All commands (14,187)
-
This obey that you don't match any broadcast or network addresses and stay between 1.1.1.1 - 254.254.254.254
0echo 254.003.032.3 | grep -P '^((25[0-4]|2[0-4]\d|[01]?[\d]?[1-9])\.){3}(25[0-4]|2[0-4]\d|[01]?[\d]?[1-9])$' -
0cat /proc/version
-
just change 6 to 9 or 12 or more (multiple of 3) to have bigger password Show Sample Output
0openssl rand 6 -base64 -
if you can use this depends on which netapp you have, this netapp is an FAS2020 Show Sample Output
0/usr/bin/snmpwalk -v 1 -c public 10.0.0.22 1.3.6.1.4.1.789.1.21.1.2.1.25.1| awk -F : '{print "netapp temp:" $4 }' -
Delete range of lines. Ex: Line 6 through 66 in .
0sed -i 6,66d <filename> -
0du -s $(ls -l | grep '^d' | awk '{print $9}') | sort -nr
-
This will make a backup of all hidden files and folders in the home folder.
0tar zcpvf backup.tgz $(find $HOME -maxdepth 1 -name '.*' -and -not -name '.') -
At times you will need to safeguard your files. Use OpenSSL's native rc4 encryption to do so. 'nopad' removes padding and 'nosalt' removes random salt being added to the file.
0hashkey=`echo -ne <your-secret> | xxd -p`; openssl rc4 -e -nosalt -nopad -K $hashkey -in myfile.txt -out myfile.enc.txt -
In order to unrar several files in different subfolders, you just need to launch this command in your parent folder in order to have your files ready for manipulation and already extracted; I did not put anything to delete the original rar files
0for i in `ls` ; do cd $i ; pwd; for f in `ls *.rar` ; do unrar e $f ; done ; cd .. ; done -
1. Copy the url of the streaming video mms://etc... or http://... 2. Open up a terminal. 3. the command 4. Wait for the stream dump.
0mplayer -dumpstream -dumpfile stream_video_name url -
This version uses subshells.
0(cd olddir && tar -cf - .)|(cd newdir && tar -xpf -) -
0ruby -e 'Dir.glob("*.txt") { |f| File.rename(f,f.gsub("_t","")) }'
-
Replace thread_link with the link of the thread you want to download images of.
0wget thread_link -qO - | sed 's/\ /\n/g' | grep -e png -e jpg | grep href | sed 's/href\=\"/http:/g' | sed 's/"//g' | uniq | xargs wget -
We had a number of git tags named similarly to: 2016.12.13.devel.feature 2016.12.14.master.release But we have multiple developers making commits and tags for testing purposes. I wanted to reduce the number of tags that displayed on our cloud hosting server when doing a deployment.
0git ls-remote --tags origin | awk '/^(.*)(\s+)(.*)(YOUR-TAG-SPECIFIC-SEARCH-TERM-HERE)(.*)(-+)(.*)[^{}]$/ {print ":" $2}' | xargs git push origin -
Some sites running on basic web servers don't support the HEAD request, so using "curl -I" on them doesn't work. This will automatically try "curl -I" at first and if that fails with a 4xx or 5xx status code, it falls back to "curl -i" and prints only the headers from that.
0curlh() { x="$(curl -Is -w '%{http_code}' "$@")"; if [[ "$(tail -n 1 <<< "$x")" == [45]* ]]; then curl -is "$@" | awk '{ if (!NF) { exit }; print }'; else head -n -1 <<< "$x"; fi; } -
scare hell out of user of just amuse by playing random .wav short files
0while true; do locate *.wav | sed "{${RANDOM:1:2}q;d;}" | xargs aplay; sleep 10; done &> /dev/null & -
0while true; do sleep .15; head /dev/urandom | tr -dc A-Za-z0-9; done
-
Show temp of all disk with the drivetemp module activate Show Sample Output
0grep -l "drivetemp" /sys/class/hwmon/hwmon*/name | while read f; do printf "%s(%-.2s°C)\n" "`<${f%/*}/device/model`" "`<${f%/*}/temp1_input`"; done -
Use graphicsmagick or imagemagick to composite a RGBA image over a flat white background and discard the alpha channel.
0composite -compose Over rgba.png -tile xc:white -geometry `identify rgba.png | sed 's/[^ ]* [^ ]* \([^ ]*\) .*/\1/g'` rgb-white.png -
You can use that to create a excludefile for nmap, to find hosts, with no DHCP lease in your DHCP range. Show Sample Output
0egrep "^lease" /var/lib/dhcp/db/dhcpd.leases |awk '{ print $2 }' -
Compare the disk space for the new and old drive
0blockdev --getsize64 /dev/sd[ab] -
enter our information on the content file. Show Sample Output
0FILE=$(tempfile 2>/dev/null || echo .$RANDOM) -
with a semicolon text file map, apply multiple replace to a single file Show Sample Output
0cat table-mv.txt | perl -pe 's{([^;]+);([^;]+)}{tbl$1/tbl$2}' | perl -pe 's{(\S+)}{perl -i -pe #s/$1/g# xxx.sql}' | tr "#" "\'" | bash -
">>" appends to the file ">" replaces the entire file make sure to use ">>" Show Sample Output
0sudo echo "package url" >> /etc/apt/sources.list -
0cat item_list | xargs -n1 -P<n> process_item
- ‹ First < 421 422 423 424 425 > Last ›
What's this?
commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
Check These Out
Stay in the loop…
- Follow the Tweets.
-
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10 - Subscribe to the feeds.
-
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
- » all commands
- » commands with 3 up-votes (commandlinefu3)
- » commands with 10 up-votes (commandlinefu10)