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387
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List all files/folders in current directory by separating them with spaces | ls | tr "\n" " " |
Remove all *.mp3 files in tmp directory but not in it's subdirectories | find tmp -maxdepth 1 -name '*.mp3' -maxdepth 1 | xargs rm |
Find all files excluding *.gz files in the current directory tree and compress them with gzip | find . -type f ! -name '*.gz' -exec gzip "{}" \; |
Decompress and extract 'libxml2-sources-2.7.7.tar.gz' | gzip -dc libxml2-sources-2.7.7.tar.gz | tar xvf - |
Recursively remove all "*.txt" files and answer "y" to any prompt | yes | rm -r *.txt |
Compress in parallel regular files in the current directory tree that were last modified more than 7 days ago | find . -type f -mtime +7 | tee compressedP.list | xargs -I{} -P10 compress {} & |
print all lines after the last match of 'string match' | tac infile | sed '/string match/,$d' | tac |
display all the files in the current folder | find . |
Print the list of regular files from the current directory that were last modified on November, 22 | find . -maxdepth 1 -type f -newermt "Nov 22" \! -newermt "Nov 23" -exec echo {} + |
Find writable files in the current directory tree | find . -writable |
Find all symbolic links under '/some/directory' driectory tree | find /some/directory -type l -print |
Archive directory "/mnt/data" to "/media/WD_Disk_1/current_working_data/", deleting any extraneous files in destination, compress data during copy. | rsync -az --delete /mnt/data/ /media/WD_Disk_1/current_working_data/; |
Recursively change the group of all files in "/var/lib/php/session" to "lighttpd" | chown -R :lighttpd /var/lib/php/session |
find all the files in the file system which belong to the user "pat" and with the name "dateiname" | find / -user pat -iname "Dateiname" |
Back up all *.txt files/directories in new files/directories with a .bak extension in their names under /etc directory | find /etc -print0 -name "*.txt" | xargs -I {} -0 mv {} {}.bak |
Make all regular files in the current directory tree world-readable | find . -type f -print0 | xargs -0 chmod go+r |
Find all *.htm files under current directory and print the changed names by appending 3 levels of parent directory names at the beginning and modifying the actual name to dd-nnn format | find -type f -name "*.htm" | sed 's@^./@@g;s@/@-@g' | awk -F'-' '{print $1 "-" $2 "-" $3 "-" substr($4, 5, 2) "-" $5}' |
Overwirte file '/path/to/your/file' with zeroes and remove, showing progress while execution. | shred -v -n 0 -z -u /path/to/your/file #overwriting with zeroes and remove the file |
Find all status.c files in the current directory tree and show stat's information on them | find . -name status.c -exec stat --format "%A %s %x %n" {} \; |
Print the average round trip time of 5 pings to "google.com" from OSX | ping -c 5 google.com | grep "round-trip" | cut -f 5 -d "/" |
Print linker search path using gcc formatted on new lines | gcc -print-search-dirs | sed '/^lib/b 1;d;:1;s,/[^/.][^/]*/\.\./,/,;t 1;s,:[^=]*=,:;,;s,;,; ,g' | tr \; \\012 |
find all the files in the home folder which are less than 42 Bytes | find / -size 42 |
Find directories modified within the last 7 days | find . -mtime -7 -type d |
run command "createdb $DBNAME" as user postgres | su --login postgres --command "createdb $DBNAME" |
search for text files in the current folder which have write access to others | find . -type f \( -iname "*.txt" -and -perm -o=w \) |
Delimit standard input with ":" and display as a table | column -s: -t |
Grab the output of "basename" (in this case "stuff") and echo it to stdout, which basename would do by default anyway. | echo $(basename /foo/bar/stuff) |
find all the text files in current folder and change the extension of these files and move them to another folder | find . -name "*.txt" | parallel 'ext="{/}" ; mv -- {} foo/{/.}.bar.${ext##*.}' |
Isolate first comma-delimited field of each line in "file", discard consecutive duplicates, and search "file" for first matching occurrence of that field. | cut -d, -f1 file | uniq | xargs -I{} grep -m 1 "{}" file |
find all js files under the build direcotry except build/external directory. | find build -not \ -name \*.js |
Rename "svnlog.py" to "svnlog" | mv svnlog.py svnlog |
Display a binary file as a sequence of hex codes | od -t x1 file|cut -c8- |
Finds real time report in a 'sleep 1' command execution statistic. | { time sleep 1; } 2>&1 | grep real |
delete all the broken symbolic links from the folder /usr/ports/packages | find -L /usr/ports/packages -type l -exec rm -- {} + |
Gets MAC address of en0 network interface. | ifconfig en0 | grep -Eo ..\(\:..\){5} |
List files greater than 1024KB under /path/to/directory and print the time and size on stdout | find /path/to/directory -type f -size +1024k -exec ls -lh {} \; | awk '{ print $8 ": " $5 }' |
Split "your_file" into files with at most 9 lines each | split -l9 your_file |
Force create a symbolic link named "mylink" with target "/apps/myapps/new/link/target" | ln -f -s /apps/myapps/new/link/target mylink |
Append the current user to the server access control list for X | xhost +si:localuser:`whoami` |
Search the current directory tree for files whose name is ".note", case insensitive | find -type d -exec find {} -maxdepth 1 \! -type d -iname '.note' \; |
search for the word "put" in all the files in the current folder which have the word "bills" in their name and display the matched line along with the filename. | find . -name '*bills*' -exec grep -H "put" {} \; |
Search the directories matching pattern "/path/to/some/dir/*[0-9]" for level 1 subdirectories | find /path/to/some/dir/*[0-9] -type d -maxdepth 1 |
find all regular files then display the number of occurrences of banana without lines not proper end | find . -type f -print0| xargs -0 grep -c banana| grep -v ":0$" |
display all text files in the current folder | find . -type f -name "*.txt" |
find all hidden files in the current folder which have been modified after profile file | find . -type f -name ".*" -newer .cshrc -print |
Read a line from standard input into variable "ENTERED_PASSWORD" without echoing the input | read -s ENTERED_PASSWORD |
Find the largest 10 files (regular files) under current directory | find . -type f -print0 | xargs -0 du | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {} |
Saves exit statuses of piped commands in a system variable PIPESTATUS=' | false | true |
print bindings for "p" and "e" with no case sensitivity | bind -p|grep -i '"[pE]"' |
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 ".gz" files in directory tree "files/" and use a count and the filename as arguments to "..." | find files/ -name "*.gz" | nl -n rz | sed -e 's/\t/\n/' | xargs --max-args 2 ... |
Create a symbolic link named "$SYMLINK" to "$ACTUAL_DIR" | ln -s "$ACTUAL_DIR" "$SYMLINK" |
Calculate the md5 checksum of the current directory structure and save it in variable SUM | SUM=$ |
Print file extension assuming there is only one dot in the file name. | echo "$FILE" | cut -d'.' -f2 |
find all the foo.txt files in the current folder and move them to another directory | find . -name "foo.txt" | awk '{ print "mv "$0" ~/bar/" | "sh" }' |
Find all empty folders in the current directory and below | find . -type d -empty |
Find symbolic links in /usr/lib and /usr/lib64 to files whose pathnames contain "libstdc++" | find /usr/lib/ /usr/lib64/ -lname "*libstdc++*" |
Remove all files with names like "vmware-*.log" from the current directory tree | find . -name vmware-*.log | xargs rm |
Find all files named 'file' in 1 level down the current directory whose status were changed more than 1 hour ago | find . -maxdepth 1 -cmin +60 -name file |
Search "inputfile" for lines starting with "t:" and group the results in files with at most 200 lines each | cat inputfile | grep "^t\:" | split -l 200 |
Find all files/directories under /var/www/some/subset and change their owner and group to www-data | sudo find /var/www/some/subset -print0 | xargs -0 chown www-data:www-data |
Finds recursively all files having extension .c, .h in '/path/' that contain 'pattern', and prints matched strings with string number and file name. | grep --include=\*.{c,h} -rnw '/path/to/somewhere/' -e "pattern" |
delete all the empty file in the file system after user confirmation | find / -size 0 -ok rm { } \; |
Find all regular files residing in the current directory tree and search them for string "/bin/ksh" | find . -type f -print | xargs grep -i 'bin/ksh' |
Count number of A records of domain '$domain' on nameserver '$server' and save value in 'result' variable | result="$(dig +short @"$server" "$domain" | wc -l)" |
Find all files/directories under current directory that were accessed less than 1 day ago | find . -atime -1 -print |
search for the word "foo" in all the regular/normal files with the name "file-pattern" in the directory "/path/to/dir" | find /path/to/dir/ -type f -name "file-pattern" -print0 | xargs -I {} -0 grep -l "foo" "{}" |
Print the contents of "n" | cat n |
Find all *blue* files/directories under /myfiles | find /myfiles -name '*blue*' |
Find all files under current directory matching the posix-egrep type regex '^.*/[a-z][^/]*$' in their names with locale set to default C locale | LC_ALL=C find . -regextype posix-egrep -regex '^.*/[a-z][^/]*$' -type f |
Find all *.txt files/directories under current directory and execute process once with all of them as arguments | find . -name \*.txt -exec process {} + |
find all the html files which are modified in the last 7 days | find . -mtime -7 -name "*.html" |
Gets list of IP addresses of all network interfaces. | ifconfig | sed -En 's/127.0.0.1//;s/.*inet ?({3}[0-9]*).*/\2/p' |
Print appended data in "/var/log/syslog" as the file grows | tail -f /var/log/syslog |
find files in home directory that accessed more than 100 days ago | find ~ -atime 100 |
Print all unique directory paths under "dir1" compared to "dir2" | comm -23 <(find dir1 -type d | sed 's/dir1/\//'| sort) <(find dir2 -type d | sed 's/dir2/\//'| sort) | sed 's/^\//dir1/' |
Find and the 5 largest regular files in the Downloads folder of tecmint's home directory and output the file sizes in bytes. | find /home/tecmint/Downloads/ -type f -printf "%s %p\n" | sort -rn | head -n 5 |
Search for all files with same inode NUM | find . -inum NUM |
display all the directories in the folder /var and do not go beyond 2 levels during search | find /var -maxdepth 2 -type d; |
Print a sorted list of all .jpg files in the current directory and below | find -name '*.jpg' | sort -n |
Save full path of command "tr" to variable "TR" | TR=`which tr` |
find all files in the entire file system whose size is more than 100MB | find / -size +100M |
Recursively copies all files in the current directory but ones that names match pattern "dirToExclude|targetDir" to the 'targetDir' directory, printing info message on each operation. | cp -rv `ls -A | grep -vE "dirToExclude|targetDir"` targetDir |
Print '"HTTP/1.1 200 OK', two new lines and the current date | echo -e "HTTP/1.1 200 OK\n\n $" |
Prints process tree of a current process with id numbers and parent processes. | pstree -sp $$ |
run bash in screen and source a file before printing the prompt | screen bash --rcfile yourfile.rc |
Display a long listing of all the regular files under current directory tree that are newer than ‘Apr 18 23:59:59 EDT 2013’ and older than ‘Apr 20 00:00:00 EDT 2013’ by modification time | find . -type f -newermt ‘Apr 18 23:59:59 EDT 2013’ ! -newermt ‘Apr 20 00:00:00 EDT 2013’ -exec ls -l ‘{}’ \; |
Count the number of users logged in minus one | who | sed 1d | wc -l |
compresses all the files in the current folder with default depth | find . -depth -print | cpio -dump /backup |
Search the system for directories named "needle" | find / -type d -name "needle" |
Executes tmux commands that are stored in the '$tmux_command' variable, and then attaches to the tmux session. | tmux "$tmux_command \; attach" |
Save the contents of "numbers.txt" to variable "f" | f=$ |
Search the current directory and all subdirectories for files that have 777 permissions and the permissions to 755 | find . -type f -perm 777 -exec chmod 755 {} \; |
Repeat "image.png" 10 times on a single line | echo $ |
Removes empty folder, and hides error message if one is not empty. | rmdir --ignore-fail-on-non-empty $newBaseDir/Data/NewDataCopy |
Processes all files recursively in /var/spool/cron/tabs folder and filters out all strings with '#'. | grep -v "#" -R /var/spool/cron/tabs |
create a symbolic link named "test" to file ".bashrc" | ln -s .bashrc test |
Find all the files in entire file system which are accessed 50 days back | find / -atime 50 |
Find files with group write permission and remove the permission | find . -perm -20 -print | xargs chmod g-w |
Find all the SGID bit files whose permissions set to 644 | find / -perm 2644 |
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