nl_command
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Set the modification timestamp of file 'filename' to specified date/time. | touch -m --date="Wed Jun 12 14:00:00 IDT 2013" filename |
create directory foo | mkdir -p foo |
List any line in "f1" or "f2" which does not appear in the other and delete all tab characters in the output | comm -3 <(sort -un f1) <(sort -un f2) | tr -d '\t' |
split file /usr/bin/gcc into pieces per 100000 lines | split -n 100000 /usr/bin/gcc |
Set the variable "me" to the name of the running script. | me=`basename "$0"` |
Sort "$file" and output the result to "$file" | sort -o $file $file |
Use multiple -exec command in find . Find all .txt files & grep banna in .txt files . | find . -name "*.txt" -exec echo {} \; -exec grep banana {} \; |
Counts the number of lines in *.php and *.inc files in a current folder and subfolders. | find . -name '*.php' -o -name '*.inc' | xargs wc -l |
Recursively finds latest modified file in a directory | find . -type f -print0 | xargs -0 stat -f "%m %N" | sort -rn | head -1 | cut -f2- -d" " |
List all environment variables (name and value) whose name either equals HOME or PATH, or starts with GO | env | grep '^\(GO\|HOME=\|PATH=\)' |
Remove all directories called "test" from the current directory tree | find -path "*/test/*" -delete |
Rename absolute path of symbolic link "dirln" to "dir2" | mv "$" dir2 |
Search directory tree `MyApp.app' for directories whose name is 'Headers' and delete them | find MyApp.app -name Headers -type d -delete |
Ping all hosts in file "ips" twice | cat ips | xargs -i% ping -c 2 % |
Count the number of lines in all ".txt" files | cat *.txt | wc -l |
Search the `images' directory tree for regular files | find images/ -type f |
find all the directories in current folder and delete them | find . -type d -delete |
Print each logged in user's username and full name | finger -l | grep "Name:" | tr -s ' ' | cut -d " " -f 2,4- | sort | uniq |
Print the list of files and directories of the /etc directory | find /etc/. ! -name . -prune |
find all readable files | find / -readable |
Print the current date followed by ' doing stuff' | echo $(date) doing stuff |
Print all filenames in /usr/src except for those that are of the form '*,v' or '.*,v' | find /usr/src -not \ '{}' \; -print |
Search the /path directory tree for files that do not have a valid user or group | find /path -nouser -or -nogroup |
Removes trailing and starting newlines from file | tac file | sed -e '/./,$!d' | tac | sed -e '/./,$!d' |
Recursively change the owner of all "*.txt" files under "/mydir" to "root" | find /mydir -type f -name "*.txt" -execdir chown root {} ';' |
Unzip every ".gz" file in the current directory | gunzip *.gz |
Recursively copy all (non-hidden) files and directories in current dir except "foo" to location specified by variable "other" | rsync --recursive --exclude 'foo' * "$other" |
Read a line from standard input into variable "SSHPASS" with prompt "Password: " and without echoing the input | read -p "Password: " -s SSHPASS |
Find all files/directories with '.js' extension under current directory tree excluding paths that contain the directory './directory' | find -name "*.js" -not -path "./directory/*" |
Replace ",," with ", ," twice in "data.csv" and display the "," delimited result as a table | sed 's/,,/, ,/g;s/,,/, ,/g' data.csv | column -s, -t |
find all the html, javascript and text files in the current folder | find . -type f -name "*.htm*" -o -name "*.js*" -o -name "*.txt" |
SSH into "localhost" with forced pseudo-terminal allocation, execute "$heredoc", and save the output to variable "REL_DIR" | REL_DIR="$(ssh -t localhost "$heredoc")" |
Find *.conf files/directories only upto 1 level down under /etc directory and show a few lines of output from the end | find /etc -maxdepth 1 -name "*.conf" | tail |
Make directories and parents as needed to "${raw_folder}" and "${split_folder}" | mkdir -p ${raw_folder} ${split_folder} |
remove all the "core" files in the current folder which have not been changed in the last 4 days. | find . -name core -ctime +4 -exec /bin/rm -f {} \; |
Check that the master ssh connection "officefirewall" is running | ssh -O check officefirewall |
Find all files/directories under current directory | find | xargs |
Search the current directory recursively for regular files modified 2 days ago | find . type -f -mtime 2 |
Find all regular files under and below /home/admin/public_html/, and change their permissions to 644 | find . /home/admin/public_html/ -type f -exec chmod 644 {} \; |
Replace all spaces with underscores in directory paths under current directory. | find -name "* *" -type d | rename 's/ /_/g' |
Find all regular files under test directory | find test -type f |
Request IP address of 'myip.opendns.com' from name server 'resolver1.opendns.com' | dig +short myip.opendns.com @resolver1.opendns.com |
Copy the owner and group of "oldfile" to "newfile" | chown --reference=oldfile newfile |
Prints current directory name | pwd | awk -F/ '{print $NF}' |
Find all *.plist files/directories under current directory | find . -name \*.plist |
List the regular files of the current directory tree that contain string "texthere" | find -type f -exec grep -l "texthere" {} + |
Find all directories under current directory and set read & execute permission for group and other for these files | find . -type d -print0 | xargs -0 chmod go+rx |
For every cron job with a comment "change-enabled" at the end of its crontab entry, change the scheduled hour to 7. | crontab -l | sed -re '/# *change-enabled *$/s/^ [^ ]+/\1 7/' | crontab - |
count lines of C or C++ or Obj-C or Java code under the current directory | find . \ -print0 | xargs -0 wc |
display the manual page of find | man find |
Find the "erl" executable in $PATH and read the "RELEASES" file to extract the erlang release number | awk -F, 'NR==1 {gsub(/"/,"",$3);print $3}' "$(dirname $(readlink -f $(which erl)))/../releases/RELEASES" |
Recursively add read and execute permissions to all files and folders in "directory" | chmod -R +xr directory |
Print the list of all directories under the current directory and below | find ./ -type d -print |
renames all ".htm" files to ".html" files | find . -name "*.htm" -exec mv '{}' '{}l' \; |
find all the directories with the name "uploads" in current folder | find . -type d -name 'uploads' |
display list of all the hidden files in the directory "/dir/to/search/" | find /dir/to/search/ -name ".*" -ls |
search for all the regular files in the folder /home which have the permission 077 | find /home -type f -perm 0777 -print |
Update timestamps of all files in entire filesystem which are not newer than /tmp/timestamp | find / ! -newer /tmp/timestamp -exec touch {} \; |
delete all the tmp files in the /tmp folder | find /tmp -name "*.tmp" | xargs rm |
Display the contents of "myfile" located in the current directory. | cat myfile |
find all the text files in the home directory | find ~/ -name '*.txt' |
Find all files in current directory that were modified less than 1 day ago excluding hidden files and archive them and put the output into the variable file_changed | file_changed=$(find . -depth \( -wholename \./\.\* \) -prune -o -mtime -1 -print | cpio -oav) |
Save the short system host name to variable "hostname" | hostname=`hostname -s` |
Find all files named "filename" | find -name "filename" |
create a zip file of all the files in some directory | find $directory -type -f -execdir zip -j $ZipFileName {}\; |
Recursively finds all "*.pas" and "*.dfm" files and prints strings with "searchtext" ignoring text distinctions, suppressing error messages, highlighting found patterns and preceding each found string with file name and string number. | find . -type f \( -name "*.pas" -o -name "*.dfm" \) -print0 | xargs --null grep --with-filename --line-number --no-messages --color --ignore-case "searchtext" |
Find SGID files | find / -perm +2000 |
Find all *.py files/directories under current directory | find . -name \*.py -print |
Find all regular files in and below the home directory that have been modified in the last 90 minutes | find ~ -type f -mmin -90 |
Find all *.jpg files under current directory | find . -name *.jpg |
Search the current directory tree for regular files omitting directory `omit-directory' | find . -name omit-directory -prune -o -type f |
Recursively delete all files/folders named '.svn' in a current folder. | find . -name .svn -delete |
Remove all .txt files in and below the current directory | find . -name "*.txt" -exec rm {} \; |
display all the regular/normal files in the current directory | find . -type f |
find all files in the file system with the permissions 777 and having the word "filename" in their name. | find / -perm 777 -iname "filename" |
Search for files greater than 20MB in the entire file system and display the path and file size | find / -type f -size +20M -exec ls -lh {} \; | awk '{ print $NF ": " $5 }' |
Report file systems inode usage. | df -i |
Search the system for regular files whose names are "filename" ignoring the case | find / -type f -iname "filename" |
Search all files & directoy from root directory which are greater then 100M and delete them . | find / -size +100M -exec rm -rf {} \; |
Find all dir* files/directories under parent | find parent -name dir* |
Search the current directory tree for the files with extension "trc" and remove them if they are more than three days old | find . -name "*.trc" -ctime +3 -exec rm {} \; |
Save the first "." separated field of the system host name to variable "HOSTZ" | HOSTZ=$ |
Print output of 'script -q /dev/null ./a' to standard output and "output.txt" | script -q /dev/null ./a | tee output.txt |
Output the specified path removing all containing directories and the .txt suffix, in this case "filename". | basename /path/to/dir/filename.txt .txt |
Fiind and remove multiple files such as *.mp3 or *.txt | find . -type f -name "*.txt" -exec rm -f {} \; |
display a long list of all the jpg files in the home folder | find ~ -iname '*.jpg' -exec ls {} \; |
Display the last slash-separated part of path, in this case "example". | basename /usr/local/svn/repos/example |
Get the disk space used by all *.txt (case insensitive) files/directories under current directory | find . -name "*.txt" -print0 |xargs -0 du -ch | tail -n1 |
Change directory to the output of command '~/marker.sh go "$@"' | cd $ |
Print multiline text "ONBOOT=\"YES\"\nIPADDR=10.42.84.168\nPREFIX=24" to the terminal, replacing '\n' with newline symbol, and append that text to file /etc/sysconfig/network-scripts/ifcfg-eth4 as root user. | echo -e "ONBOOT=\"YES\"\nIPADDR=10.42.84.168\nPREFIX=24" | sudo tee -a /etc/sysconfig/network-scripts/ifcfg-eth4 |
count all the regular files that are present in a directory | find . -type f | wc -l |
Print a 2 byte hexadecimal value, printable character, and octal value of "$1" | echo "$1" | od -xcb |
Print information of the root mount point | mount -v | grep " on / " |
Make directory "/var/svn" | sudo mkdir /var/svn |
Move all hidden files in "/path/subfolder/" to "/path/" | mv /path/subfolder/.* /path/ |
Split "infile" into 2 files of about equal size | split -n2 infile |
Find all directories named '.texturedata' under '/path/to/look/in/' directory tree | find /path/to/look/in/ -type d -name '.texturedata' |
Find all files under /path and below writable by `group' and `other' | find /path -perm -022 |
Find files and directories modified in last 24 hours | find . -mtime 1 |
Recursively copy all files and directories matching "*ela*L1*TE*" in localhost's directory /tdggendska10/vig-preview-dmz-prod/docs/sbo/pdf/ to /var/www/html/sbo/2010/teacher/ela/level1 on localhost connecting as ssh user "dalvarado", in batch mode preserving file permissions and timestamps, and without displaying progress information. | scp -Bpqr /tdggendska10/vig-preview-dmz-prod/docs/sbo/pdf/*ela*L1*TE* dalvarado@localhost:/var/www/html/sbo/2010/teacher/ela/level1 |
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