nl_command
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display long listing of all the files that have been changed in the last 4 days, daystart is used to compare from the starting of day i.e, at 00:00 | find . -daystart -ctime 4 -ls -type f |
Print a line of 100 '=' characters | head -c 100 < /dev/zero | tr '\0' '=' |
List the names of all files under current directory | find . -type f -exec basename {} \; |
List all files with name "someFile" and their modification time under the current directory sorted by oldest modified to newest modified | find . -name "someFile" -printf "%p:%T@\n" | sort -t : -k2 |
Find all the Sticky Bit set files in entire file system whose permission are 551 | find / -perm 0551 |
display all regular/normal files in the current folder ending with the word ummy | find -type f -name *ummy |
Finds strings with dot-separated sequence of numbers, and prints part of that sequence before the first dot. | echo "$f" | grep -Eo '[0-9]+[.]+[0-9]+[.]?[0-9]?' | cut -d. -f1 |
display all the jpg images in current folder | find . -type f -iregex '.*\.jpe?g' |
Change the permission to 0644 for all files under current directory | find . -type f -exec chmod 0644 {} + |
Find all the files under /home directory with name tecmint.txt | find /home -name tecmint.txt |
Print amount of space available on the file system containg path to the current working directory human-readable. | df -Ph $PWD | tail -1 | awk '{ print $3}' |
Print summary of files present only in dir1. | diff -rq dir1 dir2 | grep 'Only in dir1/' |
Replace all occurrences of 'previousword' with 'newword' in all regular files with '.cpp' extension under '/myprojects' directory tree and modify them in-place | find /myprojects -type f -name '*.cpp' -print0 | xargs -0 -n 1 sed -i 's/previousword/newword/g' |
Print the contents of "/tmp/nums" as input to "addnums" | cat /tmp/nums | addnums |
Filter contents of 'file' through awk commands written in script.awk, display the result. | awk -f script.awk file |
Find all Makefile's in the current directory tree and look for line 235 in each of them | find . -name Makefile -print0 | xargs -0 grep -nH $ | grep :235: |
Search the current directory recursively for regular files last changed less than 2 days ago | find . type -f -ctime -2 |
Move files from $sourcePath to $destPath that have not been modified in the last 10 days | find $sourcePath -type f -mtime +10 -name "*.log" -exec mv {} $destPath \; |
Count the number of files/directories named file1 under current directory | find -name file1 | wc -l |
Search the current directory tree for *cache, *xml, and *html files | find . -type f \ |
Print list of missing files in a Subversion repository. | svn status | grep '\!' | cut -d\ -f2- |
Make directories "Labs/lab4a/folder1", "Labs/lab4a/myfolder", and "Labs/lab4a/foofolder" | mkdir Labs/lab4a/{folder1,myfolder,foofolder} |
search for "specified string" in all the php files in the current folder | find . -name “*.[php|PHP]” -print | xargs grep -HnT “specified string” |
Find out all hard links in the /home directory to file1 | find /home -xdev -samefile file1 |
Find all files under current directory and print them appending a null character at the end of each file paths | find . -type f -print0 |
Ping every address from 192.168.0.1 to 192.168.0.254 with a timeout of 1 second and filter out no responses | echo $ | xargs -P255 -I% -d" " ping -W 1 -c 1 192.168.0.% | grep -E "[0-1].*?:" |
Counts lines in each *.php file. | wc -l `find . -name "*.php"` |
Find all the files which are modified in last 1 hour | find / -mmin -60 |
Search the current directory tree for regular files modified within the past 24 hours whose names do not end with ".DS_Store" | find . -mtime -1 ! -name '.DS_Store' -type f -exec basename {} \; |
run command 'bash --rcfile myfile' as user root | su -c 'bash --rcfile myfile' |
Calculate the md5 sum of all files in the current directory and formatting the output by removing parenthesis | find -maxdepth 1 -type f -exec md5sum {} \; | sed 's/[^(]*(\([^)]*\)) =/\1/' |
Find all directories under /home/username/public_html/sites/all/modules and set their permission to 750 | find /home/username/public_html/sites/all/modules -type d -exec chmod 750 {} + |
find md5sum of string 'hi' | echo -n hi | md5 |
List all empty files in the current directory tree | find . -type f -empty |
List the commands in /usr/bin, pausing for user input after each page. | ls /usr/bin | more |
change the group of all the files which belong to the user edwarda to pubs | find / -user edwarda -exec chgrp pubs "{}" \; |
find all the normal/regular files in the current directory and search for the word mail and display the file names | find . -type f -exec grep -il mail |
Search everywhere for files changed within the last minute | find / -newerct '1 minute ago' -print |
Find all files/directories under current directory that were modified exactly 30 minutes ago | find . -mmin 30 |
wait for a change in "target-directory" before returning | inotifywait -e attrib target-directory |
Find directories under maximum 1 level down the directory $dir with 100 permission that are owned by the user $username | find $dir -maxdepth 1 -type d -user $username -perm -100 |
create directory destdir | mkdir destdir |
Print lines that only unique ones in 'set1' and 'set2' files | cat <(grep -vxF -f set1 set2) <(grep -vxF -f set2 set1) |
Search directory /Users/david/Desktop/ recursively for regular files | find /Users/david/Desktop/ -type f |
Print the current default full path of the "java" executable | echo "The current default java is $" |
Find all empty regular files in the current directory tree | find . -size 0c -type f |
Print only unique lines of 'file_name' file | cat -n file_name | sort -uk2 | sort -nk1 | cut -f2- |
list broken symbolic links under "somedir" | find "somedir" -type l -print0 | xargs -r0 file | grep "broken symbolic" | sed -e 's/^\|: *broken symbolic.*$/"/g' |
Count number of users logged in | who | awk -F' ' '{print $1}' | sort -u | wc -l |
Find all files/directories under '/abs/path/to/directory' directory non-recursively that match the pattern '.*invalidTemplateName.*' in their names | find /abs/path/to/directory -maxdepth 1 -name '.*invalidTemplateName.*' |
Display top 500 mp4 and flv files under current directory along with their timestamps in the sorted order of time | find . -regex ".*\.\(flv\|mp4\)" -type f -printf '%T+ %p\n' | sort | head -n 500 |
Find all directories under path_to_dir directory | find path_to_dir -type d |
Find all directories named "D" in the current directory tree and print their parents | find ./ -type d -name 'D'|sed 's/D$//' |
Search all files called "abc" that reside in the current directory tree for string "xyz" | find . -name "abc" -exec grep "xyz" {} \; |
Find all files in the /usr directory tree that are owned by group `staff' | find /usr -group staff |
display the names without extensions of all the data files in current folder and do not search in sub folders and which have not been changed in the last 60 mins | find . -maxdepth 1 -name '*.dat' -type f -cmin +60 -exec basename {} \; |
Print amount of space available on the file system containing path to the current working directory in megabytes. | df . -B MB | tail -1 | awk {'print $4'} | cut -d'%' -f1 |
create a symbolic link named "link" in directory named as value of the variable $2 to a file that named as result of the command `cd \`dirname $2\`; pwd`/`basename $2` | ln -s `cd \`dirname $2\`; pwd`/`basename $2` $1/link |
Find SUID files | find / -perm +4000 |
Find all *.cgi files/directories under current directory and change their permission to 755 | find . -iname '*.cgi' | xargs chmod 755 |
Finds all php processes running in system. | pstree | grep php |
Remove filetype suffix from filename | echo $filename | rev | cut -f 2- -d '.' | rev |
Find all *.cgi files/directories under current directory and change their permission to 775 | find . -name '*.cgi' -print0 | xargs -0 chmod 775 |
Find all files inside all directories in maximum 2 levels down the /tmp/test directory and print the number of files in each directory and also print the file/directory paths | find /tmp/test/ -maxdepth 2 -mindepth 1 -type d | while read dir; do printf "%s : " "$dir"; find "$dir" -maxdepth 1 -type f | wc -l; find "$dir" -maxdepth 1 -type f ; done; |
search for all the files in the current directory which belong to the user "xuser1" and change the owner ship of them to "user2" | find . -user xuser1 -exec chown -R user2 {} \; |
Prints long listing of content in a root folder, including hidden files, with human-readable sizes, and stores output to '/root/test.out' file. | sudo ls -hal /root/ | sudo bash -c "cat > /root/test.out" |
Login in 'whatever.com' as user 'whoever' with X11 forwarding to enable GUI programs on remote to be run | ssh -X [email protected] |
find all files ending with "js.compiled" in current folder | find . -type f -name "*.js.compiled" |
Print only name and login columns of the currently logged in users | finger -s | awk '{printf;}' |
Echo each command before running | set -x |
display all the files in the directory modules | find . -name modules |
Remove the first 7 characters of every line in the output of "history" | history | cut -c 8- |
Look for files with the name 'search' under current directory | find . -name "search" |
files all files which expect directories and display count of them | find /usr/share \! -type d wc -l |
Find files in entire file system with at least 644 permissions | find / -perm -u+rw,g+r,o+r |
Find all files/directories under /path/to/dir/* paths and print the timestamp in YmdHMS format along with their paths and object of symlinks | find /path/to/dir/* -printf "%TY%Tm%Td%TH%TM%TS|%p|%l\n" |
Find regular files that are larger than 2GB | find . -type f -size +2G |
Gets the groups these users belong to. | groups a b c d |
Search for files only that end with .php and look for the string $test inside those files | find . -name \*.php -type f -print0 | xargs -0 -n1 grep -Hn '$test' |
Execute "ls -l" every 2 seconds and highlight the differences in runs | watch -d ls -l |
Output lines 16224 to 16482 of 'file', not recommended with large files that contain many lines after the ones needed. | awk 'NR==16224, NR==16482' file |
Find all files in the home directory with open permissions | find ~ -perm 777 |
Mathematically sum all numbers in "file.txt" | cat file.txt | xargs | sed -e 's/\ /+/g' | bc |
search all jpg,png,jpefg files in the current folder and calculate the total size of them | find . \ -ls | awk '{total += $7} END {print total}' |
Search for files/directories which are writable by either their owner or their group | find . -perm /u=w,g=w |
Find only permission field & file name from long listing with find command . | find -type f -iname "*.txt" -exec ls -lrt {} \;|awk -F' ' '{print $1 $9}' |
Recursively counts non-blank, non-comment lines in all *.c files in a current folder. | find . -type f -name '*.c' -exec cat {} \; | sed '/^\s*#/d;/^\s*$/d;/^\s*\/\//d' | wc -l |
Search for files with "demo" in their names and "sitesearch" in their path names | find . -iname '*demo*' | grep -i sitesearch |
Find the sorted and unique parent directory paths appended with : of all the files that are executable by owner under ~/code directory without descending into hidden directories and redirect the output to the file ~/.codepath | find ~/code -name '.*' -prune -o -type f -a -perm /u+x -printf ':%h\n' |sort |uniq |tr -d '\n' > ~/.codepath |
Read the first 10 characters from standard input in an interactive shell into variable "VAR" | read -n10 -e VAR |
Deletes empty folder 'nonsense_dir'. | rmdir nonsense_dir |
Archive "/usr/local/" to "/BackUp/usr/local/" on host "XXX.XXX.XXX.XXX" via ssh and show progress | rsync --progress -avhe ssh /usr/local/ XXX.XXX.XXX.XXX:/BackUp/usr/local/ |
Generate UUIDs for the files from the current directory tree | find -printf "%P\n"| sort | xargs -I '{}' bash -c 'echo $ {}' |
display all normal/regular files in a folder | find teste1 -type f |
Delete empty directories | find . -type d -empty -delete |
search for *.log files starting from / | find / -name "*.log" |
Replace "dummyvalue" with the system IP address in "filename" | sed -i s/'dummyvalue'/$(hostname -I | head -n1 | awk '{print $1;}')/g filename |
displays all the files in the current folder | find . |
find all the png files in the current folder which begin with the word image | find . -name "image*.png" |
find all the regular files in the current folder which have specific word in their name and force delete all these files and save the log to the file log_del.txt | find ./ -type f -name '*.r*' -print0 | xargs -0 rm -rf &> log_del.txt |
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