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List environment variables whose name contains "X" | set | grep -oP '^\w*(?==)' | grep X |
Find all files on the system that are world writeable | find / -perm -0002 |
Find all directories named "0" in the current directory tree and create a tar archive of their RS* subdirectories | find . -type d -name "0" -execdir tar -cvf filename.tar RS* \; |
Set permission of "file" to read only for the owner | chmod 600 file |
search for pattern matched files in the current folder and subfolders exclude "excluded path" | find ./ -type f -name "pattern" ! -path "excluded path" ! -path "excluded path" |
Mount the "vboxsf" filesystem "D:\share_folder_vm" on "\share_folder" | sudo mount -t vboxsf D:\share_folder_vm \share_folder |
Find all regular files under /home/www and replace every occurrences of 'subdomainA.example.com' with 'subdomainB.example.com' in those files | find /home/www -type f -print0 | xargs -0 sed -i 's/subdomainA\.example\.com/subdomainB.example.com/g' |
find all files in the current folder which have been modified after /etc/passwd | find -newer /etc/passwd |
Append *.java files from the current directory tree to tar archive `myfile.tar' | find . -type f -name "*.java" | xargs tar rvf myfile.tar |
force delete all the regular files with the name "test.txt" | find /home -type f -name test.txt -exec rm -f {} \ |
Display infinite scroll of random ASCII art | yes 'printf \\u$[2571+RANDOM%2]'|bash |
Automatically spell check file "text.txt" using "ispell" command and log the output to "out.txt" | yes 0 | script -c 'ispell text.txt' out.txt |
Write summary of files present only in dir1, and which files differ between dir1 and dir2 to file 'difference1.txt' | diff -r dir1 dir2 | grep dir1 | awk '{print $4}' > difference1.txt |
Find files which are more than 2 days old under ${userdir}/${i}/incoming directory and remove them | find ${userdir}/${i}/incoming -mtime +2 -type f -exec rm {} \; |
Search the current directory tree for *.conf and *.txt files | find . -type f \( -name "*.conf" -or -name "*.txt" \) -print |
Keep the last 4 ASCII characters of a string. | echo "0a.00.1 usb controller some text device 4dc9" | rev | cut -b1-4 | rev |
Find all *.tex files/directories in maximum 2 levels down the current directory | find . -maxdepth 2 -name '*.tex' |
Set permissions for all regular files under /var/www to 755 | find /var/www -type f -print0 | xargs -0 chmod 644 |
Find all *.csv files under /foo/bar and move them to some_dir | find /foot/bar/ -name '*.csv' -print0 | xargs -0 mv -t some_dir |
Uses GNU tool 'time' to estimate time consumed by command 'command' and redirects output to file | \time -o time.log command |
Find all files/directories under current directory that are greater than 10MB in size | find . -size +10M |
display a long ilsting of all the files in the file system which are bigger than 1KB and which have not been modified in the last 30*24 hours | find / -size +1000 -mtime +30 -exec ls -l {} \; |
Gets list of IP addresses of all network interfaces. | ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1' |
Set variable "filename" to only the name of document specified by URL, in this case "pic.jpg" | filename="`basename "http://pics.sitename.com/images/191211/pic.jpg"`" |
Move all files from the `sourceDir' directory to the `destDir' directory | find sourceDir -mindepth 1 -maxdepth 1 -print0 | xargs -0 mv --target-directory=destDir |
Search the .css files in the /starting/directory tree for ".ExampleClass" | find /starting/directory -type f -name '*.css' | xargs -ti grep '\.ExampleClass' {} |
find all the files in the entire file system that start with the word top and have 3 letters next to it. | find / -name 'top???' |
display all regular/normal files in the folder Symfony | find Symfony -type f |
Find all .sql files in the current directory recursively and print their path names separated by zeroes | find . -name '*.sql' -print0 |
Print lines in "file1.txt" that do not exist in "file2.txt" | sort <(sort -u file1.txt) file2.txt file2.txt | uniq -u |
Locate files not owned by any user or group | find / -path /proc -prune -o -nouser -o -nogroup |
find all the files in the current folder which are writable | find . -writable |
Creates random file name formatted like expression in variable ${str// /X} and saves it in 'rand_str' variable. | rand_str=$(mktemp --dry-run ${str// /X}) |
Save the md5 sum hash of "$my_iso_file" to variable "md5" | md5=$ |
Dump "file" as ASCII characters | od -t c file |
create a backup of all the files in the home folder on a partition and save the log to a file | find /home -depth -print | cpio -ov -0 /dev/rmt0 | tee -a tape.log |
Recursively set all permissions under "/opt/lampp/htdocs" to 755 | sudo chmod 755 -R /opt/lampp/htdocs |
display all files in the current folder which end with extension "myfile" followed by one digit or two digits | find . -\( -name "myfile[0-9][0-9]" -o -name "myfile[0-9]" \) |
Set 644 permission to all regular files under /path | find /path -type f -exec chmod 644 {} +; |
Enables shell option 'nullglob'. | shopt -s execfail |
Creates temporary file and saves path to it in 'fif2' variable. | fif2=$ |
Compress and display the original filename of every file on the system that is greater than 100000 bytes and ends in ".log" | sudo find / -xdev -type f -size +100000 -name "*.log" -exec gzip {} \; -exec echo {} \; |
Remount part of the file hierarchy from "olddir" to "newdir" | mount --bind olddir newdir |
Print every 4th line from 10 lines of "y" with line numbers | yes | cat -n | head -10 | awk 'NR % 4 == 1' |
Search all directories starting from the root directory for "filename" | find / -iname "filename" |
Write the standard output and error of "ls" to the console and append it to "/tmp/ls.txt" | ls 2>&1 | tee -a /tmp/ls.txt |
Print the last 1000 lines of all files matching "/var/spool/cron/*" | tail -n 1000 /var/spool/cron/* |
Read a line of standard input in an interactive shell | read -e |
Remove all regular non-hidden files modified more than 7 days ago and residing in the /tmp directory tree | find /tmp -type f -name '*' -mtime +7 -print0 | xargs -0 rm -f |
display a long listing of all the regular/normal files in the current folder along with their md5sum | find . -type f -exec sh -c 'printf "%s %s \n" "$" "$"' '' '{}' '{}' \; |
prints the name of the current git branch | git status | head -1 | cut -d ' ' -f 3 |
Find all the SGID files in the current directory tree | find . -perm /g+s |
Search directory /Users/david/Desktop/ recursively for regular files | find /Users/david/Desktop/ -type f |
find all '*.c' files under $HOME directory which context contains sprintf | find $HOME -name '*.c' -print | xargs grep -l sprintf |
find all the files starting with "config" in the folder Symfony | find Symfony -name '*config*'; |
Calculate md5 sum of the md5 sum of all the sorted files under $path | find "$path" -type f -print0 | sort -z | xargs -r0 md5sum | md5sum |
Display all lines containing UTRACE in the current kernel's compile-time config file. | grep UTRACE /boot/config-$(uname -r) |
Search for the files/directories that were modified more than an hour ago | find . -mtime +1 |
Print amount of space available on the file system containing path to the current working directory. | df $PWD | awk '/[0-9]%/{print $(NF-2)}' |
Find all files in the level 6 subdirecotries of /usr/src and below, ignoring CVS files | find /usr/src -name CVS -prune -o -mindepth +6 -print |
find all the files in the current folder and replace old string with new string | find . | xargs perl -p -i -e ‘s/something/else/g’ |
search for php files in current directory and search for a word in all these files | find -name '*.php' -exec grep -iq "fincken" {} \; -exec grep -iq "TODO" {} \; -print |
Find all files/directories under current directory bypassing file hierarchies in lexicographical order | find -s |
find foo, Foo, FOo, FOO, etc., but only dirs | find . -iname foo -type d |
display all files ending with "ini" in current folder | find . -type f -name '*.ini' |
Print the names and sizes of regular files residing in the "tmp" directory tree | find tmp -type f -printf "f %s %p\n" | awk '{sub(/^[^ ]+ +[^ ]/,sprintf)}1' |
find all the configuration files in the file system | find / -name "*.conf" |
find all files in the current folder that are not modified in the last 240 hours | find . -mtime +10 -print |
Find all files/directories named file in minimum 4 levels down the current directory | find -mindepth 4 -name file |
Find files which are more than 2 days old under ${userdir}/${i}/incoming directory | find ${userdir}/${i}/incoming -mtime +2 -type f -ls |
Find all files/directories with name pattern $nombre that are at most 2 levels down the $DIR_TEMPORAL and $DIR_DESCARGA directories and show only the file names appended with '.torrent' | find "$DIR_TEMPORAL" "$DIR_DESCARGA" -maxdepth 2 -name "$nombre" -printf '%f.torrent\n' |
search for the word "mysql" in all the files in the current containing the word "notes" in their name | find . -iname "*notes*" | xargs grep -i mysql |
Find regular files named "expression -and expression" under and below /dir/to/search/ | find /dir/to/search/ -type f -name 'expression -and expression' -print |
Find all *.txt files of user Tecmint under /home directory | find /home -user tecmint -iname "*.txt" |
Delete recursively empty files named 'bad' | find . -name bad -empty -delete |
Remove files cart4, cart5, cart6 in directory ~/junk | find ~/junk -name 'cart[4-6]' -exec rm {} \; |
find all regular files exclude .o and exclude *.swp and output line number of soc_attach if it has | find . \( ! -path "./output/*" \) -a \( -type f \) -a \( ! -name '*.o' \) -a \( ! -name '*.swp' \) | xargs grep -n soc_attach |
find all the files in current directory of size exactly 6MB. | find . -size 6M |
Execute awk script "script.awk" that exists in "$PATH" with argument "arg1" | awk -f `which script.awk` arg1 |
Display in an optimized way file status for all regular files in the current directory tree suppressing error messages | time find . -type f -exec stat {} + > /dev/null |
display the number of lines in all the ".c" files in the current folder | find . -name "*.c" -print | xargs wc -l |
display all the directories in the current folder which start with processor followed by digit and ends with .1 or .2 | find . -type d -regextype posix-egrep -regex '\./processor[[:digit:]]*/10\.' |
Find all *.p[lm] files under /users/tom directory that matches both the regex '->get(' and '#hyphenate' in their contents | find /users/tom -name '*.p[lm]' -exec grep -l -- '->get(' {} + | xargs grep -l '#hyphenate' |
Print the sorted unique column of usernames of users who are currently logged in without the header | finger | cut -d ' ' -f1 | sort -u | grep -iv login |
Search for files specifying the minimum depth of the search | find -mindepth num -name query |
Find all *.coffee files under /some/path and run 'perl /path/to/your/program' with all of the file paths as its arguments | find /some/path -name '*.coffee' -print0 | xargs -0 perl /path/to/your/program |
Find all files/directories under current directory following symlinks if needed | find -L |
Find a 400 permission file under /data directory | find /data -type f -perm 400 -print -quit |
change owner of the file process to user root | sudo chown root process |
Find all files under current directory with their size and paths, reverse sort them numerically, then print the first 4 entries by removing all matches to the regex [0-9]+\s from each line of the output | find -type f -printf "%s %p\n" | sort -nr | head -n 4 | sed -r 's/[0-9]+\s//g' |
Print all filenames in /usr/src except for those that are of the form '*,v' or '.*,v' | find /usr/src -not \( -name "*,v" -o -name ".*,v" \) '{}' \; -print |
create an archive using pbzip2 as a compress program | tar -I pbzip2 -cf OUTPUT_FILE.tar.bz2 paths_to_archive |
find all the files in the current directory and sub-directories whose status was changed after /etc/fstab was modified | find -cnewer /etc/fstab |
Find all *stat files/directories under /usr | find /usr -name *stat |
Recursively change the owner and group of all files in "/your/directory/to/fuel/" to "nginx" | chown nginx:nginx /your/directory/to/fuel/ -R |
find all the files in the file system which have sticky bit enabled to the user | find / -perm -u+s |
explicitly list all files in the current directory | find . -print |
Find all files/directories in entire file system with 644 permission | find / -perm 644 |
Find files modified in the last 5 minutes starting from the current directory | find . -mmin -5 |
Print a detailed list of all files under and below the two directories given as variables $FULFILLMENT and $ARCH1 | find $FULFILLMENT $ARCH1 -exec stat -c '%i,%b,%A,%h,%U,%G,%y,%n' {} \; |
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