Commands using sudo sorted by votes

Commands using sudo (537)

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Simulate slow network connection locally

Replace 500ms by the desired delay. To remove it: sudo tc qdisc del dev lo root netem delay 500ms
This is sample output - yours may be different.
7

sudo tc qdisc add dev lo root netem delay 500ms

caiosba · 2012-11-05 05:29:51 4
Change tha mac adresse

eth0 = the name of the interface 00:01:02:03:04:05 = the new mac adresse the same thing for wireless card $ sudo iwconfig eth1 hw ether 00:01:02:03:04:05
This is sample output - yours may be different.
6

sudo ifconfig eth0 hw ether 00:01:02:03:04:05

momitov · 2009-06-04 09:02:35 9
Visualizing system performance data
This is sample output - yours may be different.
6

(echo "set terminal png;plot '-' u 1:2 t 'cpu' w linespoints;"; sudo vmstat 2 10 | awk 'NR > 2 {print NR, $13}') | gnuplot > plot.png

grokskookum · 2009-09-23 16:40:13 12

Refresh the cache of font directory , usefull after you download font (.ttf or other) from various website and you don't want to reboot or relogin . Close your word processor before using the command , after the refresh reopen your word processor , new fonts is avaible ! Show Sample Output

This is sample output - yours may be different.

gnu@robby:~/.fonts$ sudo fc-cache -f -v
/usr/share/fonts: caching, new cache contents: 0 fonts, 4 dirs
/usr/share/fonts/X11: caching, new cache contents: 0 fonts, 6 dirs
/usr/share/fonts/X11/100dpi: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/X11/75dpi: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/X11/Type1: caching, new cache contents: 83 fonts, 0 dirs
/usr/share/fonts/X11/encodings: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/X11/encodings/large: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/X11/misc: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/X11/util: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cmap: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/truetype: caching, new cache contents: 0 fonts, 16 dirs
/usr/share/fonts/truetype/arphic: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/truetype/freefont: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/truetype/kochi: caching, new cache contents: 4 fonts, 0 dirs
/usr/share/fonts/truetype/latex-xft-fonts: caching, new cache contents: 7 fonts, 0 dirs
/usr/share/fonts/truetype/openoffice: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/thai: caching, new cache contents: 51 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-arabeyes: caching, new cache contents: 39 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-bitstream-vera: caching, new cache contents: 10 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-dejavu: caching, new cache contents: 21 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-indic-fonts-core: caching, new cache contents: 11 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-lao: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-liberation: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-sil-yi: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/unfonts: caching, new cache contents: 4 fonts, 0 dirs
/usr/share/fonts/truetype/unifont: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/wqy: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/type1: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/type1/gsfonts: caching, new cache contents: 35 fonts, 0 dirs
/usr/share/X11/fonts: skipping, no such directory
/usr/local/share/fonts: caching, new cache contents: 0 fonts, 0 dirs
/home/gnu/.fonts: caching, new cache contents: 31 fonts, 0 dirs
/usr/share/texmf/fonts/type1/public/lm: caching, new cache contents: 92 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-malayalam-fonts: skipping, no such directory
/var/cache/fontconfig: cleaning cache directory
/home/gnu/.fontconfig: cleaning cache directory
fc-cache: succeeded

sudo fc-cache -f -v

eastwind · 2009-10-07 11:01:29 8

Disable the ping response

It really disables all ICMP responses not only the ping one. If you want to enable it you can use: sudo -s "echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all"
This is sample output - yours may be different.
6

sudo -s "echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all"

sliceoflinux · 2010-06-22 19:16:43 14
Auto Get Missing Launchpad Keys

You can choose these mirror servers to get gpg keys, if the official one ever goes offline keyserver.ubuntu.com pool.sks-keyservers.net subkeys.pgp.net pgp.mit.edu keys.nayr.net keys.gnupg.net wwwkeys.en.pgp.net #(replace with your country code fr, en, de,etc)
This is sample output - yours may be different.
6

sudo apt-get update 2> /tmp/keymissing; for key in $(grep "NO_PUBKEY" /tmp/keymissing |sed "s/.*NO_PUBKEY //"); do echo -e "\nProcessing key: $key"; gpg --keyserver pool.sks-keyservers.net --recv $key && gpg --export --armor $key |sudo apt-key add -; done

Bonster · 2011-03-30 08:18:54 8
Protect directory from an overzealous rm -rf *

-R Recursively change attributes of directories and their contents. +i to set the immutable bit to prevent even root from erasing or changing the contents of a file.
This is sample output - yours may be different.
6

sudo chattr -R +i dirname

mamue · 2011-05-17 05:05:49 6
View files opened by a program on startup and shutdown

Run this before you run a command in order to see what the command does as it starts. The -c flag is useful here as the PID is unknown before startup. All config files, libraries, logs, ports, etc used by the command as it starts up, (and shuts down) will be captured at 1s intervals and written to a file. Useful for debugging etc. Show Sample Output
This is sample output - yours may be different.
```
sudo lsof -rc httpd >> /tmp/FILE
```
6

sudo lsof -rc command >> /tmp/command.txt

zlemini · 2011-08-03 20:19:53 5
what model of computer I'm using?
This is sample output - yours may be different.
6

sudo hal-get-property --udi /org/freedesktop/Hal/devices/computer --key 'system.hardware.product'

0disse0 · 2012-02-06 19:43:57 6
Erase to factory a pendrive, disk or memory card, and watch the progress
This is sample output - yours may be different.
6

sudo shred -vz -n 0 /dev/sdb

bugmenot · 2012-08-06 22:37:44 5
Cleanup Docker

# Delete all containers docker rm $(docker ps -a -q) # Delete all images docker rmi $(docker images -q)
This is sample output - yours may be different.
6

sudo docker rm $(docker ps -a -q); sudo docker rmi $(docker images -q)

lpalgarvio · 2015-05-20 12:34:40 34
list block devices

Shows all block devices in a tree with descruptions of what they are.
This is sample output - yours may be different.
6

sudo lsblk -o name,type,fstype,label,partlabel,model,mountpoint,size

bugmenot · 2018-04-25 00:16:39 171
Save a copy of all debian packages in the form in which they are installed and configured on your system

A copy of all installed debian packages on your system will be put back together, with all changes in configuration files you made and placed in the current directory. Make sure you have enough disk space (say 2-3 GB). Break any time with Ctrl+C. Show Sample Output
This is sample output - yours may be different.
```
$ ls -1
accountsservice_0.6.45-1ubuntu1.3_amd64.deb
acl_2.2.52-3build1_amd64.deb
acpid_2.0.28-1ubuntu1_amd64.deb
acpi-support_0.142_amd64.deb
...
^C
(Ctrl+C)
```
6

for a in $(sudo dpkg --get-selections|cut -f1); do dpkg-repack $a|awk '{if (system("sleep .5 && exit 2") != 2) exit; print}';done

knoppix5 · 2021-01-17 17:07:02 336
Switch to a user with "nologin" shell

You need sudo privileges for this command. Replace username with actual username.
This is sample output - yours may be different.
5

sudo -u username bash

troelskn · 2009-02-06 00:52:18 22
Remount root in read-write mode.

Saved my day, when my harddrive got stuck in read-only mode.
This is sample output - yours may be different.
5

sudo mount -o remount,rw /

blindgaenger · 2009-03-01 13:36:05 9
Play musical notes from octave of middle C

Are there any creative pieces of music that can be created using beep and the shell? I'd love to hear it!
This is sample output - yours may be different.
5

man beep | sed -e '1,/Note/d; /BUGS/,$d' | awk '{print $2}' | xargs -IX sudo beep -f X -l 500

jnash · 2009-04-01 06:48:48 10
Follow the most recently updated log files

This command finds the 5 (-n5) most frequently updated logs in /var/log, and then does a multifile tail follow of those log files. Alternately, you can do this to follow a specific list of log files: sudo tail -n0 -f /var/log/{messages,secure,cron,cups/error_log} Show Sample Output
This is sample output - yours may be different.
```
==> /var/log/cron <==

==> /var/log/messages <==

==> /var/log/lastlog <==

==> /var/log/wtmp <==

==> /var/log/secure <==

==> /var/log/lastlog <==

==> /var/log/wtmp <==
&#65533;1pts/4ts/4myusermyhost.example.com&#65533;fJ&#65533;&#65533;?
==> /var/log/secure <==
Jul 21 18:36:19 thost sshd[12730]: Accepted password for myuser from 192.168.100.7 port 50066 ssh2
Jul 21 18:36:19 thost sshd[12730]: pam_unix(sshd:session): session opened for user myuser by (uid=0)
```
5

ls -drt /var/log/* | tail -n5 | xargs sudo tail -n0 -f

kanaka · 2009-07-22 14:44:41 22
Clone IDE Hard Disk

This command clone the first partition of the primary master IDE drive to the second partition of the primary slave IDE drive (!!! back up all data before trying anything like this !!!)
This is sample output - yours may be different.
5

sudo dd if=/dev/hda1 of=/dev/hdb2

0disse0 · 2009-09-05 09:16:52 4
Install a LAMP server in a Debian based distribution

The execution of this command will install a LAMP server (Linux, Apache, MySQL and PHP) in a Debian based distribution. For example, in Ubuntu.
This is sample output - yours may be different.
5

sudo tasksel install lamp-server

sliceoflinux · 2009-09-26 08:15:03 8
Disable beep sound from your computer

This command will disable the beep sound from the PC speaker.
This is sample output - yours may be different.
5

echo "blacklist pcspkr"|sudo tee -a /etc/modprobe.d/blacklist.conf

sliceoflinux · 2009-09-27 11:42:47 5
set your ssd disk as a non-rotating medium

if you still get a permissions error using sudo, then nano the file: sudo nano -w /sys/block/sdb/queue/rotational and change 1 to 0 this thread: http://www.ocztechnologyforum.com/forum/showpost.php?p=369836&postcount=15 says that this will "help the block layer to optimize a few decisions"
This is sample output - yours may be different.
5

sudo echo 0 > /sys/block/sdb/queue/rotational

nickleus · 2009-11-27 12:16:17 10
Sync the date of one server to that of another.

(Useful when firewalls prevent you from using NTP.)
This is sample output - yours may be different.
5

sudo date -s "$(ssh user@server.com "date -u")"

rpavlick · 2010-03-31 11:59:27 4

network usage per process

Nethogs groups bandwidth by process. Show Sample Output

sudo nethogs eth0

totti · 2013-01-25 08:20:44 6

dd with progress bar and statistics to gzipped image
This is sample output - yours may be different.
5

sudo dd if=/dev/sdc bs=4096 | pv -s `sudo mount /dev/sdc /media/sdc && du -sb /media/sdc/ |awk '{print $1}' && sudo umount /media/sdc`| sudo dd bs=4096 of=~/USB_BLACK_BACKUP.IMG

juanmi · 2013-02-06 09:29:10 7
Synchronize date and time with a server over ssh

Set Remote Server Date using Local Server Time (push) Show Sample Output
This is sample output - yours may be different.
```
Thu Mar 26 20:24:35 UTC 2015
```
5

ssh user@server sudo date -s @`( date -u +"%s" )`

daryltucker · 2015-03-26 20:25:23 11
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Replace Solaris vmstat numbers with human readable format

% cat ph-vmstat.awk # Return human readable numbers function hrnum(a) { b = a ; if (a > 1000000) { b = sprintf("%2.2fM", a/1000000) ; } else if (a > 1000) { b = sprintf("%2.2fK", a/1000) ; } return(b) ; } # Return human readable storage function hrstorage(a) { b = a ; if (a > 1024000) { b = sprintf("%2.2fG", a/1024/1024) ; } else if (a > 1024) { b = sprintf("%2.2fM", a/1024) ; } return(b) ; } OFS=" " ; $1 !~ /[0-9].*/ {print} $1 ~ /[0-9].*/ { $4 = hrstorage($4) ; $5 = hrstorage($5) ; $9 = hrnum($9) ; $10 = hrnum($10) ; $17 = hrnum($17) ; $18 = hrnum($18) ; $19 = hrnum($19) ; print ; }

list files by testing the ownership

Alternative to mnikhil's ls/awk solution

Exclude inserting a table from a sql import

Starting with a large MySQL dump file (*.sql) remove any lines that have inserts for the specified table. Sometimes one or two tables are very large and uneeded, eg. log tables. To exclude multiple tables you can get fancy with sed, or just run the command again on subsequently generated files.

Random IPv4 address

Recursive replace of directory and file names in the current directory.

no grep, no perl, no pipe. even better in zsh/bash4: $ for i in **/*oldname*; do "mv $i ${i/oldname/newname/}"; done No find, no grep, no perl, no pipe

phpdoc shortcut

A shortcut to generate documentation with phpdoc. Defaults to HTML; optionally to PDF if third argument is given. Stores documentation in cwd under ./docs/. I forget the syntax to the output, -o, option, so this is easier.

Grab the first 3 octets of your ip addresses

For machines that have many ip blocks spanning different Class C's, this will show which ones.

Rename .JPG to .jpg recursively

Recursively rename .JPG to .jpg using standard find and mv. It's generally better to use a standard tool if doing so is not much more difficult.

Decrypt passwords from Google Chrome and Chromium.

Read this before you down voting and comment that it is not working -> Wont work on latest versions ~75> since database file is locked and has to be decrypted. This is useful if you have an old hdd with a chrome installation and want to decrypt your old passwords fast.

Create an alias, store it in ~/.bash_aliases and source your new alias into the ~/.bashrc

This is useful if you use a shell with a lot of other users. You will be able to run "topu" to see your running processes instead of the complete 'top -u username'. Read more on alias: http://man.cx/alias

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Commands using sudo (537)

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