nl_command
stringlengths 14
387
| bash_code
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532
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find any files in the current directory that begin with a number | find . -regex './[0-9].*' -print |
Go to last directory with name starting with a number, useful for timestamped directory names. | cd "$(ls -rd [0-9]*/ | tail --lines 1)" |
find all the files in the current directory which have been modified in the last 24 hours | find . -mtime 0 |
search for the file picasso in the folder /home/calvin/ | find /home/calvin/ -iname “picasso” |
Find broken links | find / -type l -print0 | xargs -0 file | grep broken |
change owner of the file "file" to user user_name | chown user_name file |
display all files in the current folder with the name test excluding those that are present in the sub folders of the test folder | find . -name test -prune |
Print the base name via grep of the current working directory | pwd | grep -o '[^/]*$' |
Make directories to "$2" as needed | mkdir -p $2 |
Removes the last 2 lines from a file | head -n -2 myfile.txt |
Find all files except files with '.gz' extension in the current directory non-recursively and compress them with gzip | find . -maxdepth 1 -type f ! -name '*.gz' -exec gzip "{}" \; |
Find the total size of *.jpg files within the current directory tree | find . -type f -iname '*.jpg' -print0 | xargs -r0 du -a| awk '{sum+=$1} END {print sum}' |
Remount "/" with read and write permission | mount / -o remount,rw |
display all files in current folder with NULL separating each file | find . -print0 |
Count all the lines of all php files in current directory recursively | find -name '*.php' | xargs cat | wc -l |
Search the files of the current directory tree for string "searched-string" | find . | xargs grep "searched-string" |
run script "runProgram.sh" as user jetty | su - jetty sh ./runprogram.sh |
Show manual page for the find utility | man find |
Find all directories under current directory and run /path/to/script.sh for each of them | find . -type d -exec /path/to/script.sh '{}' \; |
Replace all occurrences of edx with gurukul in all *.css files under ./cms/djangoapps/contentstore/views directory | find ./cms/djangoapps/contentstore/views -iname *.css | xargs sed -i s/[Ee][Dd][Xx]/gurukul/g |
Installs locally located 'packagename.arch.rpm' package, ignoring GPG checking. | yum --nogpgcheck localinstall packagename.arch.rpm |
Backup MySQL database "database" with "username" and "pswd", compress with gzip and add the time stamp before emailing to "[email protected]" | mysqldump -e --user=username --password=pswd database | gzip | uuencode my-dbbackup.`date +"\%Y-\%m-\%d"`.gz | mail [email protected] |
Display the named characters in "line1\r\nline2" | echo -e "line1\r\nline2" | awk '{ print $0; }' | od -a |
Find all files name passwd in the root directory and all its sub-directories. | find / -name passwd |
Find all files/directories under current directory that match the case insensitive regex ./\(RT\|ED\).* and show several lines of output from the beginning | find . -iregex './\(RT\|ED\).*' | head |
display files ending with ".ext" in current folder which are present in the file "foo" | find . -type f -name \*.ext | xargs grep foo |
List all variables with names containing X. | env | awk -F "=" '{print $1}' | grep ".*X.*" |
Search for 'foo=' in all *.png files under current directory without descending into *.gif and *.svn directories | find . -name "*.png" -prune -o -name "*.gif" -prune -o -name "*.svn" -prune -o -print0 | xargs -0 -I FILES grep -IR "foo=" FILES |
Compare sorted files 'f1.txt' and 'f2.txt' and print in three columns strings unique for first file, second file, and common ones | comm < < |
Look for all files whose names match pattern 'my*' | find / -name 'my*' |
Finds recursively all folders in current folder which path not contains "NameToExclude" string and removes only ones without files and another folders within. | find . -type 'd' | grep -v "NameToExclude" | xargs rmdir |
Find all directories under 'A' directory tree excluding paths containing the directory 'a' | find A -type d \ |
search for the file, filename.txt in the current folder ( case insensitive search ) | find . -iname filename.txt |
Find all the SUID files in the current directory tree | find . -perm /u=s |
Extract and print hostname and protocol part from URL like "http://www.suepearson.co.uk/product/174/71/3816/". | echo "http://www.suepearson.co.uk/product/174/71/3816/" | cut -d'/' -f1-3 |
Search the current directory tree for regular files that contain "string" | find . -type f -printf '"%p"\n' | xargs grep string |
change the owner of all the regular/normal files which belong to the root user to "tom" in the current folder | find .-type f -user root -exec chown tom {} \; |
Recursively copy all files matching "*.sh" in "$from" to "root@$host:/home/tmp/" compressing data during transmission | rsync -zvr --exclude="*" --include="*.sh" --include="*/" "$from" root@$host:/home/tmp/ |
long list al the files in the current directory which have all the permissions | find . -perm 777 -type f -exec ls -l {} \; |
Copy entire directory structure from dir1 as a subdirectory of dir2, omitting any file or directory named "exclude". | mkdir dir2; tar cvf - dir1/ --exclude "*/exclude" | tar xvf - -C dir2 |
Find all files under and below the current working directory with the word California in the file (case insensitive), and count the number of lines in the output | find . -type f -exec grep -i California {} \; -print | wc -l |
Print current date as epoch seconds | date +%s |
Search for 'pattern' in all files with '.cc' extension under current directory tree and show the matched lines with line numbers and filenames | find . -name “*.cc” |xargs grep -n “pattern” |
Numerically sort file "table" by the fourth character of the second field, ignoring leading spaces | sort -b -n -k2.4 table |
Find all directories named "nasa" | find . -name nasa -type d |
display all files in current folder using regular expression | find -regex "$rx" |
Find all directories under $ROOT_DIR and show the sub-directories of the directories before the directories themselves | find $ROOT_DIR -type d -depth -print |
Create a rsa key with comment specified by variable APP and passphrase specified y SSHKEYPASS. | ssh-keygen -t rsa -C "$APP" -N "$SSHKEYPASS" -f ~/.ssh/id_rsa |
Look up for 'myip.opendns.com' in server 'resolver1.opendns.com' and save the terse output in 'IP' variable | IP=$(dig +short myip.opendns.com @resolver1.opendns.com) |
Recursively copy all files and directories in "demo" excluding ".git" to "demo_bkp" | find demo -depth -name .git -prune -o -print0 | cpio -0pdv --quiet demo_bkp |
Find all files under media/ directory and change their permission to 600 | find media/ -type f -exec chmod 600 {} \; |
Find files under [directory] that match 'pattern_to_INCLUDE' in their names without descending into directories that match 'pattern_to_exclude' and 'another_pattern_to_exclude', then search for 'pattern' in those files | find [directory] -name "pattern_to_exclude" -prune -o -name "another_pattern_to_exclude" -prune -o -name "pattern_to_INCLUDE" -print0 | xargs -0 -I FILENAME grep -IR "pattern" FILENAME |
display long listing of all normal/regular files in the current directory which have been modified in the last 2 days. | find . -mtime -2 -type f -name "t*" -exec ls -l '{}' \; |
Find all files/directories under current directory tree that start with 'test' in their names without descending into directories with the same name pattern | find . -name 'test*' -prune |
Change permissions of "/dvtcolorconvert.rb" to 755 | sudo chmod 755 /dvtcolorconvert.rb |
Find all 400 permission files under /data directory and change their permission to 755 | find /data -type f -perm 400 -print | xargs chmod 755 |
sleep until a specific date | sleep $ |
Count the number of files in the /usr/ports directory tree whose names begin with 'pkg-plist' and which contain 'etc/rc.d/' | find /usr/ports/ -name pkg-plist\* -exec grep -l etc/rc.d/ '{}' '+' | wc -l |
Print command history | history |
Save the first "." separated field of the system host name to variable "HOSTZ" | HOSTZ=$( hostname | cut -d. -f1 ) |
Remove the last two alphanumeric file extensions from "mpc-1.0.1.tar.gz" | echo "mpc-1.0.1.tar.gz" | sed -r 's/\.[[:alnum:]]+\.[[:alnum:]]+$//' |
Create a symbolic link to file "/usr/bin/perl" named with escaped characters "/usr/local/bin/perl\r\n" | sudo ln -s /usr/bin/perl /usr/local/bin/perl`echo -e '\r'` |
Variable PID contains a process ID, send SIGTERM to this process if it exists. | kill $PID |
Find all executables under /path directory | find /path -perm /ugo+x |
Move all *.mp4 files from directory /foo/bar and its subdirectories to /some/path | find /foo/bar -name '*.mp4' -exec mv -t /some/path {} + |
Find all files in current directory and search for 'searchName' in those files | find ./ -name "*" | xargs grep "searchName" |
Find all directories under 'project' directory without going into subdirectories that do not match the POSIX egrep regex $PATTERN in their paths and are not empty | find project -maxdepth 1 -mindepth 1 -regextype posix-egrep ! -iregex $PATTERN ! -empty -type d |
Display a tree-like view of USB devices, letting the user page through it with the arrow keys, with the Q key to quit. | sudo lsusb -t|less |
Search the current directory recursively for files last modified within the past 24 hours ignoring .swp files and paths ./es* and ./en* | find -mtime 0 -not \ |
Find *.c and *.sh files | find . -type f \( -name "*.c" -o -name "*.sh" \) |
Search the files from the current directory tree for "chrome" | find . | xargs grep 'chrome' |
Archive "blanktest/" to "test/" deleting any files in the destination not found in the source | rsync -a --delete blanktest/ test/ |
Delete all regular files under $DIR directory tree that have been modified before file $a | find "$DIR" -type f \! -newer "$a" -exec rm {} + |
List all files in the current directory tree that were modified less than 60 minutes ago | find . -mmin -60 |xargs ls -l |
List all files/directories under current directory matching the posix-egrep type regex ".+\.$" in their names excluding the paths */generated/* and */deploy/* | find . -regextype posix-egrep -regex '.+\.$' -not -path '*/generated/*' -not -path '*/deploy/*' -print0 | xargs -0 ls -L1d |
Print a NULL-separated list of all directories of the current directory tree | find . -type d -print0 |
Change permissions to 644 for all files showing the respective chmod command | find ./ -type f -print0 | xargs -t -0 chmod -v 644 |
Search for 'ireg' in all PHP files under 'project' directory tree and show only the files that match | find project -name '*.php' -type f -print0 | xargs -0 grep -l ireg |
find all the files in the entire file system that have been modified exactly 7 days before which end with "conf" | find / -name "*conf" -mtime 7 |
Find all symlinks under /path/to/dir and replace them with the actual files they are pointing at | find /path/to/dir -type l -exec sh -c 'cp --remove-destination "$" "{}"' \; |
Locates Erlang distribution, and prints release number from 'RELEASES' file. | awk -F, 'NR==1 {gsub;print $3}' "$(dirname $(readlink -f $))/../releases/RELEASES" |
Copy "some_file_name" to "destination_directory" and change ownership to "someuser:somegroup" | echo 'some_file_name' | cpio -p --owner someuser:somegroup destination_directory |
search for a word in all the regular files in the current folder. | find -type f -print0 | xargs -r0 grep -F 'example' |
Adjust the timestamp of file $filename by subtracting 2 hours from it | touch -d "$(date -r "$filename") - 2 hours" "$filename" |
find all files that names are filename and open in nano text editor | find / -name filename -exec nano '{}' \; |
Print command history | history |
remove all the DS_Store files in the current directory | find . -name .DS_Store -exec rm {} \; |
List all of the subdirectories in the current directory with no trailing slash. | ls -d */ | cut -f1 -d'/' |
Find all regular files under /home/www and replace every occurrences of 'subdomainA.example.com' with 'subdomainB.example.com' in those files invoking sed as few times as possible | find /home/www/ -type f -exec sed -i 's/subdomainA\.example\.com/subdomainB.example.com/g' {} + |
List the unique second "/" delimited field of every line from standard input prefixed by the number of occurrences | cut -d/ -f1-2 | cut -d/ -f2- | sort | uniq -c |
Find all files/directories named Root under current directory and copy them to newRoot | find . -name Root | xargs cp newRoot |
Recursively finds in all folders but "./output/*" all files but *.o, *.swp and prints strings with 'soc_attach' text pattern and number of matched string. | find . \ -a \ -a \ -a \ | xargs grep -n soc_attach |
Find all files under the current directory and copy their permissions to the same file in "../version1" | find . -type f | xargs -I {} chmod --reference {} ../version1/{} |
Find all the files that are not named "MyCProgram.c" in the current directory only and without regards to case. | find -maxdepth 1 -not -iname "MyCProgram.c" |
Change every file under "/var/www/html/" to have permissions 664 | sudo find /var/www/html/ -type f -exec chmod 664 {} \; |
Read a single character from standard input into variable "key" without backslash escapes and using the prompt "Press any key to continue..." | read -n1 -r -p "Press any key to continue..." key |
Print a listing of the `other' directory | find other -maxdepth 1 -printf "%P\n" |
Recursively changes group ownership of every folder in a current directory to the name of that folder. | find . -type d | sed -e 's/^\.\///g' | awk '{print $1, $1}' | xargs chgrp |
Finds $a pattern in a $b string, and returns exit code 0 if found, suppressing any visible output. | echo $b|grep -q $a |
Execute "myscript.rb" with the first argument as the current host name and the second "file.txt" | myscript.rb `hostname -i` file.txt |
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