nl_command
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Print file type of the command "c++" | file `which c++` |
Search for files/directories which are writable by both their owner and their group | find . -perm -g+w,u+w |
Find all files with the SUID bit set | find / -perm -u+s |
Create symlinks to all /home/folder1/*.txt files with the same name in current directory | find /home/folder1/*.txt -type f -exec ln -s {} \; |
Search the system for 'dead' symbolic links | find / -type l -print | perl -nle '-e || print'; |
Report total file systems disk usage. | df --total | tail -n 1 |
Count the number of lines in all ".txt" files | cat *.txt | wc -l |
Archive the list of 1st level subdirectories in /fss/fin to /fss/fi/outfile.tar.gz | tar -czf /fss/fi/outfile.tar.gz `find /fss/fin -d 1 -type d -name "*" -print` |
Find files starting with the word "file" in the current directory tree | find . -name "file*" |
Find all 100MB+ files and delete them | find / -size +100M -exec rm -rf {} \; |
Gets MAC address of en0 network interface. | ifconfig en0 | grep -o -E '{5}[[:xdigit:]]{1,2}' |
ssh into "hostname" as user "buck" | ssh buck@hostname |
Search the current directory tree for files whose names contain "TextForRename" | find ./ -name "*TextForRename*" |
Display a long listing of all the regular files in the file system which belong to user 'root' and which have suid bit set | find / -type f -user root -perm -4000 -exec ls -l {} \; |
Print the file system "file/goes/here" is on | df -P file/goes/here | tail -1 | cut -d' ' -f 1 |
Create a symbolic link named "$HOME/bin/" to "$HOME/downloads/fnord" | ln -s $HOME/downloads/fnord $HOME/bin/ |
find all the regular/normal files in the current folder which belong to the group "flossblog" | find . -group flossblog -type f |
Find all files under current directory and change their permission to 644 | find . -type f -exec chmod 644 {} \; |
find all .bak files in or below the current directory and move them to ~/.old.files directory: | find . -name "*.sh" -print0 | xargs -0 -I {} mv {} ~/back.scripts |
Find all '*~' files under current directory and delete them | find ./ -name '*~' | xargs> rm |
run command "/usr/bin/psql database -c \"SELECT 'DROP TABLE ' || .... " as user postgres | su - postgres -c "/usr/bin/psql database -c \"SELECT 'DROP TABLE ' || .... " |
Create intermediate directories "x" and "p" as required and create "q" | mkdir -p x/p/q |
Change permissions of ".git/hooks/pre-commit" to 777 | sudo chmod 755 .git/hooks/pre-commit |
Search *.x files from the current directory tree for string "fred" | find . -name ‘*.x’ -print0 | xargs -0 grep fred |
Save a nginx link to "/path/to/file" with the current user and system FQDN host name in variable "path" | path="http://$(whoami).$(hostname -f)/path/to/file" |
Change permissions of ".bash_logout", ".bashrc", and ".profile" to 444 | chmod 444 .bash_logout .bashrc .profile |
Print the contents of "filename" | cat filename |
Uncomment every entry in current user's cron job list which contains "test.sh" | crontab -l | sed '/# *\([^ ][^ ]* *\)\{5\}[^ ]*test\.sh/s/^# *//' | crontab - |
Finds all logged in users. | w | awk '{print $1}' |
Print a list of most often changed files in git | git whatchanged --all | \grep "\.\.\." | cut -d' ' -f5- | cut -f2- | sort | uniq -c | sort |
List the current directory recursively ignoring the "dir1" subdirectory | find . -path ./dir1\* -prune -o -print |
Search for case-insensitive "string" in "log.tar.gz" | zcat log.tar.gz | grep -a -i "string" |
find all files in the current folder which have not been accessed in the last 30 days in the current folder | find . -atime +30 -print |
delete all the log files in the current folder | find -name '*.log' -delete |
search for all text files in the folder /home | find /home -name *.txt |
Change owner to "$user" and group to "$group" of "$file" | chown -- "$user:$group" "$file" |
Remove all .sh files in the current directory tree whose names begin with "t" | find . -name "t*.sh" -exec rm -vf '{}' \; |
Find files on the system bigger than 50MB but smaller than 100MB | find / -type f -size +50M -size -100M |
Write output of "ls -lR /" to standard output and append to "output.file" | ls -lR / | tee -a output.file |
Recursively finds and compresses all files in the directory '/path/to/dir' | find /path/to/dir -type f -exec bzip2 {} \; |
Find files/directories in entire file system with at least 644 permission | find / -perm -644 |
List the current directory recursively ignoring the "dir1" subdirectory | find . -path ./dir1\* -o -print |
Move "file.txt" to docker container "$COUNTAINER_ID" in path "/var/lib/docker/aufs/mnt/$CONTAINER_ID/rootfs/root/file.txt" | mv -f file.txt /var/lib/docker/aufs/mnt/$CONTAINER_ID/rootfs/root/file.txt |
Find all directories under $x directory and set read-write-execute permission for owner and group and no permission for other for those directories | find ${x} -type d -exec chmod ug=rwx,o= '{}' \; |
Perform a case insensitive search for *.jpg files which are greater than 500KB in size under /ftp/dir/ directory | find /ftp/dir/ -size +500k -iname "*.jpg" |
Run 'chmod 0755' on all directories in the current directory tree | find . -type d -exec chmod 0755 {} \; |
split file data.csv into pieces per 100 lines | split -l 100 date.csv |
Find all directories matching the regex '.texturedata' in their names under '/path/to/look/in/' directory tree | find /path/to/look/in/ -type d | grep .texturedata |
Find directories in the current directory and print them appended with a string literal 'Directory: ' | find . -maxdepth 1 -type d -print | xargs -I "^" echo Directory: "^" |
find all the files in the current directory which have been modified in the last 30 days and display the contents. | find . -atime +30 -exec ls \; |
find all the files ending with emlx in a folder and save the output to a list file | find /path/to/folders/ -name \*.emlx -print0 > filelist |
Look for "testfile.txt" in the "/" directory and 1 level below | find / -maxdepth 2 -name testfile.txt |
Removes 'folderName', and removes all content within if 'folderName' is folder. | rm -rf folderName |
Print as many dots as there are files named "file.ext" in the /home/kibab directory tree | find /home/kibab -name file.ext -exec echo . ';' |
Print the unique lines from standard input preserving the order they appear | nl -n ln | sort -u -k 2| sort -k 1n | cut -f 2- |
Find all *.csv files under /foot/bar/ and move them to some_dir | find /foot/bar/ -name '*.csv' -print0 | xargs -0 mv -t some_dir |
Send every 130 characters of "file" as input to "..." | fold -w130 file | ... |
Locate the httpd.conf file on the system | find / -name httpd.conf |
Takes path list from '.exportfiles.text' file, cuts off first two path segments and last one. | cut -d / -f 4- .exportfiles.text | xargs -n 1 dirname |
Change permissions for all PHP files under the current directory tree to 755 and print the number of files changed | find . -name "*.php" -exec chmod 755 {} + -printf '.' | wc -c |
find all the php files in current folder using regular expressions | find . -regex '.+\.php' |
Find and remove all .txt regular files under the current directory and below | find . -type f -name "*.txt" -exec rm -f {} \; |
Find all *.ogg (case insensitive) files under your home directory that are less than 100MB in size | find $HOME -iname '*.ogg' -type f -size -100M |
Search the /Path/bar* directories recursively for files matching pattern "file_name*" | find /Path/bar* -name "file_name*" |
Find all *.ogg (case insensitive) files/directories under your home directory | find $HOME -iname '*.ogg' |
Send email with subject "Backup" and attachment "mysqldbbackup.sql" and message in "message.txt" to "[email protected]" | cat message.txt | mail -s "Backup" -a mysqldbbackup.sql [email protected] |
search for all the mp3 files in the current folder and change the character encoding of them to <source-encoding> | $ find . -name "*mp3" -print0 | xargs -0 mid3iconv -e <source-encoding> -d |
Find all files that aren't owned by user www-data | find -not -user www-data |
Search for the Perl regex "[\x80-\xFF]" in *.xml files under current directory tree | find . -name *.xml | xargs grep -P "[\x80-\xFF]" |
print the last word in a.txt | tac a.txt | awk 'NF{print $NF; exit}' |
Search the current directory recursively for files whose size is between 10 and 50 MB | find . -size +10M -size -50M -print |
List all aliencoders.[0-9]+ files/directories under /home/jassi/ directory | find /home/jassi/ -name "aliencoders.[0-9]+" 2>&1 | xargs ls -lrt | awk '{print $9}' |
display all the text files in a folder | find $1 -type f -name '*'$n'.txt' |
Find all directories in the /data1/realtime directory tree that were modified within the last 60 minutes | find /data1/realtime -mmin -60 -type d |
Find all *.mp3 files under current directory | find . -name *.mp3 |
Print all files with a '-' after their name if they are regular files, and a '+' otherwise | find / -type f -exec echo {} - ';' -o -exec echo {} + ';' |
Unzip and merge all "small-*.gz" files into files of 2000000 lines | zcat small-*.gz | split -d -l2000000 -a 3 - large_ |
display a long list and delete all the regular/normal files in the current folder starting with the word k which have been modified in the last 4 hours | find . -type f -name “k*.*” -mmin -360 -exec ls -l ‘{}’ ; | xargs -0 /bin/rm -f |
Print the files to which symbolic links in the current directory point | find . -type l -print | xargs ls -ld | awk '{print $10}' |
find all the core files in the entire file system and delete them | find / -name core -exec rm -f {} \; |
Report file system containing the current directory disk usage | df . |
Find all files in the current directory tree whose names are ".DS_STORE" | find . -name ".DS_STORE" |
Find regular files with permissions less than 111 | find -perm -111 -type f |
Find all files/directories under current directory tree wihout descending into './src/emacs' directory | find . -path './src/emacs' -prune -o -print |
sleep for 10 seconds | sleep 10 |
Find files/directories writable by group and others under the /path directory | find /path -perm -go+w |
Find all the files in the current directory | find * -type f -print -o -type d -prune |
Search the /usr/local/doc directory tree for .texi files | find /usr/local/doc -name '*.texi' |
find the type of all the regular/normal files in the current folder | find . -type f -exec file {} \; |
Search the /path directory tree for files having permissions 777 | find /path -perm ugo+rwx |
Print all business days in the current month without column titles | cal -h | cut -c 4-17 | tail -n +3 |
Find recursively all files in the "." directory tree whose names end with ".class" and delete them | find . -type f -name "*.class" -exec rm -vf {} \; |
Locate logo.gif in the /var/www directory tree | find /var/www -name logo.gif |
Print 3 space separated '%' | echo $(yes % | head -n3) |
Automatically log into "SOME_SITE.COM" on port 2400 as user "YOUR_USERNAME" using password "YOUR_PASSWORD" | sshpass -p "YOUR_PASSWORD" ssh -o StrictHostKeyChecking=no YOUR_USERNAME@SOME_SITE.COM:2400 |
List screen IDs | screen -ls |
Find all the files whose permissions are 777 in the current directory | find . -type f -perm 0777 -print |
Find all directories with space in their names under current directory and rename them by replacing all spaces with _ | find -name "* *" -type d | rename 's/ /_/g' |
Get the disk space used by all *.txt (case insensitive) files/directories under current directory | find . -iname "*.txt" -exec du -b {} + | awk '{total += $1} END {print total}' |
Find files modified more recently than file poop | find . -newer poop |
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