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change the group of all the files in the folder /u/netinst/ to staff | find /u/netinst -print | xargs chgrp staff |
Find all files called "INPUT.txt" in the current directory tree and remove lines starting with # in them, saving backup copies as INPUT.txt.bak | find . -type f -name INPUT.txt -print0 | xargs -0 -I {} sed -i.bak '/^#/d' {} |
Wrap each line in "file.txt" to fit in 76 characters breaking only at spaces and indent the output | fold -w 76 -s file.txt | pr -T --indent=4 |
Remove the .jpg files from the current directory whose names match regular expression ".+-[0-9]+x[0-9]+\.jpg" | find . -type f -regex ".+-[0-9]+x[0-9]+\.jpg" -exec rm -rf {} \; |
Finds recursively all files in '/path/' that contain 'pattern', and prints matched strings with string number and file name. | grep -rnw '/path/' -e 'pattern' |
set alias "ff" for command "find . -name $1" | alias ff=find . -name $1 |
Find all file which have more the 2 hard link | find . -type f -links +2 -exec ls -lrt {} \; |
Remove trailing whitespaces in TXT files from the current directory tree | find . -iname '*.txt' -type f -exec sed -i '' 's/[[:space:]]\{1,\}$//' {} \+ |
Search for file names with "bad" characters in the current directory and delete the files. | find . -name '*[+{;"\\=?~()<>&*|$ ]*' -maxdepth 0 -exec rm -f '{}' \; |
Find all files changed on the 29th of September, 2008, starting from the current directory | find . -type f -newerct 2008-09-29 ! -newerct 2008-09-30 |
Print newline, word, and byte counts of each '*.java' file within current directory, and total newline, word, and byte counts | find . -name \*.java | tr '\n' '\0' | xargs -0 wc |
split file "${fspec} into pieces named as "xyzzyNNN" with numeric prefix from 1 to 6 | split --number=l/6 ${fspec} xyzzy. |
search for the word LOG in all the files in the folder ~/jsmith | find ~jsmith -exec grep LOG '{}' /dev/null \; -print |
Make a copy of file.txt in all directories in current directory - names may not contain spaces. | ls -d */ | xargs -iA cp file.txt A |
Search for Subscription.java under current directory, and go to directory containing it. | cd "$" |
Resolve symbolic link of file "/foo/bar/baz" | readlink -e /foo/bar/baz |
Read 10 bytes from $0 and print them by replacing the set '\000-\377' with '#' | head -c 10 "$0" | tr '\000-\377' '#' |
Exits from login shell. | logout |
recursively change owner of the directory /usr/local/lib to the current user | sudo chown -R `whoami` /usr/local/lib |
display the names without extensions of all the data files in current folder which have not been changed in the last 60 mins | find ./ -name "*.dat" -type f -cmin +60 -exec basename {} \; |
extract archive stored in $1 | tar -zxvf $1 |
Remove the .jpg files from the current directory whose names match regular expression ".+-[0-9]+x[0-9]+\.jpg" | find . -type f -regex ".+-[0-9]+x[0-9]+\.jpg" | xargs rm |
display all the regular files in the current folder that are exactly 10KB | find . -type f -size 10k |
Prints long listing of the current directory, sorted from oldest to newest, with appended indicators. | $ ls -Fltr |
find all read me files in a folder | find /usr/share/doc -name README |
Extract 8 bytes as an unsigned integer that is "$o" offset into "$rpm" | set `od -j $o -N 8 -t u1 $rpm` |
Prints a random number between 1 and 10 | grep -m1 -ao '[0-9]' /dev/urandom | sed s/0/10/ | head -n1 |
rename all the png files to jpg files in the current fodler | find . -name "*.png" -print0 | sed 'p;s/\.png/\.jpg/' | xargs -0 -n2 mv |
Move all files not matching "Tux.png" in "~/Linux/Old" to "~/Linux/New/" using zsh with "EXTENDED_GLOB" | mv ~/Linux/Old/^Tux.png ~/Linux/New/ |
Merge each line in "file" into a single comma separated line | paste -d, -s file |
Format space separated fields in "filename" as a table | column -t -s' ' filename |
search for the word "slrn" in all the files in the folder $HOME/html/andrews-corner | find $HOME/html/andrews-corner -exec grep -q 'slrn' '{}' \; -print |
Find and show all files in the current directory tree that are smaller than 500 kB | find . -size -500k |
Create 1000 files each file having a number from 1 to 1000 named "file000" to "file999" | seq 1 1000 | split -l 1 -a 3 -d - file |
Convert *.au files to *.wav files using `sox' | find -type f -name '*.au' | awk '{printf "sox %s %s\n",$0,$0".wav" }' | bash |
Prints $m latest modified files within the $d folder, using $f format for printing timestamp. | find "$d" -type f -printf "%T@ :$f %p\n" | sort -nr | cut -d: -f2- | head -n"$m" |
count amount of jobs running | jobs | wc -l |
Find all files under $d directory that are executable by owner and print only their names | find $d -maxdepth 1 -perm -100 -type f | sed 's#.*/##' |
Print each line that is found only once in "file1" and "file2" combined | sort file1 file2 | uniq -u |
Find every JavaScript file in the wordpress directory tree | find wordpress -name '*js' |
Filnd all files in root directory with 777 permission and change permision 644 with chmod commad . | find / -type f -perm 777 -print -exec chmod 644 {} \; |
Search the first 300 commands in history containing "scp" and ending in "important" | history 300 | grep scp | grep important$ |
delete all the empty directories in the current folder | find . -type d -empty -exec rmdir {} \; |
change permissions of all the script files in a directory | find /home/john/script -name "*.sh" -type f -exec chmod 644 {} \; |
force remove all the directories with the name logs in the folder /var/www | find /var/www -type d -mtime 0 -name logs -exec sudo rm -fr {} \; |
Find all files named "file.ext" in the current directory tree and print the path names of the directories they are in | find . -name "file.ext" -execdir pwd ';' |
Find one file or directory in the current directory whose name matches the pattern given as a variable $a | find . -maxdepth 1 -name "$a" -print -quit |
find files in current directory that names are game | find . -name game |
Gets IP address of ${NET_IF} network interface. | NET_IP=`ifconfig ${NET_IF} | grep -Eo 'inet ?{3}[0-9]*' | grep -Eo '{3}[0-9]*' | grep -v '127.0.0.1'` |
Creates 5-letter random file name and saves it in 'rand_str' variable. | rand_str="$" |
Rename all *.txt regular files in the current directory tree to *.abc | find . -type f -iname '*.txt' -print0 | xargs -0 rename .txt .abc |
find the type of all the regular/normal files in the current folder | find . -type f | xargs file |
find all txt files under the current folder except ./misc folder | find . -path ./misc -prune -o -name '*.txt' -print |
Find files/directories named<filetype> under current directory which were accessed less than 5 days ago | find -name "<filetype>" -atime -5 |
Continuously write "UUUUUUUUUUUUUUUUU" without newlines to "/dev/to/overwrite" | yes 'UUUUUUUUUUUUUUUUU' | tr -d '\n' > /dev/to/overwrite |
Find all *.py files/directories under dir directory ignoring .git path | find dir -not -path '.git' -iname '*.py' |
Find strings with 'Features' in /var/run/dmesg.boot' file | cat /var/run/dmesg.boot | grep Features |
Make directories to "$TARGET_PATH" as needed without causing an error if it exists | mkdir -p "$TARGET_PATH" |
Compress .log files in /var and below on an individual basis | find /var -iname \*.log -exec bzip {} \; |
create a symbolic link named "test" to file ".bashrc" | ln -s .bashrc test |
Return all of the .conf files in Pat's user folder and subdirectories | find /home/pat -iname "*.conf" |
Print full path of command "python" | which python |
find all CSS files that do something with your HTML ID #content | find . -name "*.css" -exec grep -l "#content" {} \; |
Format file "list-of-entries.txt" with no column delimiter | column -t -s '' list-of-entries.txt |
Print lines containing string TEXT from all log files in the current directory. | grep -e TEXT *.log | cut -d':' --complement -s -f1 |
search for files which are writable by both their owner and their group | find . -perm -220 |
Filters out all comments from the output of the command "crontab -u $user -l" ignoring errors | crontab -u $user -l 2>/dev/null | grep -v '^#' |
display a list of all regular/normal files in the current folder | find . -type f -ls |
search for the regular/normal file "myfile" in the current folder excluding search in the paths of "work" and "home" sub directories | find . \ -prune -o -name myfile -type f -print |
Print your/dir if it's empty | find your/dir -prune -empty |
Replaces any occurences of '*favicon.ico*' in any subfolder with file '/root/favicon.ico'. | find . | grep favicon\.ico | xargs -n 1 cp -f /root/favicon.ico |
display all pdf files in the current folder | find . -name *.pdf |
Filter contents of 'file' through awk commands written in script.awk, display the result. | awk -f script.awk file |
Find files that are 100k | find -size 100k |
Find all empty files in the current directory and delete them | find . -type f -maxdepth 1 -empty -print0 | xargs -0 /bin/rm |
replace the word foo to bar in the current folder in all the regular/normal files containing the word "baz" in their name (does not update the file) | find . -type f -name "*baz*" -exec sed -i 's/foo/bar/g' {} + |
Find all files owned by group `group2' | find / -group group2 |
Prefix all files and folders in the current directory with "PRE_" | ls | xargs -I {} mv {} PRE_{} |
List all files/directories under current directory | find . -print |
Silently read standard input until the escape key is pressed ignoring backslash escapes and using the prompt $'Press escape to continue...\n' | read -rsp $'Press escape to continue...\n' -d $'\e' |
display all directories in the folder "$ORIG_DIR" | find "$ORIG_DIR" -name "*" -type d |
Force create a symbolic link without dereferencing named "mylink" to "dir2" | ln -nsf dir2 mylink |
Lists file descriptors of a current process. | ls -l /proc/self/fd/ |
search for a word in all the php files in the current folder and display the count of all matching lines. | find . -name \*.php -type f -print0 | xargs -0 -n1 grep -Hn '$test' | wc -l |
Print a count of each unique line from standard input | sort | uniq -c |
Report total file systems disk usage estimated in terabytes | df --total -BT | tail -n 1 |
Displays status of currently active network interfaces. | ifconfig |
Search all files in the current directory tree for "SearchString", ignoring .html files and skipping .svn directories | find . \ | xargs -d '\n' grep -Hd skip 'SearchString' |
list all regular files which path is not dir1 or dir2 | find ! -path "dir1" ! -path "dir2" -type f |
Generate UUIDs for the files from the current directory tree | find . -exec printf '%s\t' {} \; -exec uuidgen \; | awk -F '\t' '{ sub; print $2, $1 }' | sort -k2 |
change the owner of the files which belong to the group 1000 to username and modify only the symbolic link not the originally pointed file | find -gid 1000 -exec chown -h :username {} \; |
Find all hidden files under /tmp | find /tmp -type f -name ".*" |
Remove all *.tmp files from the /tmp directory tree | find /tmp -name "*.tmp" -print0 | xargs -0 rm |
find all the files in the current folder which have the word cache in them and do not search in the sub directories of the folder. | find . -name 'cache*' -depth -exec rm {} \; |
create archive "backup.tar.gz" from /path/to/catalog | tar czfP backup.tar.gz /path/to/catalog |
find all the files in the home folder which have been modified after a file | find $HOME -newer ~joeuser/lastbatch.txt |
Print common lines in "file1" and "file2" | comm -12 file1 file2 |
Search the *.pdf files from directory tree PDFs/ for text "perry sound", ignoring the case | find PDFs/ -name '*.pdf' -exec sh -c 'pdftotext "{}" - | grep -i --with-filename --label="{}" --color "perry sound"' \; |
Execute "cat /tmp/iostat.running" every 10 seconds | watch -n10 cat /tmp/iostat.running |
Create a symbolic link in the current directory for each file under the directories matching "../[12][0-9][0-9]" | find ../[12][0-9][0-9][0-9] -type f -exec ln -s {} \; |
Subsets and Splits