Commands using sudo sorted by votes

Commands using sudo (537)

sorted by

Programmatic way to find and set your timezone

1. it find your public ip via ifconfig.io 2. than use this IP to request your timezone via worldtimeapi.org 3. and send it to the command timedatectl set-timezone
This is sample output - yours may be different.
1

sudo timedatectl set-timezone $(curl -s worldtimeapi.org/api/ip.txt | sed -n 's/^timezone: //p')

jodumont · 2019-03-09 21:52:32 39

blktrace - generate traces of the i/o traffic on block devices

blktrace is a block layer IO tracing mechanism which provide detailed information about request queue operations up to user space. blkparse will combine streams of events for various devices on various CPUs, and produce a formatted output the the event information. It take the output of above tool blktrace and convert those information into fency readable form. Show Sample Output

This is sample output - yours may be different.

  8,0    1      307    16.300038018   364  G WFS 214877536 + 8 [dmcrypt_write]
  8,0    1      308    16.300038546   364  P   N [dmcrypt_write]
  8,0    1      309    16.300039823   364  I WFS 214877536 + 8 [dmcrypt_write]
  8,0    1      310    16.300040693   364  U   N [dmcrypt_write] 1
  8,0    1      311    16.300041212   364  D  WS 214877536 + 8 [dmcrypt_write]
  8,0    6     6055    16.743540891     0  C   R 581944 + 8 [0]
  8,0    7      478    16.743294229  1394  A   R 581944 + 8 <- (8,5) 80184
  8,0    7      479    16.743295236  1394  Q   R 581944 + 8 [ls]
  8,0    7      480    16.743300616  1394  G   R 581944 + 8 [ls]
  8,0    7      481    16.743302315  1394  I   R 581944 + 8 [ls]
  8,0    7      482    16.743304891  1394  D   R 581944 + 8 [ls]
  8,0    6     6056    18.155362789  1532  C   W 200588584 + 8 [0]
  8,0    1      312    18.155288246   364  A   W 200588584 + 8 <- (8,5) 200086824
  8,0    1      313    18.155289363   364  Q   W 200588584 + 8 [dmcrypt_write]
  8,0    1      314    18.155296277   364  G   W 200588584 + 8 [dmcrypt_write]
  8,0    1      315    18.155297452   364  P   N [dmcrypt_write]
  8,0    1      316    18.155299709   364  I   W 200588584 + 8 [dmcrypt_write]
  8,0    1      317    18.155300975   364  U   N [dmcrypt_write] 1
  8,0    1      318    18.155302739   364  D   W 200588584 + 8 [dmcrypt_write]
  8,0    0        1 1266874889.707513405   364  A  WS 214877096 + 8 <- (8,5) 214375336
  8,0    0        2 1266874889.707514373   364  Q  WS 214877096 + 8 [dmcrypt_write]
  8,0    0        3 1266874889.707518565   364  G  WS 214877096 + 8 [dmcrypt_write]
  8,0    0        4 1266874889.707519046   364  P   N [dmcrypt_write]
  8,0    0        5 1266874889.707519640   364  A  WS 214877104 + 8 <- (8,5) 214375344
  8,0    0        6 1266874889.707519776   364  Q  WS 214877104 + 8 [dmcrypt_write]
  8,0    0        7 1266874889.707521386   364  M  WS 214877104 + 8 [dmcrypt_write]
  8,0    0        8 1266874889.707521635   364  A  WS 214877112 + 8 <- (8,5) 214375352
  8,0    0        9 1266874889.707522030   364  Q  WS 214877112 + 8 [dmcrypt_write]
  8,0    0       10 1266874889.707522365   364  M  WS 214877112 + 8 [dmcrypt_write]
  8,0    0       11 1266874889.707522530   364  A  WS 214877120 + 8 <- (8,5) 214375360
  8,0    0       12 1266874889.707522636   364  Q  WS 214877120 + 8 [dmcrypt_write]
  8,0    0       13 1266874889.707522845   364  M  WS 214877120 + 8 [dmcrypt_write]
  8,0    0       14 1266874889.707522975   364  A  WS 214877128 + 8 <- (8,5) 214375368
  8,0    0       15 1266874889.707523072   364  Q  WS 214877128 + 8 [dmcrypt_write]
  8,0    0       16 1266874889.707523245   364  M  WS 214877128 + 8 [dmcrypt_write]
  8,0    0       17 1266874889.707524366   364  I  WS 214877096 + 40 [dmcrypt_write]
  8,0    0       18 1266874889.707525418   364  U   N [dmcrypt_write] 1
  8,0    0       19 1266874889.707526516   364  D  WS 214877096 + 40 [dmcrypt_write]
CPU0 (8,0):
 Reads Queued:         303,     1212KiB	 Writes Queued:         752,     3464KiB
 Read Dispatches:      277,     1196KiB	 Write Dispatches:       68,      272KiB
 Reads Requeued:         0		 Writes Requeued:        26
 Reads Completed:        0,        0KiB	 Writes Completed:        0,        0KiB
 Read Merges:           22,       88KiB	 Write Merges:          264,     1056KiB
 Read depth:           576        	 Write depth:            36
 IO unplugs:            42        	 Timer unplugs:          11

sudo blktrace -d /dev/sda -o - | blkparse -i -

emphazer · 2019-07-02 06:13:58 39

Using a single sudo to run multiple && arguments

This will also work with bash instead of sh shell sudo bash -c 'apt update -y && apt upgrade -y'
This is sample output - yours may be different.
1

sudo sh -c 'apt update -y && apt upgrade -y'

ioshield · 2019-07-31 04:39:40 293
HOME USE ONLY: Get rid of annoying Polkit password prompts

Although the need to type a password to make certain changes to the system may make perfect sense in a business or educational environment, it makes absolutely zero sense to the home user. So, if you’re at home and would rather get work done than be annoyed by what is essentially Linux’s UAC, then this command is for you.
This is sample output - yours may be different.
1

sudo find /usr/share/polkit-1 -iname “*.policy” -exec sed -i “s/$auth_admin\|auth_admin_keep$/yes/g” {} \;

realkstrawn93 · 2022-03-28 03:00:09 391
Switch on eeepc camera

In some applications on eeepc xandros 7, default OS, video ccamera is not available untill you enter this command
This is sample output - yours may be different.
0

sudo echo 1 > /proc/acpi/asus/camera

orie · 2009-02-07 21:57:01 21
Set date and time
This is sample output - yours may be different.
0

sudo date -s "26 OCT 2008 19:30:00"

cinan · 2009-02-09 20:26:30 8
Allows incoming traffic from specific IP address to port 80
This is sample output - yours may be different.
0

sudo ufw allow proto tcp from 1.2.3.4 to any port 80

patko · 2009-02-26 12:15:10 6
Get a summary of network devices in the system

Basically an improvement on an earlier ethtool command line. Show Sample Output
This is sample output - yours may be different.
```
# eth0
	Speed: Unknown! (65535)
	Link detected: no
# eth1
	Speed: 100Mb/s
	Link detected: yes
# lo
	Link detected: yes
# pan0
	Link detected: yes
# tap1
	Speed: 10Mb/s
	Link detected: no
```
0

for i in /sys/class/net/*; do e=`basename $i`; echo "# $e"; sudo ethtool $e | grep -E "Link|Speed" ; done

hank · 2009-04-25 14:32:08 10
alias for etckeeper, to commit changes after moification of etc

ec commits changes to etckeeper must have etckeeper installed with bzr to use this place inside bashrc can be used from any directory to commit changes
This is sample output - yours may be different.
0

function ec() { ec_var="`pwd`" && cd /etc/ && sudo bzr commit -m "$@" && cd $ec_var; }

professoralex · 2009-05-14 04:34:26 5
Migrate gems from one ruby installation to another

gemInst.sh: #!/bin/bash for i in $@; do if [ "$1" != "$i" ] then echo /newInstall/gem install $1 -v=\"$i\" /newInstall/gem install $1 -v="$i" if [ "$?" != "0" ] then echo -e "\n\nGEM INSTALL ERROR: $1\n\n" echo "$1" > gemInst.err fi fi done
This is sample output - yours may be different.
0

/originalInstall/gem list | tr -d '(),' | xargs -L 1 sudo ./gemInst.sh

snakerdlk · 2009-07-09 21:46:06 4
Play music from pure data

Plays the sound of the file, should sound like *some* kind of music, most files sound like static but some are really cool. variations: sudo cat /dev/sda > /dev/dsp sudo cat /dev/sda5 | aplay Check out http://bbs.archlinux.org/viewtopic.php?id=70937 for more variations! semi-dupe--like http://www.commandlinefu.com/commands/view/985/generate-white-noise but with different syntax and program. Show Sample Output
This is sample output - yours may be different.
```
Playing raw data 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
```
0

sudo cat /usr/share/icons/*/*/* > /dev/dsp

12345678 · 2009-08-06 03:12:27 4
Send SNMP traps
This is sample output - yours may be different.
0

sudo snmptrap -m ALL -v 2c -c public trapserver "" UCD-DEMO-MIB::ucdDemoPublic SNMPv2-MIB::sysLocation.0 s "Just here"

vutcovici · 2009-08-06 17:32:16 20
Add user to group on OS X 10.5

adding users to groups on OS X is not a straightforward process, you need to use the new in built in Directory Service command line utility...
This is sample output - yours may be different.
0

sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username

kulor · 2009-09-03 04:40:10 3
Add another tty device using mknod command

When you need to add another tty device that can automatically start at boot time
This is sample output - yours may be different.
0

sudo mknod /dev/ttyS4 c 4 68

0disse0 · 2009-09-05 09:12:44 4
Manage "legacy" service run control links

Change run control links from start "S" to stop "K" (kill) for whatever run levels in curly braces for a service called "myservice". NEWFN variable is for the new filename stored in the in-line shell. Use different list of run levels (rc*.d, rc{1,3,5}.d, etc.) and/or swap S with K in the command to change function of run control links. Show Sample Output
This is sample output - yours may be different.
```
`/etc/rc2.d/S99myservice' -> `/etc/rc2.d/K99myservice'
`/etc/rc3.d/S99myservice' -> `/etc/rc3.d/K99myservice'
```
0

sudo find /etc/rc{1..5}.d -name S99myservice -type l -exec sh -c 'NEWFN=`echo {} | sed 's/S99/K99/'` ; mv -v {} $NEWFN' \;

zoomgarden · 2010-01-03 00:56:57 4
Delete residues configuration files
This is sample output - yours may be different.
0

dpkg -l | grep ^rc | awk '{print $2}' | sudo xargs dpkg -P

kayowas · 2010-01-24 14:23:37 4
Show the 1000*1000 and 1024*1024 size of HDs on system

I know this sucks in some way but if someone can improve it please be my guest Show Sample Output
This is sample output - yours may be different.
```
        device size with M = 1024*1024:       38166 MBytes
        device size with M = 1000*1000:       40020 MBytes (40 GB)
        device size with M = 1024*1024:       58627 MBytes
        device size with M = 1000*1000:       61475 MBytes (61 GB)
        device size with M = 1024*1024:      238475 MBytes
        device size with M = 1000*1000:      250059 MBytes (250 GB)
```
0

for I in $(awk '/d[a-z]+$/{print $4}' /proc/partitions); do sudo hdparm -I '/dev/'$I; done | grep 'device size with M'

ElAlecs · 2010-03-02 18:56:32 5
compile source & then remove the dev tools you needed to install

on a dpkg managed system this PATTERN will help you generate .deb files from source AND remove all the dev libs you had to install. i hate cluttering up my machine with rouge packages and headers. it would be pretty darn easy on rpm systems as well. i just dont have a rpm managed system to test on right now. NOTE, you sharp ones will notice that it uninstalls the deb you just made! yeah, but the deb is still there to do with it what you want, like re install it. or you can just grep -v after the diff
This is sample output - yours may be different.
0

dpkg-query -l > 1.lst; sudo apt-get install -y build-essential; ./configure; make; sudo checkinstall -D make install; dpkg-query --list > 2.lst; diff 1.lst 2.lst | grep '^>' | awk '{print $3}' | xargs sudo apt-get remove -y --purge

danlangford · 2010-06-16 22:06:07 4
So you are not sure are connected and iither your router or ethernet card are not working.

You don't need this command often and there are other ways to test output but if you want to be sure if your router and ethernet card are working this is one way. Show Sample Output
This is sample output - yours may be different.
```
12:30:25.973064 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:24:2b:60:33:8d, length 302
12:30:25.979560 IP 192.168.1.1.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 303
12:30:48.928099 IP 192.168.1.131.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:24:2b:60:33:8d, length 300
```
0

sudo tcpdump -i eth0 -n port 67 and 68

wsv123456 · 2010-08-18 19:36:06 5
Disabling Spotlight on Mac OS

To re enable just change the "off" for "on" Show Sample Output
This is sample output - yours may be different.
```
Indexing disabled.
```
0

sudo mdutil -a -i off

ElAlecs · 2010-08-26 16:34:20 3
list files/directories in current directory -- sorted by file size in MB

sudo is optional, but to find out about all files, it is nice, or else run as superuser, ie: su -c 'du -sm * | sort -n' Show Sample Output
This is sample output - yours may be different.
```
0	config
1	CVS
1	cd
9	faimirror
424	nfsroot
```
0

sudo du -sm * | sort -n

wabi · 2010-09-24 17:56:41 9
sudo for launching gui apps in background

"The -b (background) option tells sudo to run the given command in the background." -- after it asks you for the password in the foreground. Show Sample Output
This is sample output - yours may be different.
```
#
```
0

sudo -b xterm

shavenwarthog · 2010-10-05 23:03:01 4
Delete duplicated dictionaries in spell check list

When you right click a text box in Firefox and you have installed a few dictionaries you'll see a loooong list of spellcheckers. Most of them are duplicated (symlinks). This command deletes de duplicates and reduces the list.
This is sample output - yours may be different.
0

sudo find /usr/share/hunspell/ -lname '*' -delete

atti · 2010-11-07 15:11:02 6
Stop Grooveshark destroying your CPU

Will limit the amount of CPU time Grooveshark the greedy yet useful Adobe Air app will have. Leaves the UI lagging a little, but crucially does not ruin the audio. Show Sample Output
This is sample output - yours may be different.
```
Process 2927 detected
```
0

sudo cpulimit -e Grooveshark -l 20

poulter7 · 2010-11-15 16:58:50 3
dhcdrop - testing/suppression/tracking false DHCP servers

kill all the (-y) from the interface eth1, not touching the legitimate server with 00:11:22:33:44:55 homepage: http://www.netpatch.ru/dhcdrop.html download: http://www.netpatch.ru/projects/dhcdrop/dhcdrop-0.5.tar.bz2
This is sample output - yours may be different.
0

sudo dhcdrop -i eth1 -y -l 00:11:22:33:44:55

cas_alexi · 2010-11-26 06:20:56 4
‹ First < 9 10 11 12 13 > 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

Delete empty directories recursively

New Maintainer for CommandLineFu

Welcome to Jon H. (@fart), the new maintainer of CommandLineFu. . In the absence of a forum, I encourage people welcome him, here, in the comments. . Also... What would you like to improve/change about the site?

cut audio file

Download a file securely via a remote SSH server

This command will download $file via server. I've used this when FTP was broken at the office and I needed to download some software packages.

Your name backwards

FizzBuzz in one line of Bash

The (in)famous "FizzBuzz" programming challenge, answered in a single line of Bash code. The "|column" part at the end merely formats the output a bit, so if "column" is not installed on your machine you can simply omit that part. Without "|column", the solution only uses 75 characters. The version below is expanded to multiple lines, with comments added. for i in {1..100} # Use i to loop from "1" to "100", inclusive. do ((i % 3)) && # If i is not divisible by 3... x= || # ...blank out x (yes, "x= " does that). Otherwise,... x=Fizz # ...set x to the string "Fizz". ((i % 5)) || # If i is not divisible by 5, skip (there's no "&&")... x+=Buzz # ...Otherwise, append (not set) the string "Buzz" to x. echo ${x:-$i} # Print x unless it is blanked out. Otherwise, print i. done | column # Wrap output into columns (not part of the test).

blktrace - generate traces of the i/o traffic on block devices

Check if system is 32bit or 64bit

Needed a quick way to see if my server distro that I setup years ago was running 32bit or not, since with time I had forgotten. Note: does not check _hardware_ e.g. /proc/cpuinfo but rather the kernel installed

Get a list of all browsable Samba shares on the target server.

drop first column of output by piping to this

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