nl_command
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Remove all regular non-hidden files modified more than 7 days ago and residing in the /tmp directory tree | find /tmp -type f -name '*' -mtime +7 -print0 | xargs -0 rm -f |
display all the soft links in a folder which are not broken | find -L /target ! -type l |
Find all 1.txt, 2.txt and 3.txt files under current directory and change the permission to 444 | find . \ -print|xargs chmod 444 |
change user of the direct public_html to user owner and group nobody | chown owner:nobody public_html |
Findx all files having text "texthere" recursively in a current folder, and prints only file names with matching strings. | find -type f -exec grep -l "texthere" {} + |
Find all *.mpg files under current directory and run an ffmpeg command on each of them | find . -name "*.mpg" -type f -print0 | xargs -0 -I {} -n 1 -P 4 ffmpeg -i {} {}.mp4 |
Add read permission for 'other' for all files/directories named 'rc.conf' under current directory tree | find . -name "rc.conf" -exec chmod o+r '{}' \; |
Set the 'xtrace' shell option | set -o xtrace |
Print the names of all files in the home directory and its subdirectories recursively whose MIME type is video | find ~ -type f -exec file -i {} + | grep video |
download contents of a website "https://get.scoop.sh" | curl -L https://get.scoop.sh |
Find all xx* files/directories excluding 'xxx' files/directories under your home directory | find ~ -name 'xx*' -and -not -name 'xxx' |
recursively change owner and group of the directory and all files into it to user root and group root | chown -R root:root /var/lib/jenkins |
Delete all lines matching "pattern" in "filename" | sed -i '/pattern/d' filename |
find all files in current folder which are bigger than 270MB and less than 300MB | find . -size +270M -size -300M |
print disk usage of files or folders in current directory | du -sh * |
display all the files in the folder a | find a |
display the contents of all the regular files in the current folder and save the output to out.txt | find . -type f -print0 | xargs -0 cat > out.txt |
Make directory "dir" and do not cause an error if it exists | mkdir -p dir |
find all c, cpp files in current folder | find -regex '.*\.\(c\|cpp\)' |
Find all *.tex regular files in maximum 2 levels down the current directory | find . -type f -maxdepth 2 -name "*.tex" |
Open "charm" executable file in vim | sudo vim `which charm` |
Split a file ADDRESSS_FILE into pieces per 20 lines named with prefix "temp_file_ and numeric suffixes | split -l20 ADDRESSS_FILE temp_file_ |
Read a line from standard input into variable "password" without echoing the input | read -s password |
find all the regular/normal files in the /path folder and delete them | find /path -type f -exec rm '{}' \; |
Create a symbolic link in directory "new" for each file in "original" directory tree | find original -type f -exec ln -s {} new/{} \; |
Convert ";" separated list "luke;yoda;leila" to new line separated list | echo "luke;yoda;leila" | tr ";" "\n" |
list all the drectories present in the current directory and do not search in the sub directories. | find -maxdepth 1 -type d |
Get virtual private memory use of process | top -l 1 -s 0 -stats vprvt -pid 8631 |
display a long listing of all regular files in current folder which have been modified in the last 60 minutes | find . -mmin -60 -type f -exec ls -l {} \; |
change the group to "new_group" and permissions to 770 for all the files in the current folder, $0 is the input to the sub shell i.e, the name of the file | find . -name "*" -exec sh -c 'chgrp -v new_group "$0" ; chmod -v 770 "$0"' {} \; |
display all the regular/normal files in the current folder that are not accessed in the last 10 minutes | find . -type f -amin +10 |
Print the first line of "filename" as a hex dump of characters | head -n 1 filename | od -c |
create a symbolic link named "$ORACLE_HOME/include" to file "/usr/include/oracle/11.2/client" | sudo ln -s /usr/include/oracle/11.2/client $ORACLE_HOME/include |
Make directory and parents as needed for each unique mime type in the current directory | mkdir -p `file -b --mime-type *|uniq` |
Print unique lines of sorted file "f1" compared to sorted file "f2" | comm -2 -3 f1 f2 |
Numberically sort content of file 'files', using for sorting part of second one of dash separated fields beginning from second letter. | cat files | sort -t- -k2,2 -n |
Change owner to "root" and group to "www-data" of "/foobar/test_file" | sudo chown root:www-data /foobar/test_file |
Print numbers from 1 to 5 without separating spaces and without a newline | seq 5 | awk '{printf "%s", $0}' |
List all files under the current working directory last modified less than a day ago | find `pwd` -mtime -1 -type f -print |
Find all TXT files in the current directory and copy them to directory "$HOME/newdir" | find "$HOME" -name '*.txt' -type f -print0 | xargs -0 cp -ut "$HOME/newdir" |
display a long listing of all the xls or csv files in the entire file system | find / -type f \ -exec ls -l {} \; |
Print which files differ in "folder1" and "folder2" excluding "node_modules" recursively, output in two columns, and paginate the output | diff -rqyl folder1 folder2 --exclude=node_modules |
display the amount of disk space used by all the log files in the folder /usr/local/apache/logs/ | find /usr/local/apache/logs/ -type f -name "*_log"|xargs du -csh |
Find all files whose names begin with 'Makefile' in the /usr/ports directory tree and count how many of them contain 'QTDIR' | find /usr/ports/ -name Makefile\* -exec grep -l QTDIR '{}' '+' | wc -l |
Remove all vmware-*.log files under current directory | find . -name vmware-*.log -delete |
Find files on the system that are bigger than 20 megabytes | find / -type f -size +20M -exec ls -lh {} \; | awk '{ print $NF ": " $5 }' |
List all files in the current directory tree including those that may contain spaces in their names | find . -print0 | xargs -0 -l -i echo "{}"; |
get year-month-day from date | date +%Y-%m-%d |
Search for all jpg images on the system and archive them | find / -name *.jpg -type f -print | xargs tar -cvzf images.tar.gz |
ssh into localhost on port 10022 | ssh -p 10022 localhost |
search for all the c files in the current folder | find . -name \*.c -print |
Find directories with permissions 777 and change them to 755 recursively | find /home -type d -perm 777 -print -exec chmod 755 {} \; |
Recursively removes all files and folders like 'FILE-TO-FIND' from current folder. | find . -name "FILE-TO-FIND" -exec rm -rf {} \; |
Create all directories in the path specified by variable $tempWork | mkdir -p $tempWork |
Counts the number of lines in each *.cs file in a git repository. | wc -l $ |
Execute "ls -l" every 2 seconds | watch ls -l |
Change the user and group of all files and directories under /var/www to www-data:www-data | find /var/www -print0 | xargs -0 chown www-data:www-data |
Find all the files whose name is FindCommandExamples.txt in the current working directory | find /root -name FindCommandExamples.txt |
Sort all directory names matching folder_* and go to the last one. | cd $(find . -maxdepth 1 -type d -name "folder_*" | sort -t_ -k2 -n -r | head -1) |
Execute the `convert' command for every .jpg file in the current directory | find . -maxdepth 1 -name *.jpg -print -exec convert |
Print the sizes and names of all TXT files from the current directory tree | find . -iname "*.txt" -exec du -b {} + |
For each line which has a common first field in file1.csv and file2.txt, output the first 4 fields of file1.csv - both files must be sorted first. | join -o 1.1,1.2,1.3,1.4 -t, file1.csv file2.txt |
List the unique tab delimited field number "$FIELD" in all files, prefix with the number of occurrences, sort from most frequent to least frequent | cut -f $FIELD * | sort| uniq -c |sort -nr |
Find all *.css files under $DIR and print the lines matching the regex '\.ExampleClass.{/,/}' from those files | find ${DIR} -type f -name "*.css" -exec sed -n '/\.ExampleClass.{/,/}/p' \{\} \+ |
Find all .mp3 files with more then 10MB and delete them from root directory . | find / -type f -name *.mp3 -size +10M -exec rm {} \; |
find all the files in the current folder which have been modified in the 10 minutes ago | find -mmin +15 -mmin -25 |
Save the list of all .py files under and below the current directory to output.txt | find . -name "*.py" -type f > output.txt |
Print a randomly sorted list of numbers from 1 to 10 to file "/tmp/lst" and outputs "-------" followed by the reverse list to the screen | seq 1 10 | sort -R | tee /tmp/lst |cat <(cat /tmp/lst) <(echo '-------') | tac |
find all files in the current directory whose size is 24 or 25 bytes. | find . -size -26c -size +23c -print |
Change the permission to 0755 for all directories under current directory | find . -type d -exec chmod 0755 {} \; |
search for files that are readable for everybody, have at least on write bit set but are not executable for anybody | find . -perm -444 -perm /222 ! -perm /111 |
Print info about all mounted file systems | df |
Run mycommand in /tmp without changing the current shell's working directory | |
Change the permissions of all regular files whose names end with .mp3 in the directory tree /var/ftp/mp3 | find /var/ftp/mp3 -name '*.mp3' -type f -exec chmod 644 {} \; |
change group of the file /tmp/php_session to group daemon | chown -R :daemon /tmp/php_session |
change the permissions of all the files ending with "fits" in the folder "/store/01" and save the output file names to a log file | find /store/01 -name "*.fits" -exec chmod -x+r {} \; -exec ls -l {} \; | tee ALL_FILES.LOG |
Takes folder name of file $0, changes backslashes to forward ones and saves result in $basedir variable. | basedir=$(dirname "$") |
find all class files or sh script files in the current folder | find . -type f \ |
Print command with PID 11383 | ps | egrep 11383 | tr -s ' ' | cut -d ' ' -f 4 |
Remove containing directories and suffix ".wiki" from specified path, output the result. | basename /home/jsmith/base.wiki .wiki |
display all the files in the current folder which have colon in their name | find . -name "*:*" |
Prepend the reverse history number to the output of the history command with arguments "$@" | history "$@" | tac | nl | tac |
find all the php files in current folder and search for multiple patterns in these files | find -name '*.php' -exec grep -li "fincken" {} + | xargs grep -l "TODO" |
Source "lib/B" relative to the directory of the executing shell script, will fail if currently running script is not in PATH. | source "$( dirname "$" )/lib/B" |
display all the empty files in current folder | find . -empty |
display the contents of all the regular files in the current folder and save the output to out.txt | cat `find . -type f` > out.txt |
search for all the files in the current folder which start with gen and end with bt2 and assign the output list to the variable var. | var="$" |
Find all directories named 'local' in entire file system | find / -name local -type d |
display a long list of all the files that are bigger than 10KB in current folder | find . -size +10k -exec ls -l {} \; |
Find all regular files named 'whatever' under current directory tree excluding all paths that contain any hidden directory | find . \ -type f -name "whatever" |
change owner of the files into directory "/mydir" with ".txt" extension to user root | find /mydir -type f -name "*.txt" -print0 | xargs -0 chown root $(mktemp) |
check the type of files in the folder /usr/bin | find /usr/bin | xargs file |
List all IP addresses assigned to current hostname, pausing for user interaction after each page. | more /etc/hosts | grep `hostname` | awk '{print $1}' |
Prints what year it was 222 days ago | date --date="222 days ago" +"%Y" |
Search the entire file system for any file that is writable by other. | find / – perm -0002 |
Archive the directory structure under current directory into /somewhereelse/whatever-dirsonly.tar | find . -type d |xargs tar rf /somewhereelse/whatever-dirsonly.tar --no-recursion |
List and see contents of all abc.def files under the directories /ghi and /jkl | find /ghi /jkl -type f -name abc.def 2> /dev/null -exec ls {} \; -exec cat {} \; |
search for files cart4 or cart5 or cart6 in the folder junk which is in home folder and delete it. | find ~/junk -name 'cart[4-6]' -exec rm {} \; |
display all the files in the current folder which have been modified in the last 24 hours | find . -mtime -1 -print |
find all the ogg files in the current directory which have the word "monfichier" in their name | find -name *monfichier*.ogg |
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