Commands using sudo sorted by votes

Commands using sudo (537)

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find rcs locked file in a given folder

find the files locked by rcs utility Show Sample Output
This is sample output - yours may be different.
```
/etc/RCS/fstab,v
```
0

find /path/to/folder/ -mindepth 1 -maxdepth 2 -name "*,v" -exec sudo rlog -L -R {} \;

bouktin · 2011-01-13 16:07:42 4
tcptraceroute alternative for udp packets

-T = traceroute -V = verbose --tr-stop = exit when target is reached -n = don't do reverse lookups (faster) -2 = udp -p 53 = destination port 53 (dns), change to your needs Useful when trying to debug a network with complex routing rules and/or multiple gateways.
This is sample output - yours may be different.
0

sudo hping3 -TV --tr-stop -n -2 -p 53 ns1.server.tld

forcefsck · 2011-01-14 10:12:37 3
Let yourself read the logs under /var/log/apache2 (on Debian)
This is sample output - yours may be different.
0

sudo usermod -a -G adm "$(whoami)"

unixmonkey17279 · 2011-02-18 16:01:59 3
archlinux: updates repository mirrors according to most up to date mirrors, then speed

Requires 'reflector' package from official repository. '5' in the example is the number of mirrors you want in the mirrorlist, could be other numbers of course.
This is sample output - yours may be different.
0

sudo reflector -l 5 -r -o /etc/pacman.d/mirrorlist

ibnarrashid · 2011-03-20 20:33:35 3
archlinux: clears package cache of uninstalled packages

Clears the package cache of all uninstalled packages. Does not remove package configuration files in user's home directory.
This is sample output - yours may be different.
0

sudo pacman -Sc

ibnarrashid · 2011-03-20 20:55:32 3
archlinux: clear the package cache of all packages

Clears the package cache of all packages, installed and uninstalled packages. Do NOT USE if you might want to downgrade a package later.
This is sample output - yours may be different.
0

sudo pacman -Scc

ibnarrashid · 2011-03-20 20:57:42 3
archlinux: remove a package completely from the system.

Removes the package, 'packagename' in the example ,from your system. '-R' is the actual removal option, 'n' is for removing backup configuration files saved by pacman, and 's' is for removing the dependencies of the given package which are not required by other packages. pacman does not remove configuration files, etc. created by the package.
This is sample output - yours may be different.
0

sudo pacman -Rns packagename

ibnarrashid · 2011-03-20 21:07:14 8
Find out which process uses an old lib and needs a restart after a system update
This is sample output - yours may be different.
0

sudo lsof | grep 'DEL.*lib' | cut -f 1 -d ' ' | sort -u

sammcj · 2011-05-30 00:17:11 4
Install mysql-2.8.1 rubygem on Mac OS X 10.6 (Snow Leopard)
This is sample output - yours may be different.
0

sudo env ARCHFLAGS="-arch x86_64" gem install mysql

evandrix · 2011-07-05 22:20:03 6
Extract a .gz file with privilege

Extracting .gz files and placing the output in another directory in one command line is convenient thing. I just followed some how-to to install Nagios on Ubuntu Lucid Lynx but they give the method to install from archives. I wished to install from the repository. If you do so some files are missing. I've not tested yet but this is an example command line I did to extract sudo sh -c 'gunzip -c /usr/share/doc/nagios3-common/examples/template-object/templates.cfg.gz > /etc/nagios3/objects/templates.cfg' We need privilege to write the destination file. Show Sample Output
This is sample output - yours may be different.
```
No output.
```
0

sudo sh -c 'gunzip -c source.gz > destination'

UnixNeko · 2011-07-05 23:51:01 4
Boot from a block device without giving root privilege to Virtual Box

Usage: VBoxBlockBoot [Virtual_Machine] [Block_device] Eg: VBoxBlockBoot WinXP /dev/sdc In another words vm=usb; usb=sdc;sudo umount /dev/$usb* ; sudo chmod 777 /dev/$usb ; VBoxManage storageattach $vm --medium ~/raw-HD-4-VB/$usb.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm $vm Where vm --> Name of the virtual machine to start usb --> Block device to use. (/dev/sdc) This can used after setup up a boot loader on to my USB pen drive or HDD (After creating Live USB). Here root privilege is needed but not granted to Virtual Box. Thus we can access all our VM.( If we run VBox as root we can't access our VMs). Root privilege is used to - Unmount the storage device - Chmod to full access (777) Requirements:- 1. Device information file (rawvmdk file) created by the following command. Need to run only once. Not bad to run many. VBoxCreateRawDisk() { VBoxManage internalcommands createrawvmdk -filename ~/.rawHD4VB_`basename "$1"`.vmdk -rawdisk "$1"; } 2. Root privilege to umount & chmod 3. Real storage medium (ie /dev/*) (Non-virtual such as USB HD, pen drive, a partition) 4. A virtual m/c already available (here "usb") vm=usb; usb=sdc;sudo umount /dev/$usb* ; sudo chmod 777 /dev/$usb ; VBoxManage storageattach $vm --medium ~/raw-HD-4-VB/$usb.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm $vm VBoxBlockBoot() { sudo umount "$2"*; sudo chmod 777 "$2"; VBoxManage storageattach "$1" --medium ~/.rawHD4VB_`basename "$2"`.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm "$1"; } Show Sample Output
This is sample output - yours may be different.
```
$ VBoxBlockBoot usb /dev/sdc
umount: /dev/sdc: not mounted
Oracle VM VirtualBox Command Line Management Interface Version 3.2.12
(C) 2005-2010 Oracle Corporation
All rights reserved.

Oracle VM VirtualBox Command Line Management Interface Version 3.2.12
(C) 2005-2010 Oracle Corporation
All rights reserved.

Waiting for the VM to power on...
VM has been successfully started.

$ 
```
0

VBoxBlockBoot() { sudo umount "$2"*; sudo chmod 777 "$2"; VBoxManage storageattach "$1" --medium ~/.rawHD4VB_`basename "$2"`.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm "$1";}

totti · 2011-07-29 13:04:19 4
Remove old kernels and header data in Ubuntu/Debian

Removes all kernels and corresponding packages except of the one you're currently using.
This is sample output - yours may be different.
0

sudo apt-get -y purge $(dpkg --get-selections | awk '((/^linux-/) && (/[0-9]\./) && (!/'"`uname -r | sed "s/-generic//g"`"'/)) {print $1}')

dakira · 2011-08-04 14:02:02 6
Sniff who are using wireless. Use wireshark to watch out.pcap :]
This is sample output - yours may be different.
0

sudo ettercap -T -w out.pcap -i wlan0 -M ARP // //

bitbasher · 2011-08-20 23:38:13 4
Displays All TCP and UDP Connections
This is sample output - yours may be different.
0

sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep udp && echo && sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep tcp

brando56894 · 2011-09-08 18:54:36 3
Find directories with lots of files in them

Find which directories on your system contain a lot of files. Edit: much shorter and betterer with -n switch. Show Sample Output
This is sample output - yours may be different.
```
2958	/var/www/vhosts/example.com/dir1
2259	/usr/share/man/man3
1283	/var/www/vhosts/example.com/dir2
1124	/usr/share/man/man3p
1091	/usr/share/man/man1
861	/var/www/vhosts/example.com/dir3
763	/usr/bin
717	/var/www/vhosts/example.com/dir4
```
0

sudo find / -type f | perl -MFile::Basename -ne '$counts{dirname($_)}++; END { foreach $d (sort keys %counts) {printf("%d\t%s\n",$counts{$d},$d);} }'|sort -rn | tee /tmp/sortedfilecount.out | head

tamouse · 2011-09-14 19:41:19 3
Install 4 new package files

after kernel build with make deb-pkg, I like to install the 4 newest packages that exist in the directory. Beware: might be fewer for you....
This is sample output - yours may be different.
0

sudo dpkg -i `ls -tr *.deb | tail -n4`

_john · 2011-10-09 14:20:11 3
Capture all tcp and udp packets in LAN, except packets coming to localhost (192.168.1.2)
This is sample output - yours may be different.
0

sudo tcpdump -n -i eth0 -w data.pcap -v tcp or udp and 'not host 192.168.1.2'

anhpht · 2011-10-12 00:20:52 3
Unmount all CIFS drives

Unmounts all CIFS-based network drives. Very nice for shutting down network mounts on a Linux laptop just prior to going to sleep. Show Sample Output
This is sample output - yours may be different.
```
UNMOUNTING /home/danf/gmounts/G... [DONE]
UNMOUNTING /home/danf/gmounts/H... [DONE]
UNMOUNTING /home/danf/gmounts/N... [DONE]
```
0

for D in `mount -lt cifs | sed 's/.*on $\/.\+$ type.*/\1/'`; do echo -n "UNMOUNTING $D..."; sudo umount $D; echo " [DONE]"; done;

crazedsanity · 2011-10-19 18:14:19 4
Startup Nessus and initialize plugins on backtrack5

Starts the Nessus daemon, downloads and processes the plugins.
This is sample output - yours may be different.
0

sudo /opt/nessus/sbin/nessusd

ozzy · 2011-10-22 19:04:43 3
Get status of LXC

This short snippet outputs the state of all containers available on your system. It is quite helpful to see which ones are running and which are stopped. Please notice that the "sort -u" is needed, otherwise running containers will be reported twice (see output of "lxc-ls" on its own for why) Show Sample Output
This is sample output - yours may be different.
```
'lenny-pkg' is STOPPED
'lenny-www' is RUNNING
'squeeze-partial-pkg' is STOPPED
'squeeze-pkg' is RUNNING
```
0

lxc-ls | sort -u | xargs -i sudo lxc-info -n {}

Rhonda · 2011-10-28 11:10:02 5
DD with progressbar using pv for backing up entire block device
This is sample output - yours may be different.
0

sudo dd if=/dev/block/device bs=1MB | pv -s `sudo blockdev --getsize64 /dev/block/device' | gzip -9 > output.img.gz

hur1can3 · 2011-12-05 23:21:59 3

Find and sort by Resident Size of each process on the system in MB

Show Sample Output

sudo ps aux --sort:rss | awk '{print $2"\t"$11": "$6/1024" MB"}' | column -t | less

threv · 2011-12-08 17:23:18 3

Check a port's state on a given host

Check to see if a port is open or closed on a given host. Show Sample Output

checkport() { sudo nmap -sS -p $1 $2 }

peterRepeater · 2011-12-13 11:46:15 7

CPU Frequency/Speed Set

Lets you change/set a governor to handle the frequency of your CPU. Available governors are: "powersave", "conservative", "ondemand", "performance", and "userspace".
This is sample output - yours may be different.
0

sudo cpupower frequency-set -g <frequency governor>

NBDTJFZGSHDSGHE · 2012-01-27 07:48:10 3
Manual CPU Frequency/Speed/Clock Set

Allows for manual set of the CPU's frequency. First look at "cpupower frequency-info" for all the available frequency steps your processor can be set at. e.g. sudo cpupower frequency-set -f 1100MHz
This is sample output - yours may be different.
0

sudo cpupower frequency-set -f <frequency in MHz>

NBDTJFZGSHDSGHE · 2012-01-27 07:56:34 3
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Grep syslog today last hour

Uses date to grep de logfile for today and uses it to get the last hour logs. Can be used to get last minute logs or today's logs.

list files recursively by size

Runs previous command replacing foo by bar every time that foo appears

Very useful for rerunning a long command changing some arguments globally. As opposed to ^foo^bar, which only replaces the first occurrence of foo, this one changes every occurrence.

Query ip pools based on successive netnames via whois

Useful if you f.i. want to block/allow all connections from a certain provider which uses successive netnames for his ip blocks. In this example I used the german Deutsche Telekom which has DTAG-DIAL followed by a number as netname for the dial in pools. There are - as always ;) - different ways to do this. If you have seq available you can use $ net=DTAG-DIAL ; for i in `seq 1 30`; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done or without seq you can use bash brace expansion $ net=DTAG-DIAL ; for i in {1..30}; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done or if you like while better than for use something like $ net=DTAG-DIAL ; i=1 ; while true ; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; test $i = 30 && break ; i=$(expr $i + 1) ; done and so on.

Print trending topics on Twitter

To find the LDAP clients connected to LDAP service running on Solaris

Stream YouTube URL directly to MPlayer

A function for streaming youtube to mplayer. The option "-g" for youtube-dl tells it to output the direct video URL, instead of downloading the video. "-fs" tells MPlayer to go FullScreen, and "-quit" makes it less verbose. Requires: youdube-dl ( http://bitbucket.org/rg3/youtube-dl/ ) (Tested in zsh)

Run the last command as root - (Open)Solaris version with RBAC

locating packages held back, such as with "aptitude hold "

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.

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Commands using sudo (537)

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