -type f -not -name '*.gz' -mtime 30 -exec gzip {} \; |
Send SIGTERM signal to all processes using TCP port 8080, requesting them to terminate. | kill $ |
Print content of all files found regarding seach options '[whatever]' | find [whatever] -print0 | xargs -0 cat |
Rename $file file, preserving only part of name before '-' symbol, and appending '.pkg' suffix to the end | mv $file $.pkg |
display a list of all java or jsp files in the current folders | find . \( -name '*jsp' -o -name '*java' \) -type f -ls |
Search the entire file hierarchy for files ending with '~' and print all matches except for those with '/media' in their pathnames. | find / -name "*~" | grep -v "/media" |
Find all files beneath the current directory that end with the extension .java and contain the characters String ignoring case. Print the name of the file where a match is found. | find . -type f -name "*.java" -exec grep -il string {} \; |
Print a welcome message with the current user's user name | echo -ne "Welcome $(whoami)!\n" |
Decompress 'file.gz' to standard output and execute the output in bash | gzip -d --stdout file.gz | bash |
Unset RBENV_VERSION variable from within tmux session. | tmux set-environment -u RBENV_VERSION |
Change owner to "root" and group to "wheel" of "bin" | sudo chown root:wheel bin |
Determine if user "$USER" is logged in | who | grep $USER |
search for a word in all the files in the current directory | find . -exec grep chrome {} \; |
Search the current directory tree for regular files changed on the 10th of September | find ./ -type f -ls |grep '10 Sep' |
Find all your text files | find . -name "*.txt" -print |
Execute `somecommand' on each file from the current directory tree with the environment variable f set to the filename | find . -exec env f={} somecommand \; |
Search for all files in the /home directory tree that have the same inode number | find /home -xdev -inum 2655341 |
Find out if there are any files on the system owned by user `account' | find / -path /proc -prune -o -user account -ls |
Remove sess_* files that were modified more than 2 days ago | find sess_* -mtime +2 -exec rm {} \; |
Find all files matching pattern '.#*' in the current directory tree | find -iname '.#*' |
Remove all files containing 'sample' in their names under '/home/user/Series' directory tree | /usr/bin/find /home/user/Series/ -iname "*sample*" -exec rm {} \; |
Rotates the dirs stack so that the second directory is at the top. | pushd -2 |
Search for 'class Pool' in all *.java files under current directory | find -iname '*.java'|xargs grep 'class Pool' |
Search the current directory tree for regular files that contain "string" | find . -type f -print0 | xargs -0 grep string |
Output "file.txt", omitting all containing directories "some/unknown/amoutn/of/sub/folder/" | basename "some/unknown/amount/of/sub/folder/file.txt" |
Treat references to unset variables as errors | set -o nounset |
Ping all hosts in file "ips" twice | cat ips | xargs -i% ping -c 2 % |
Counts all top-level files in a current folder. | ls -1 | wc -l |
bind key "\x61" to insert itself | bind $'"\x61"':self-insert |
Find all files/directories under $1 which have at least write permission for their owner and set write permission for group for these files/directories | find $1 -perm -u+w -exec chmod g+w {} \; |
Execute "wget -qO- http://fake.link/file.txt | tail" every 5 seconds | watch -n 5 "wget -qO- http://fake.link/file.txt | tail" |
Read a line from standard input into variable "message" with escaped prompt "\nPlease Enter\na Message: '" | read -p "`echo -e '\nPlease Enter\na Message: '`" message |
find all the files that have been modified today | find . -type f -mtime 0 |
find all the files ending with ".coffee" in the current folder and search for the first occurence of the word "re" in each line | find . -name '*.coffee' -exec awk '/re/ {print;exit}' {} \; |
Search /var for files matching regular expression '.*/tmp/.*[0-9]*.file' | find /var -regex '.*/tmp/.*[0-9]*.file' |
search character special files called ' backup ' from /usr directory downwards and print them . | find /usr -type c -name backup -print |
Find all *.jpg files and copy them to / | find / -type f -name *.jpg -exec cp {} . \; |
Create a symbolic link named ".profile" to "git-stuff/home/profile" without dereferencing ".profile" | ln -sn git-stuff/home/profile .profile |
Ping the broadcast address "10.10.0.255" | ping -b 10.10.0.255 |
Convert relative path "/x/y/../../a/b/z/../c/d" into absolute path with resolved symbolic links | readlink -f /x/y/../../a/b/z/../c/d |
Show find's version | find --version |
Find the file whose inode number is 1316256 | find . -inum 1316256 |
display all symbolic links in current folder | find . -lname "*" |
login as user root | su -l |
List all .svn files/directories under current directory | find . -name .svn -exec ls {} \; |
Force decompress all files into '/etc' | gzip -d --force * /etc |
Display the sizes and filepaths of all files/directories with '.undo' extension under current directory tree | find -name *.undo -print0 | du -hc --files0-from=- |
Find all the files in file system which are accessed 50 days back | find / -atime 50 |
Recursively removes all folders named '.svn' in a current folder. | find . -type d -name .svn -print0|xargs -0 rm -rf |
Subsets and Splits