Commands using sudo sorted by votes

Commands using sudo (537)

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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 16
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 13:35:52 530
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
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Marks all manually installed deb packages as automatically installed.

An alternative without aptitude.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Go to parent directory of filename edited in last command

Uses the last argument of the last executed command, and gets the directory name from it. Use $!:t for the filename alone, without the dirname.

Multiplication table

The multiplication table for math study

Watch for when your web server returns

If your web server is down, this command will periodically attempt to connect to it. If the output is blank, your server is not yet up. If you see HTML, your server is up. Obviously, you need to replace the Google URL with your web server URL... * 'watch' -- a command for re-executing a command and displaying the output * '-n 15' -- tells watch to redo the command every 15 seconds * 'curl' -- a handy utility for getting the source of a web page * '-s' -- tells curl to be silent about failing * '--connect-timeout 10' -- Try to connect for 10 seconds

Identify differences between directories (possibly on different servers)

This can be much faster than downloading one or both trees to a common servers and comparing the files there. After, only those files could be copied down for deeper comparison if needed.

Find out my Linux distribution name and version

raw MySQL output to use in pipes

-N removes header -s removes separator chars -r raw output After using these options, the MySQL ouptut can be used with pipes very easily

Stripping ^M at end of each line for files

Output Detailed Process Tree for any User

An easy function to get a process tree listing (very detailed) for all the processes of any gived user. This function is also in my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

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Commands using sudo (537)

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