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Delete all *.zip files under current directory that are older than 2 days | find . -name "*.zip" -mtime +2 orint0 | xargs -0 rm |
Page through the contents of yourFile, adding a $ at the end of each line. | cat -e yourFile | less |
prints the maven project version | mvn help:evaluate -Dexpression=project.version | tail -8 | head -1 |
find files in /usr directory which are modified after February 1 of the current year | find /usr -newermt "Feb 1" |
Login to a bash shell on localhost via ssh and print the bash version | echo 'echo "Bash version: ${BASH_VERSION}"' | ssh -q localhost bash |
create a compressed archive "filename.tar.gz" with verbose output | tar -cvzf filename.tar.gz folder |
Check if the file "somelink" links to exists | ls `readlink somelink` |
Display the biggest file sizes only | find -type f -exec du -Sh {} + | sort -rh | head -n 5 |
Print the names and sizes of regular files residing in the current directory tree | find $/* -type f -exec stat -c "f%15s %n" {} + |
Remove what follows the forth occurrence of the character ":" in any field which contains it | sed -r 's/((:[^: \t]*){3}):[^ \t]*/\1/g' file | column -t |
Find empty files and directories | find . -empty |
Gets IP address of first listed active network interface in system. | ifconfig | grep 'inet addr:' | grep -v '127.0.0.1' | awk -F: '{print $2}' | awk '{print $1}' | head -1 |
Search for "mpirun" in all processes owned by the current user | pgrep -u `whoami` mpirun |
Save count of lines from file $file matching with pattern $filter and not matching with pattern $nfilter in variable 'totalLineCnt' | totalLineCnt=$(cat "$file" | grep "$filter" | grep -v "$nfilter" | wc -l | grep -o '^[0-9]\+'); |
Display infinite scroll of random ASCII art | yes 'c=(╱ ╲);printf ${c[RANDOM%2]}'|bash |
Create a new window in an existing screen session and run a script | screen -S demo -p 1 -X screen '/home/aa/scripts/outputs.sh' |
Unzip and extract "userAgent=[^=]*'" from "input.gz" | zcat input.gz | grep -o 'userAgent=[^=]*' | sed 's/ [^ ]*$//' |
Display current system's kernel name, kernel release and version, and machine architecture | uname -srvm |
Unzip "daily_backup.sql.gz" and search for lines matching "'x'|/x/" | zcat daily_backup.sql.gz| grep -E "'x'|/x/" |
find all files in the current folder which have been modified in the last 24 hours | find . -mtime -1 -print |
Calculate the sum of all the numbers from 1 to 10 | seq 10 | tr '[\n]' '+' | sed -e 's/+/ + /g' -e's/ + $/\n/' | xargs expr |
Prints full path to files in a current folder. | ls -d -1 $PWD/** |
Search "file1" for lines matching regex patterns listed in "file2" and list the unique results (sorted alphabetically) | grep -f file2 file1 | sort | uniq |
returns a list of files modification newer than poop | find . -mnewer poop |
display all hidden files in the current folder | find . -type f -name ".*" |
find all the empty directories in the current folder and all its sub directories too | find . -depth -empty -type d |
Make directories "./es/es_MX.utf8/LC_MESSAGES" as needed and do not error if it exists | mkdir --parents ./es_MX.utf8/LC_MESSAGES |
Find the string 'joomla' case insensitively in all the php and html files under current directory tree and display the matched lines along with the file names and line numbers | find . \( -name "*.php" -o -name "*.html" \) -print0 | xargs -0 grep -Hin "joomla" |
Print the last line of "$file1" to the console and append to "$file2" | tail -1 $file1 | tee -a $file2 |
Find directories in /home/vmail that match pathname "*/*/Maildir/.LearnAsSpam/cur", and move them to folder .Junk/cur | find /home/vmail/ -type d -path "*/*/Maildir/.LearnAsSpam/cur" -exec sh -c '' ';' |
search for the word "nameserver" in all the configuration files of the /etc folder | find /etc/ -type f -name "*.conf" -print0 | xargs -I {} -0 grep "nameserver" "{}" |
Find all files/directories under current directory and sort them | find | sort |
Find all *.c files under /home | find /home -name "*.c" |
recursively change owner of the directory /usr/local/lib to the current user | sudo chown -R `whoami` /usr/local/lib |
Find regular files with permissions less than 111 | find -perm -111 -type f |
Find all the SGID bit files under current directory whose permissions set to 644 and show a few lines of output from the beginning | find . -perm 0644 | head |
Convert symlink to regular file | find . -type l | while read f; do /bin/cp -rf --remove-destination -f $(find . -name $) "${f}";done; |
Find all files/directories in entire file system that are exactly 50 bytes | find / -size 50c |
Find all files in the `sourceDir' directory | find sourceDir -mindepth 1 -maxdepth 1 |
Find files/directories under current directory that matches './projects/insanewebproject' in their paths and show the first one | find -ipath './projects/insanewebproject'| head -n1 |
display all the files in the current directory excluding those that are in the 'secret' directory | find . -name 'secret' -prune -o -print |
Find files with SGID (2000) and SUID(4000) permssions set in the file system | find / \( -perm -2000 -o -perm -4000 \) -ls |
search for all the files in current folder which start with "file2015-0" and move them to another folder | find . -name "file2015-0*" -exec mv {} .. \; |
Check if the directory tree whose name is given as variable $somedir contains no regular files | find "$somedir" -type f -exec echo Found unexpected file {} \; |
List current user's crontab. | crontab -l |
Unsets GIT_DIR variable. | unset GIT_DIR |
Find all directories under $1/.hg and set their SGID bit | find $1/.hg -type d -exec chmod g+s {} \; |
Find all files/directories under current directory tree that are newer than backup.tar.gz by modification time | find . -newer backup.tar.gz |
Make 3 directories named "$HOME/Labs/lab4a/folder" followed by a 3 width zero padded number from 1 to 3 | mkdir $(seq -f "$HOME/Labs/lab4a/folder%03g" 3) |
Copy the file foo.sh into /tmp of the docker container | tar -c foo.sh | docker exec -i theDockerContainer /bin/tar -C /tmp -x |
Go to directory /cygdrive/c/Program Files (x86) using backslashes to escape special characters | cd /cygdrive/c/Program\ Files\ \(x86\) |
Change the ownership of "/etc/udev/rules.d/51-android.rules" to "root" | sudo chown root. /etc/udev/rules.d/51-android.rules |
excute script makeallsizes with all '*.jpg' file under originals directory. | find originals -name '*.jpg' | xargs -1 makeallsizes |
Archive "_vimrc" to "~/.vimrc" suppressing non-error messages and compressing data during transmission | rsync -aqz _vimrc ~/.vimrc |
List all variables (names and values) whose name or value contains X. | env | grep ".*X.*" |
Find directory "your/dir" if it is empty | find your/dir -prune -empty |
Find all Name* files under ../../$name-module and rename them by replacing 'Name' with $Name in their names | find ../../$name-module -print0 -name 'Name*' -type f | xargs -0 rename "s/Name/$Name/" |
Print the input "hello world" to the console followed by a swap of the first two awk fields | echo hello world | tee /dev/tty | awk '{print $2, $1}' |
remove all the core files in the home folder | find /home -name core -exec rm {} \; |
Find files ending in "f" | find . -path '*f' |
Calculate the md5 sum of all *.py files in the current directory | cat *.py | md5sum |
Recursively change the ownership of all directories in the current directory excluding "foo" to "Camsoft" | ls -d * | grep -v foo | xargs -d "\n" chown -R Camsoft |
Display inputfile all on one line | awk '{printf "%s ", $0} END {printf "\n"}' inputfile |
Delete all regular files under current directory | find . -type f -print0 | xargs -0 /bin/rm |
find all the "jpg" file in a folder. | find /win/C -iname *JPG |
Set permissions for all direcotries under /var/www to 755 | find /var/www -type d -print0 | xargs -0 chmod 755 |
recursively change owner and group of the directory and all files into it to user "user" and group "www-data" | chown -R user:www-data yourprojectfoldername |
Move all files from the `sourceDir' directory tree to the `destDir' directory | find sourceDir -mindepth 1 -exec mv "{}" --target-directory=destDir \; |
Find all directories under maximum 1 level down the current directory and set their permission to 700 | find . -mindepth 1 -type d | xargs chmod 700 |
delete all the files in the current folder which end with ".bak" or ".backup" and which have not been accessed in the last 30 days | find . ( -name '*.bak' -o -name *.backup ) -type f -atime +30 -exec rm '{}' ; |
search for all the ".c" files in the folder "/home/david" which have been modified in the last 10 minutes | find /home/david -mmin -10 -name '*.c' |
display all files in the current folder expect text files | find . -name "*.txt" -prune -o -print |
Find all files under /home/mywebsite/public_html/sites/all/modules and set their permission to 640 | find /home/mywebsite/public_html/sites/all/modules -type f -exec chmod 640 {} + |
Find files that are orphaned | find -nouser |
Count total number of lines in all files below current directory. | find . -type f -exec wc -l {} \; | awk '{ SUM += $0} END { print SUM }' |
start 2 sleep processes in the background | sleep 100 | sleep 200 & |
Counts lines in each of *.php files in a current folder and subfolders ignoring 'tests' folder and prints total count as well. | find . -name tests -prune -o -type f -name '*.php' | xargs wc -l |
find all the files in the folder ./machbook and change the owner of them to the user with id "184" | find ./machbook -exec chown 184 {} \; |
Display the contents of "sample_0001.gz" with "lk=1&" removed | zcat sample_0001.gz | sed -e 's/lk=1&//g' |
Find all files/directories under /proc and run ls command on each. | find /proc -exec ls '{}' \; |
Synchronize "/home/user1/" to "wobgalaxy02:/home/user1/" including hidden files | rsync -av /home/user1/ wobgalaxy02:/home/user1/ |
List all available commands in Mac OS | echo $PATH | tr ':' '\n' | xargs -I {} find {} -maxdepth 1 -type f -perm '++x' |
list PID of a group leader | jobs -lp |
Write output and error of "bash myscript.sh" to standard output and to "output.log" | bash myscript.sh 2>&1 | tee output.log |
Write the standard output and error of "someCommand" to the console and append it to "someFile" | someCommand 2>&1 | tee -a someFile |
Search for "largecalculation" in all processes owned by the current user | ps -u `whoami` | grep largecalculation |
find all regular/normal files which have cpp folder in their path | find . -type f -path "*/cpp/*" |
Run 'join' with the number-sorted output of file1 and file2, without modifying file1 or file2: for each line with a common first field in file1 and file2, output the common field followed by the extra fields in both files. | join < < |
find all jpg files in the folder which are in the path "/201111/" and sort them based on name | find */201111/* -name "*.jpg" | sort -t '_' -nk2 |
Automatically spell check file "text.txt" using "aspell" command | yes 1 | script -c 'aspell check text.txt' /dev/null |
find all the regular files in the current folder which start with a "some text" | find . -type f -name '*some text*' |
display all the files in the current folder which do not belong to any group | find . -nogroup |
Find files and directories modified in last 7 days | find . -mtime -7 |
Prints last modified file in a current folder. | find . -type f -printf '%T@ %p\n' | sort -n | tail -1 | cut -f2- -d" " |
Find out all *.sh owned by user vivek | find / -user vivek -name "*.sh" |
Replace the spaces after line number in the output of history with ".." | history | sed 's/^\( *[0-9]*\) */\1../' |
List all regular files from the current directory tree that were modified less than 60 minutes ago | find . -mmin -60 -type f -exec ls -l {} \; |
display all the files in current folder which are bigger than 10KB | find . -size +10k |
display all the log files in the folder /var/log, print0 is used to handle files with only spaces in their names or which have newlines in their names | find /var/log -name "*.log" -print0 |
find all raw images in the current folder and pass them one at a time to the xargs command and enable parallel processing of the files | find . -type f -iname '*.CR2' -print0 | xargs -0 -n 1 -P 8 -I {} |
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