nl_command
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Search for the extened regex 'expr' in all files with '.c' and '.h' extension under current directory tree | find . -name '*.[ch]' | xargs grep -E 'expr' |
search for the directory "config" in the current folder | find . -name config -type d |
find all pdf files in the current folder | find . -name “*.pdf” -print |
Find all files named "test2" in the current directory tree | find -name test2 |
find for the word "dba_2pc_pending" in all the files of current fodler having the word "sql" in their name | find . -print|grep sql|xargs grep -i dba_2pc_pending |
find the file "dateiname" in the current folder | find -iname "Dateiname" |
Display the last slash-separated part of each filename path in file.txt | rev file.txt | cut -d/ -f1 | rev |
Remove all files in and below the current directory whose names begin with "not" | find . -name not\* -print0 | xargs -0 rm |
Recursively removes all files named '.svn' in a current folder, and prints messages on each action. | find . -name .svn -exec rm -v {} \; |
Find all *text files/directories under current directory | find -name "*text" |
Search all .c and .h files in the current directory tree for string "e" | find . -name "*.[ch]" -exec grep --color -aHn "e" {} \; |
Display last 100 lines of file-with-line-too-long.txt, waiting for user input after each page. | tail -1000 file-with-line-too-long.txt | more |
Find recursively all regular files in the current directory tree ending in .dll or .exe | find . -type f | grep -P "\.dll$|\.exe$" |
Copy "source" recursively to "destination" excluding "path1/to/exclude" and "path2/to/exclude" | rsync -av --exclude='path1/to/exclude' --exclude='path2/to/exclude' source destination |
Find all the files in the current directory with “linkin park” in their names | find . -maxdepth 1 -iname "*linkin park*" |
Find all *.txt files under /foo and delete them | find /foo -name "*.txt" -delete |
delete all the mp3 files in the current folder. | find . -type f -name "*.mp3" -exec rm -f {} \; |
display all the text files in the home folder | find /home -name "*.txt" |
Get domain name from dig reverse lookup. | $dig -x 8.8.8.8 | grep PTR | grep -o google.* |
Find all files in the current directory recursively with "linkin park" in their names and copy them to /Users/tommye/Desktop/LP | find . -type f -iname "*linkin park*" -exec cp -r {} /Users/tommye/Desktop/LP \; |
find ".flac" files in current folder using regular expressions | find ./ -regex "./cmn-.\.flac" |
Print the files in the current directory as a list of comma separated values | ls | sed '$!s/$/,/' | tr -d '\n' |
Search for all files in the /home directory tree that have the same inode number | find /home -xdev -inum 2655341 |
Log into "[email protected]" using identity file "~/path/mykeypair.pem" | ssh -i ~/path/mykeypair.pem [email protected] |
search for directories in the folder "test" which end have 5 digits as their name | find ./test -type d -name '[0-9][0-9][0-9][0-9][0-9]' |
Search directory tree `MyApp.app' for directories whose name is 'Headers' and delete them | find MyApp.app -name Headers -type d -exec rm -rf "{}" \; |
Sort all directory names matching folder_* and go to the last one. | cd $ |
display the count of all the directories in the current folder | find . -type d –print | wc -l |
find all the text files in the folder /home/calvin which are atleast below 2 levels | find /home/calvin/ -mindepth 2 -name “*.txt” |
Find and uncompress all files in the current directory tree ending in ".csv.gz" | find . -name '*.csv.gz' -exec gzip -d {} \; |
find all the php files in the current folder | find . -name \*.php -type f |
Gets back to the foreground a job with number 2. | fg 2 |
Find all files/directories named orm.properties under current directory | find . -name "orm.properties" |
Read a line from standard input into variable "i" with the prompt " Again? Y/n " | read -p " Again? Y/n " i |
Find all files/directories named 'filename' that belong to user 'username' and group 'groupname' in the entire filesystem | find / -user username -group groupname -name filename |
List all symlinks under current directory and search for targetfile.txt in this list | find . -type l | xargs -I % ls -l % | grep targetfile.txt |
Archive "/path/to/copy" to "/path/to/local/storage" on host "host.remoted.from" as user "user" updating files with different checksums, showing human readable progress and statistics, and compressing data during transmission | rsync -chavzP --stats /path/to/copy [email protected]:/path/to/local/storage |
Find all files/directories named 'photoA.jpg' under current directory tree | find . -name photoA.jpg |
display all text files in current folder | find . -name "*.txt" |
Find files/directories named 'sar' under directory trees whose path starts with '/u' or '/b' or '/s' or '/o' | find `ls -d /[ubso]*` -name sar |
Find files that are 0 bytes in size in the current directory tree and remove them | find . -size 0 -exec rm {} \; |
Convert all DOS files under and below the current directory to the Unix format | find . -type f -exec dos2unix {} {} \; |
Find files in entire file system that are writable by group or other | find / -perm /g+w,o+w |
Calculate the md5 sum of the contents of "$FILES" | cat $FILES | md5sum |
Read a line from standard input with prompt "Continue (y/n)?" and save response in variable "CONT" | read -p "Continue (y/n)?" CONT |
Removes 'folderName', and removes all content within if 'folderName' is folder. | rm -rf folderName |
Recursively unzip files to stdout in "/some/dir/here" and search for "blah" | zcat -r /some/dir/here | grep "blah" |
Find files/directories in entire file system that had their meta information changed more than 3 days ago | find / -ctime +3 |
Executes 'cd /' in a subshell created by a pipeline of built-in function 'true'. | true | cd / |
Find all files/directories that are owned by user 'takuya' under current directory tree | find -user takuya |
List all files except for those in directory SCCS | find . -print -o -name SCCS -prune |
Saves 'ls' output to 'ls_results' file and time report to 'time_results' file. | > ls_results 2> time_results |
Find all files/directories in level 2 down the current directory | find -mindepth 2 -maxdepth 2 |
Display differences between directories dir1 and dir2. | diff -r dir1/ dir2/ |
Search the regular files of the current directory tree for string "stuff" | find . -type f -exec grep -n "stuff" {} \; -print |
Dump all MySQL databases over an ssh tunnel to "[email protected]" and use it as input to mysql | mysqldump --all-databases | ssh [email protected] mysql |
find all the files in the current directory whose size is equal to exactly 126MB. | find . -size 126M |
display all text files in the folder /home/you which have been modified in the last 60*24 hours(case insensitive search) | find /home/you -iname "*.txt" -mtime -60 -print |
Make 999 folders one inside another where first 998 of them is named as "folderX" where X goes from 1 to 998 and the last folder named as "folder9991000" | mkdir -p folder$( seq -s "/folder" 999 )1000 |
long list al the files in the current directory which have only read permission to the group | find . -perm 040 -type f -exec ls -l {} \; |
Print the directory name of the real full path of "relative/path/to/file" where each symbolic link component must exist | dirname `readlink -e relative/path/to/file` |
display all the configuration files in the current folder which are in the current tree structure | find . -path '*/*config' |
display all soft links in current folder | find . -type l |
Execute the SSH command and kill it after 5 seconds | timeout 5 ssh user@ip |
Print the second line of output of "ls -l" | ls -l | head -2 | tail -1 |
list all the directories in the folder httpdocs | find httpdocs -type d |
Count number of A records of domain '$domain' on nameserver '$server' and save value in 'result' variable | result="$" |
List all *.txt files in <path> with details about their attributes | find <path> -xdev -type f -name *.txt -exec ls -l {} \; |
Print the last space separated word from "a b c d e" | echo "a b c d e" | tr ' ' '\n' | tail -1 |
find all the php/javascript files in current folder using regular expressions | find . -regex '.+\.\(php|js\)' |
Search /public/html/cosi for files whose name is "wiki.phtml" | find /public/html/cosi -name "wiki.phtml" |
search for jpg images in folders in the path "cam2/2013" and convert these files to the video Cam2-2013-30fps-19crf.mp4 | find Cam2/2013* -name "*.jpg" -print0 | xargs -0 cat | ffmpeg -f image2pipe -framerate 30 -vcodec mjpeg -i - -vcodec libx264 -profile:v baseline -level 3.0 -movflags +faststart -crf 19 -pix_fmt yuv420p -r 30 "Cam2-2013-30fps-19crf.mp4" |
find all files under the /etc/sysconfig directory that were accessed in the last 30 minutes | find /etc/sysconfig -amin -30 |
Finds shell options like 'checkjobs' with their state. | shopt -p | grep checkjobs |
Display permissions, user, group, and full path for each file in the current directory tree as a list | tree -p -u -g -f -i |
Display the current directory tree except files or directories starting with "3rd" | tree -I '3rd*' |
Delete all files named "filename" in the current directory tree, except the one with path ./path/to/filename | find . -name "filename" -and -not -path "./path/to/filename" -delete |
Split standard input into files with at most 75 lines each | split --lines=75 |
find all the files which have been modified in the last 15 minutes excluding hidden files. | find . -mmin -15 \ |
Search for 'foo=' in all *.png files under current directory without descending into *.gif and *.svn directories | find . -name "*.png" -prune -o -name "*.gif" -prune -o -name "*.svn" -prune -o -print0 | xargs -0 -I FILES grep -IR "foo=" FILES |
Get a list of all hidden files from the current directory tree | find . -type f -name '.*' |
delete all text files in the entire file system | find / -type f -name "*.txt" -print | xargs rm |
Find all symbolic links under '/some/directory' tree | find /some/directory -type l -print |
Copy the executable "python2.7" in $PATH to "myenv/bin/python" | cp `which python2.7` myenv/bin/python |
Change permissions to 644 for all subdirectories | find . -type d -print0|xargs -0 chmod 644 |
Subtract all columns in "File2" from "File1" except the first | awk 'FNR==NR { for(i=2;i<=NF;i++) a[$1][i]=$i; next } { for(j=2;j<=NF;j++) $j-=a[$1][j] }1' File2 File1 | rev | column -t | rev |
Execute "elinks -dump file.html" every 2 seconds | watch elinks -dump file.html |
Report file system containing path to /some/dir disk usage in kilobytes. | df -k /some/dir |
Finds the folder where temporary files would be written to. | dirname $(mktemp -u -t tmp.XXXXXXXXXX) |
create a compressed archive of a target directory excluding '<dir1>' and '<dir2>' | tar cfvz --exclude='<dir1>' --exclude='<dir2>' target.tgz target_dir |
Recursively search for all regular files below directory "dir1" in currentd directory, and output the name of each, without any containing directories. | find ./dir1 -type f -exec basename {} \; |
convert all the regular/normal files in the current folder from dos to unix format | find . -name "*" -type f -exec dos2unix {} \; |
Save the canonical path of "$dir/$file" in variable "path" | path=`readlink --canonicalize "$dir/$file"` |
List all files 2 levels deep in the current directory tree | tree -L 2 -fi |
Find all directories whose name is root in / directory | find / -type d -name root |
display list of all the files in the current folder which are empty. | find . -size 0 -ls |
Find List directory with sub-folder count . | find -maxdepth 1 -type d | sort | while read -r dir; do n=$; let n--; printf "%4d : %s\n" $n "$dir"; done |
Display cumulative CPU usage over 5 seconds. | top -b -d 5 -n 2 | awk '$1 == "PID" {block_num++; next} block_num == 2 {sum += $9;} END {print sum}' |
change the permissions of all the directories to 755 in the folder "/home/nobody/public_html" | find /home/nobody/public_html -type d -exec chmod 755 {} \; |
Calculate md5 checksum of '/etc/localtime' and save the first space separated part in variable 'checksum' | checksum=`md5sum /etc/localtime | cut -d' ' -f1` |
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