Commands using sudo sorted by votes

Commands using sudo (537)

sorted by

du with colored bar graph

i'm using gawk, you may get varying mileage with other varieties. You might want to change the / after du to say, /home/ or /var or something, otherwise this command might take quite some time to complete. Sorry it's so obsfucated, I had to turn a script into a one-liner under 255 characters for commandlinefu. Note: the bar ratio is relative, so the highest ratio of the total disk, "anchors" the rest of the graph. EDIT: the math was slightly wrong, fixed it. Also, made it compliant with older versions of df. Show Sample Output
This is sample output - yours may be different.
```
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| /usr 5.71248% total
|||||||||||||||||||||||||||||||||||| /var 3.19542% total
||||||||||||||||| /home 1.49544% total
||||||||| /lib 0.75594% total
|| /boot 0.154587% total
```
13

t=$(df|awk 'NR!=1{sum+=$2}END{print sum}');sudo du / --max-depth=1|sed '$d'|sort -rn -k1 | awk -v t=$t 'OFMT="%d" {M=64; for (a=0;a<$1;a++){if (a>c){c=a}}br=a/c;b=M*br;for(x=0;x<b;x++){printf "\033[1;31m" "|" "\033[0m"}print " "$2" "(a/t*100)"% total"}'

kevinquinnyo · 2011-12-01 01:21:11 15
Make a file not writable / immutable by root

http://linuxhelp.blogspot.com/2005/11/make-your-files-immutable-which-even.html
This is sample output - yours may be different.
12

sudo chattr +i <file>

rugina · 2010-11-03 02:47:49 6
what model of computer I'm using?
This is sample output - yours may be different.
12

sudo dmidecode | grep Product

bbbco · 2012-02-07 16:26:23 17
Show how old your linux OS installtion is

..not guaranteed to always be accurate but fun to see how old you Linux installation is based on the root partitions file system creation date. Show Sample Output
This is sample output - yours may be different.
```
Filesystem created:       Wed Aug  6 14:43:42 2008
```
12

sudo tune2fs -l $(df -h / |(read; awk '{print $1; exit}')) | grep -i created

thechile · 2013-08-08 15:18:09 17
Using a single sudo to run multiple && arguments

Bash's here string
This is sample output - yours may be different.
12

sudo -s <<< 'apt update -y && apt upgrade -y'

metropolis · 2019-08-07 14:03:30 70
print indepth hardware info

wanna know something about your hardware? how about EVERYTHING?? then this should do ya well
This is sample output - yours may be different.
9

sudo dmidecode | more

oreo · 2009-02-16 03:32:30 93
Make redirects to localhost via /etc/hosts more interesting

Normally when a site is blocked through /etc/hosts, traffic is just being redirected to a non-existent server that isn't going to respond. This helps get your point across a little more clearly than a browser timeout. Of course you could use any number of codes: http://en.wikipedia.org/wiki/List_of_HTTP_status_codes Obviously, this command can be added to init-rc.d, and more sophisticated responses can be given. Seems noteworthy to mention that the information sent from the browser can be parsed using the bash READ builtin (such as 'while read -t 1 statement; do parsing'), and the connection stays open until the script exits. Take care that you must use EXEC:'bash -c foo.sh', as 'execvp' (socat's method for executing scripts) invokes 'sh', not 'bash'. Show Sample Output
This is sample output - yours may be different.
```
$ lynx 127.0.0.1:81
Making HTTP connection to 127.0.0.1:81
Sending HTTP request.
HTTP request sent; waiting for response.
Alert!: HTTP/1.1 503 Service Unavailable;
Data transfer complete
```
9

sudo socat TCP4-LISTEN:80,bind=127.0.0.1,fork EXEC:'echo "HTTP/1.1 503 Service Unavailable";'

adelie42 · 2011-05-02 19:31:56 6
Capture all plaintext passwords
This is sample output - yours may be different.
9

sudo tcpdump port http or port ftp or port smtp or port imap or port pop3 or port telnet -l -A | egrep -i -B5 'pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|username:|password:|login:|pass |user '

wuseman1 · 2019-02-03 05:13:58 72
Command to logout all the users in one command
This is sample output - yours may be different.
9

sudo who | awk '!/root/{ cmd="/sbin/pkill -KILL -u " $1; system(cmd)}'

tg0000 · 2021-02-03 13:35:52 533
Does a full update and cleaning in one line
This is sample output - yours may be different.
8

sudo apt-get update && sudo apt-get upgrade && sudo apt-get autoclean && sudo apt-get autoremove

Skyrell · 2009-02-16 04:21:07 67
List your sudo rights

List the commands you have the right to use with sudo. Show Sample Output
This is sample output - yours may be different.
```
User raphink may run the following commands on this host:
    (ALL) ALL
    (ALL) NOPASSWD: /usr/bin/apt-get, /usr/bin/auto-get, /usr/bin/dpkg, /usr/bin/dselect, /usr/sbin/dpkg-reconfigure
    (root) NOPASSWD: /usr/sbin/pbuilder
```
8

sudo -l

raphink · 2009-02-18 14:17:39 10
Disable annoying sound emanations from the PC speaker

To ensure that it will never come back, you can edit /etc/modprobe.d/blacklist Add "blacklist pcspkr" sans quotes
This is sample output - yours may be different.
8

sudo rmmod pcspkr

zombiedeity · 2009-07-17 18:21:19 7
Clear filesystem memory cache

Found here: http://ubuntuforums.org/showthread.php?t=589975
This is sample output - yours may be different.
8

sync && echo 3 | sudo tee /proc/sys/vm/drop_caches

mariusbutuc · 2011-10-18 15:22:25 19
purge installed but unused linux headers, image, or modules

will purge: only installed apps: /^ii/!d avoiding current kernel stuff: /'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d using app names: s/^[^ ]* [^ ]* $[^ ]*$.*/\1/ avoiding stuff without a version number: /[0-9]/!d
This is sample output - yours may be different.
7

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/$.*$-$[^0-9]\+$/\1/")"'/d;s/^[^ ]* [^ ]* $[^ ]*$.*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

plasticdoc · 2009-06-19 10:11:00 9
Use a decoy while scanning ports to avoid getting caught by the sys admin :9

Scan for open ports on the target device/computer (192.168.0.10) while setting up a decoy address (192.168.0.2). This will show the decoy ip address instead of your ip in targets security logs. Decoy address needs to be alive. Check the targets security log at /var/log/secure to make sure it worked.
This is sample output - yours may be different.
7

sudo nmap -sS 192.168.0.10 -D 192.168.0.2

sedcommand · 2009-07-14 17:37:34 3
Resets your MAC to a random MAC address to make you harder to find.

Next time you are leaching off of someone else's wifi use this command before you start your bittorrent ...for legitimate files only of course. It creates a hexidecimal string using md5sum from the first few lines of /dev/urandom and splices it into the proper MAC address format. Then it changes your MAC and resets your wireless (wlan0:0). Show Sample Output
This is sample output - yours may be different.
```
wlan0:0   Link encap:Ethernet  HWaddr 00:07:5a:df:41:5c  #<<-w00t new random MAC-<<#
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
```
7

ran=$(head /dev/urandom | md5sum); MAC=00:07:${ran:0:2}:${ran:3:2}:${ran:5:2}:${ran:7:2}; sudo ifconfig wlan0 down hw ether $MAC; sudo ifconfig wlan0 up; echo ifconfig wlan0:0

workingsmart · 2009-07-16 16:21:44 5
Extract dd-image from VirtualBox VDI container and mount it

Tested with NTFS and found on this site: http://forensicir.blogspot.com/2008/01/virtualbox-and-forensics-tools.html The first 32256 bytes is the MBR
This is sample output - yours may be different.
7

vditool COPYDD my.vdi my.dd ; sudo mount -t ntfs -o ro,noatime,noexex,loop,offset=32256 my.dd ./my_dir

Cowboy · 2009-08-14 21:33:43 9
Get the size of all the directories in current directory (Sorted Human Readable)

This allows the output to be sorted from largest to smallest in human readable format.
This is sample output - yours may be different.
7

sudo du -ks $(ls -d */) | sort -nr | cut -f2 | xargs -d '\n' du -sh 2> /dev/null

Code_Bleu · 2009-08-17 22:21:09 53
connect via ssh using mac address

Instead of looking for the right ip address, just pick whatever address you like and set a static ip mapping.
This is sample output - yours may be different.
7

sudo arp -s 192.168.1.200 00:35:cf:56:b2:2g temp && ssh root@192.168.1.200

svg · 2009-09-11 07:49:28 8
32 bits or 64 bits?
This is sample output - yours may be different.
7

sudo lshw -C cpu|grep width

sliceoflinux · 2009-09-24 11:43:00 6
Mount a Windows share on the local network (Ubuntu) with user rights and use a specific samba user
This is sample output - yours may be different.
7

sudo mount -t cifs -o user,username="samba username" //$ip_or_host/$sharename /mnt

ludogomez · 2009-11-23 15:26:23 8
Determine what an process is actually doing
This is sample output - yours may be different.
7

sudo strace -pXXXX -e trace=file

tolginho · 2009-12-01 15:27:48 6
Reboot as a different OS in Grub

This will reboot as the Grub 2 option.
This is sample output - yours may be different.
7

echo "savedefault --default=2 --once" | grub --batch; sudo reboot

matthewbauer · 2010-05-02 03:06:23 4

ARP Scan

A much quicker and (not dirtier) option. use the man page for help. On linux/ubuntu you will need to `sudo apt-get -y install arp-scan`. Show Sample Output

sudo arp-scan -l

linuxrawkstar · 2011-02-21 21:58:27 17

Stop procrastination on Facebook.com

or echo '127.0.0.1 facebook.com' | sudo tee -a /etc/hosts Do not execute this command if you don't know what you are doing.
This is sample output - yours may be different.
7

sudo sh -c "echo '127.0.0.1 www.facebook.com' >> /etc/hosts"

devalnor · 2012-01-16 14:06:51 6
< 1 2 3 4 > 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.

Share Your Commands

Check These Out

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Get your outgoing IP address

urlencoding with one pure BASH builtin

opposite of https://www.commandlinefu.com/commands/view/10014/urldecoding-with-one-pure-bash-builtin ;-)

List the binaries installed by a Debian package

This shell function displays a list of binaries contained in an installed package; works on Debian based Linux distributions.

Download Youtube video with wget!

Nothing special required, just wget, sed & tr!

Convert a Python interactive session to a python script

Used to copy and paste a terminal buffer of a python interactive session into an editor

Convert CSV to JSON with miller

Using the csv tool `miller` you can transform a csv file into a json array of objects, where the properties are the values of the csv header line and the values are the values of the subsequent lines.

defragment files

Thanks to flatcap for optimizing this command. This command takes advantage of the ext4 filesystem's resistance to fragmentation. By using this command, files that were previously fragmented will be copied / deleted / pasted essentially giving the filesystem another chance at saving the file contiguously. ( unlike FAT / NTFS, the *nix filesystem always try to save a file without fragmenting it ) My command only effects the home directory and only those files with your R/W (read / write ) permissions. There are two issues with this command: 1. it really won't help, it works, but linux doesn't suffer much (if any ) fragmentation and even fragmented files have fast I/O 2. it doesn't discriminate between fragmented and non-fragmented files, so a large ~/ directory with no fragments will take almost as long as an equally sized fragmented ~/ directory The benefits i managed to work into the command: 1. it only defragments files under 16mb, because a large file with fragments isn't as noticeable as a small file that's fragmented, and copy/ delete/ paste of large files would take too long 2. it gives a nice countdown in the terminal so you know how far how much progress is being made and just like other defragmenters you can stop at any time ( use ctrl+c ) 3. fast! i can defrag my ~/ directory in 11 seconds thanks to the ramdrive powering the command's temporary storage bottom line: 1. its only an experiment, safe ( i've used it several times for testing ), but probably not very effective ( unless you somehow have a fragmentation problem on linux ). might be a placebo for recent windows converts looking for a defrag utility on linux and won't accept no for an answer 2. it's my first commandlinefu command

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Play radio stream with mplayer

Above command will play Virgin Radio Dubai

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)
» commands using sudo

Commands using sudo (537) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands using sudo (537)

sorted by