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Count total number of lines in all *txt files in current directory | wc -l `find . -type f -name '*.txt' ` |
search in the current folder for all the regular/normal file with the name "test" | find . -type f -name test |
Search for "pattern" in all the .c files in the current directory tree | find . -name "*.c" | xargs grep pattern |
Find files with name `aaa.txt' under the current directory | find . -name aaa.txt |
Unzip every ".gz" file in the current directory tree | find . -name "*.gz" | xargs gunzip |
Make directories to "/tmp/test/blah/oops/something" as needed | mkdir -p /tmp/test/blah/oops/something |
Search the current directory tree for regular files lacking read permissions for user, group, or others | find . -type f ! -perm -444 |
List *.pl directories in the current directory tree | find . -name "*.pl" -exec ls -ld {} \; |
Search for hidden files non-recursively | find . -name '.?*' -prune |
List all files/directories under current directory | find . |
Delete all .svn files/directories under current directory | find . -name .svn -delete |
Calculate the md5 sum of every ".py" file in directory tree "/path" | find /path -type f -name "*.py" -exec md5sum "{}" +; |
Search for 'stuff' in all *,txt files under current directory | find . -name "*.txt" -print0 | xargs -0 egrep 'stuff' |
Remove all files in the ~/backups/mydatabasename directory recursively that were last modified more than 30 days ago | find ~/backups/mydatabasename/* -mtime +30 -exec rm {} \; |
Change the encoding of all *.java files in a directory and subdirectories from cp1252 to utf-8 | find . -type f -name '*.java' -exec sh -c 'iconv -f cp1252 -t utf-8 "$1" > converted && mv converted "$1"' -- {} \; |
find all the files in the file system which belong to the user "pat" and with the name "dateiname" | find / -user pat -iname "Dateiname" |
Find "file.xml" under the current directory and change directory to its parent | cd `find . -name file.xml -exec dirname {} \;` |
List all regular files in the current directory tree | find . -type f | xargs ls -l |
Delete all regular files that have not been modified in the last 31 days under '/path/to/junk/files' directory tree | find /path/to/junk/files -type f -mtime +31 -exec rm -f {} \; |
Find all files/directories under '/var/tmp' directory tree that belong to a user with user id 1000 | find /var/tmp -uid 1000 |
find files in /usr directory which are modified after February 1 of the current year | find /usr -newermt "Feb 1" |
Recursively set all permissions under "/directory" to 755 | chmod -R 755 /directory |
Prints date of first Tuesday in January, 2015 | cal 01 2015 | sed -n '1,2b;/^.\{6\} \{0,1\}\ .*/ {s//0\1/;s/.*\$/\1/p;q;}' |
Login in 'whatever.com' as user 'whoever' with X11 forwarding to enable GUI programs on remote to be run | ssh -X [email protected] |
create directory TestProject | mkdir TestProject |
Delete current cron job list, and use those in yourFile.text | crontab yourFile.text |
Find the top 25 files according to their size in the current directory and its subdirectories | find . -type f -exec ls -al {} \; | sort -nr -k5 | head -n 25 |
Rename uppercase file or folder name $1 to lower case name | mv $1 `echo $1 | tr '[:upper:]' '[:lower:]'` |
search for all non empty regular/normal files in the current folder and empty them ie., delete the content not the file | find . -type f -maxdepth 1 -not -empty -print0 | xargs -0i cp /dev/null {} |
Search the /usr/local/doc directory tree for .texi files | find /usr/local/doc -name '*.texi' |
Find files/directories with inode number '212042' under '/var' directory tree without traversing other devices/partitions | find -x /var -inum 212042 |
Alias "cd $" as "cd-" | alias cd-='cd $' |
Print the list of the subdirectories of the current directory | find . -mindepth 1 -maxdepth 1 -type d -printf "%P\n" |
Rename all .jpg files to .jpeg under the current directory and below | find | rename 's/\.jpg$/.jpeg/' |
Prints folder where current script is located | echo "dirname: `dirname "$0"`" |
Find every file under the directory /usr ending in ".stat". | find /usr -name *stat |
Print the list of 1st level subdirectories in /fss/fin | find /fss/fin -d 1 -type d -name "*" -print |
List all environment variables whose name either equals HOME or PATH, or starts with GO | env | grep '^\' |
display all the text files in current folder | find . -name "*.txt" -printf "%f\n" |
find all js files under the build direcotry except build/external directory. | find build -not \( -path build/external -prune \) -name \*.js |
Recursively from current folder searches only files that names match ".*xxx" pattern, ignores binary files and prints file name before every string that contains "my Text to grep". | grep --include="*.xxx" -nRHI "my Text to grep" * |
Make directory "destdir" | mkdir destdir |
List the full path of each directory under the current working directory | tree -dfi "$(pwd)" |
Archive the directory structure under backup directory into directory-structure.tar | find backup/ -type d | xargs tar cf directory-structure.tar --no-recursion |
Send SIGKILL signal to processes ID 18581, 18582, and 18583, killing them instantly. | kill -9 18581 18582 18583 |
Send SIGTERM signal to entire session of processes containing process whose ID is 21709. | kill $(ps -o pid= -s $) |
Find all files/directories with 644 permission in entire file system | find / -perm 644 |
Run /bin/true with 1 to 99999 as arguments | /bin/sh -c "/bin/true $" |
Remove trailing white spaces from all files under current directory ignoring .git and .svn directories | find . -not \ -type f -exec sed -i "s/[[:space:]]*$//g" "{}" \; |
Calculate the sum of the 7th column of "ipcs -mb" | ipcs -mb | awk 'NR > 3 { print $7 }' | paste -sd+ | bc |
Find files matching pattern $2 in the $1 directory recursively and search them for text $3, where $1, $2, $3 are the command line arguments to the Bash script | find $1 -path /proc -prune -o -name "$2" -print -exec grep -Hn "$3" {} \; |
Print only lines from 'file1.txt' that not present in 'file2.txt' and beginning with 'Q' | cat file1.txt | grep -Fvf file2.txt | grep '^Q' |
display all the files in current folder which have been changed in the last 24 hours | find . -ctime -1 -print |
Print shared lines in "number.txt.gz" and "xxx.txt.gz" | zcat number.txt.gz | { zcat xxx.txt.gz | comm -12 /dev/fd/3 - ; } 3<&0 |
find ".flac" files in current folder using regular expressions | find ./ -regex "./cmn-.\.flac" |
Enables shell option 'direxpand'. | shopt -s direxpand |
Prints full path to files with dot in name in a current folder. | ls -d -1 $PWD/*.* |
Print sed commands that would replace all occurrences of 'previousword' with 'newword' in all regular files with '.cpp' extension under '/myprojects' directory tree | find /myprojects -type f -name '*.cpp' -print0 | xargs -0 echo sed -i 's/previousword/newword/g' |
Search the current directory recursively for regular files with extensions sdw, sdc, sdd and save the search result as "list_1" | find . -type f | egrep '$' > list_1 |
Replace all spaces (' ') with comma (',') in ${TO_IGNORE[@]}, append with '--ignore ' and save the resultant string to variable 'ARGS' | ARGS="--ignore `echo ${TO_IGNORE[@]} | tr ' ' ','`" |
display all scala files in the directory "src/main" | find . -type f -regex ".*src/main.*\.scala$" |
Search in current directory downwards all files whose size is 10 bytes ( Characters ) . | find . -size 10c -print |
Case-insensitive search for "error" in file report.txt, display one page at a time, waiting for user interaction between each. | cat report.txt | grep -i error | more |
Find all files named "something" in the current folder and below and run them through the ls -l command in a one batch. | find . -name something | xargs -0 ls |
Display the file type description of /bin/bash, ie. symbolic link, ELF executable, etc. | $ file /bin/bash |
Print fourth column of data from text file text.txt where columns separated by one or more whitespaces. | cat text.txt | tr -s ' ' | cut -d ' ' -f4 |
Find all directories under current directory and change their permission to 644 | find -type d -print0|xargs -0 chmod 644 |
Find all files/directories with '.log' extension whose names start with 'app-', have been modified in the last 5 minutes and show the first one found | find /var/log/crashes -name app-\*\.log -mmin -5 -print | head -n 1 |
Delete all .bam files in the current directory tree | find . -name "*.bam" | xargs rm |
Find the directories whose pathnames contain "New Parts" at level 3 of the current directory tree and create symlinks to them in /cygdrive/c/Views | find -mindepth 3 -maxdepth 3 -type d | grep "New Parts" | tr '\012' '\000' | xargs -0 ln -s -t /cygdrive/c/Views |
Find all files in ~/clang+llvm-3.3/bin/ and print 'basename /file/path' for each file | find ~/clang+llvm-3.3/bin/ -type f -exec echo basename {} \; |
Change every directory under "/var/www/html/" to have permissions 775 | sudo find /var/www/html/ -type d -exec chmod 775 {} \; |
display a long listing of all the directories in the current folder | find . -type d -exec ls -algd {} \; |
Find all files under $source_dir that match the regex .*\.\(avi\|wmv\|flv\|mp4\) in their paths and print them with null character as the delimiter | find "$source_dir" -type f -regex ".*\.\(avi\|wmv\|flv\|mp4\)" -print0 |
find files in the home folder which have been modified in the last day. ( -daystart measures times from the beginning of today rather than from 24 hours ago.) | find ~/ -daystart -type f -mtime 1 |
Find all 0644 permission files/directories under current directory tree and show only the first 10 of them | find . -perm 0644 | head |
Find *log files/directories within a maximum of 3 levels of directories | find / -maxdepth 3 -name "*log" |
Create a symbolic link named "foo" to "/var/cache/apt/archives/bash_4.3-14ubuntu1_amd64.deb" | ln -s /var/cache/apt/archives/bash_4.3-14ubuntu1_amd64.deb foo |
Print the current shell | ps | tail -n 4 | sed -E '2,$d;s/.* (.*)/\1/' |
find all the directories in current folder which start with test | find . -type d -name "test*" |
Removes all files like '*.bak' in a current folder, and prints messages about what is being done. | rm -v *.bak |
find all the files ending with "clj" in the current folder and search for a pattern | find . -name *.clj | xargs grep -r resources |
List and sort all leaf directories under current directory | find . -type d | sort | awk '$0 !~ last "/" {print last} {last=$0} END {print last}' |
List all files and directories in long list format with a time style of "long-iso" and sort from oldest modifed to newest modified | ls -l --time-style=long-iso | sort -k6 |
Replace all newlines from standard input except the last with spaces | sed 'x;G;1!h;s/\n/ /g;$!d' |
Rename "original.filename" to "new.original.filename" | mv {,new.}original.filename |
Finds and deletes all empty folders . | find ./ -type d -exec rmdir --ignore-fail-on-non-empty {} 2>/dev/null \; |
List all .jpg files in the home directory tree | find . -name "*.jpg" -exec ls {} \; |
Print the basename from a colon separated path 'a:b:c:d:e' | basename $(echo "a:b:c:d:e" | tr ':' '/') |
Locate all passwd files on the system | find / -name passwd |
Find all files and directories in the current directory tree with "linkin park" in their names and copy them to /Users/tommye/Desktop/LP | find . -iname "*linkin park*" -exec cp -r {} /Users/tommye/Desktop/LP \; |
Find all files in /home/user/ that were created or changed 10 minutes ago | find /home/user/ -cmin 10 -print |
removes the 4th-from to 6th-from last lines in file | tac filename | sed 4,6d | tac |
Print the path names of all .png files in the /home/kibab directory tree | find /home/kibab -name '*.png' -exec echo '{}' ';' |
get all the files that have been modified within the last 30 days | find . -mtime -30 -print |
Find all files and directories with permissions 664 | find . -perm 664 |
Find files/directories named 'foo' in the current partition of the root filesystem | find -x / -name foo |
find all the files ending with "mkv" in current folder | find -name "*.mkv" |
change the permissions of all the normal files in a directory | find /path/to/dir/ -type f -print0 | xargs -0 chmod 644 |
Copy file "exist" from directory "/file/that" to a new file named "file" in "/location/for/new" | cp /file/that/exists /location/for/new/file |
Subsets and Splits