Commands tagged Linux sorted by votes

Commands tagged Linux (265)

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Convert encoding of given files from one encoding to another
This is sample output - yours may be different.
4

iconv -f utf8 -t utf16 /path/to/file

imsaar · 2009-12-01 21:02:58 4
Extract title from HTML files

Case Insensitive! and Works even if the "<title>...</title>" spans over multiple line. Simple! :-) Show Sample Output
This is sample output - yours may be different.
```
Extract title from HTML files | commandlinefu.com
```
4

awk 'BEGIN{IGNORECASE=1;FS="<title>|</title>";RS=EOF} {print $2}' file.html

sata · 2010-04-20 10:54:03 6
Easily decode unix-time (funtion)

More recent versions of the date command finally have the ability to decode the unix epoch time into a human readable date. This function makes it simple to utilize this feature quickly. Show Sample Output
This is sample output - yours may be different.
```
$ utime 1000000000
Sat Sep  8 21:46:40 EDT 2001
```
4

utime { date -d @$1; }

deltaray · 2010-05-12 12:21:15 8
Stop or Start (Restart) a Windows service from a Linux machine

Control (stop, start, restart) a Windows Service from a Linux machine which has the `net` command (provided by samba). Show Sample Output
This is sample output - yours may be different.
```
..
SVCNAME service is stopped.
```
4

net rpc -I ADDRESS -U USERNAME%PASSWORD service {stop|start} SVCNAME

f0rk · 2010-06-29 17:12:36 27
delay execution of a command that needs lots of memory and CPU time until the resources are available

[ 2000 -ge "$(free -m | awk '/buffers.cache:/ {print $4}')" ] returns true if less than 2000 MB of RAM are available, so adjust this number to your needs. [ $(echo "$(uptime | awk '{print $10}' | sed -e 's/,$//' -e 's/,/./') >= $(grep -c ^processor /proc/cpuinfo)" | bc) -eq 1 ] returns true if the current machine load is at least equal to the number of CPUs. If either of the tests returns true we wait 10 seconds and check again. If both tests return false, i.e. 2GB are available and machine load falls below number of CPUs, we start our command and save it's output in a text file. The ( ( ... ) & ) construct lets the command run in background even if we log out. See http://www.commandlinefu.com/commands/view/3115/ .
This is sample output - yours may be different.
4

( ( while [ 2000 -ge "$(free -m | awk '/buffers.cache:/ {print $4}')" ] || [ $(echo "$(uptime | awk '{print $10}' | sed -e 's/,$//' -e 's/,/./') >= $(grep -c ^processor /proc/cpuinfo)" | bc) -eq 1 ]; do sleep 10; done; my-command > output.txt ) & )

michelsberg · 2010-07-13 09:12:11 4
show framebuffer console modes to use in grub vga option

look at /boot/grub/menu.lst for somethig like: ## additional options to use with the default boot option, but not with the ## alternatives ## e.g. defoptions=vga=791 resume=/dev/hda5 ## defoptions=vga=795 # defoptions=vga=873 ## altoption boot targets option ## multiple altoptions lines are allowed ## e.g. altoptions=(extra menu suffix) extra boot options ## altoptions=(recovery) single # altoptions=(verbose mode) vga=775 debug # altoptions=(console mode) vga=ask # altoptions=(graphic mode) quiet splash # altoptions=(recovery mode) single vga=(decimal value) is framebuffer mode Show Sample Output
This is sample output - yours may be different.
```
02: None 00.0: 11001 VESA Framebuffer                           
  [Created at bios.464]
  Unique ID: rdCR.UvN0l5rPwN5
  Hardware Class: framebuffer
  Model: "NVIDIA GW-P/N@CVGD33320LQ0N5:0"
  Vendor: "NVIDIA Corporation"
  Device: "GW-P/N@CVGD33320LQ0N5:0"
  SubVendor: "NVIDIA"
  SubDevice: 
  Revision: "GW-CLK"
  Memory Size: 256 MB
  Memory Range: 0xe0000000-0xefffffff (rw)
  Mode 0x0300: 640x400 (+640), 8 bits
  Mode 0x0301: 640x480 (+640), 8 bits
  Mode 0x0303: 800x600 (+800), 8 bits
  Mode 0x0305: 1024x768 (+1024), 8 bits
...
  Mode 0x0352: 2048x1536 (+8192), 24 bits
  Config Status: cfg=new, avail=yes, need=no, active=unknown
```
4

sudo hwinfo --framebuffer

hute37 · 2010-10-03 14:45:02 6

Get information on your graphics card on linux (such as graphics memory size)

Loop is needed if you have more then one card. Show Sample Output

for I in `/sbin/lspci |awk '/VGA/{print $1}'`;do /sbin/lspci -v -s $I;done

houghi · 2010-10-26 19:02:26 7

SSH Auto-login with password

You need to install "sshpass" for this to work. apt-get install sshpass
This is sample output - yours may be different.
4

sshpass -p "YOUR_PASSWORD" ssh -o StrictHostKeyChecking=no YOUR_USERNAME@SOME_SITE.COM

o0110o · 2013-05-24 14:33:38 13
Fastest segmented parallel sync of a remote directory over ssh

Mirror a remote directory using some tricks to maximize network speed. lftp:: coolest file transfer tool ever -u: username and password (pwd is merely a placeholder if you have ~/.ssh/id_rsa) -e: execute internal lftp commands set sftp:connect-program: use some specific command instead of plain ssh ssh:: -a -x -T: disable useless things -c arcfour: use the most efficient cipher specification -o Compression=no: disable compression to save CPU mirror: copy remote dir subtree to local dir -v: be verbose (cool progress bar and speed meter, one for each file in parallel) -c: continue interrupted file transfers if possible --loop: repeat mirror until no differences found --use-pget-n=3: transfer each file with 3 independent parallel TCP connections -P 2: transfer 2 files in parallel (totalling 6 TCP connections) sftp://remotehost:22: use sftp protocol on port 22 (you can give any other port if appropriate) You can play with values for --use-pget-n and/or -P to achieve maximum speed depending on the particular network. If the files are compressible removing "-o Compression=n" can be beneficial. Better create an alias for the command. Show Sample Output
This is sample output - yours may be different.
```
Transferring file `Maleficent.mkv'
`Maleficent.mkv', got 1890451456 of 9089412898 (20%) 6.82M/s eta:19m
ooooooo...............................ooooooo...............................ooooooo............

# the bar resembles the file being transferred, with 'o' representing data already received
```
4

lftp -u user,pwd -e "set sftp:connect-program 'ssh -a -x -T -c arcfour -o Compression=no'; mirror -v -c --loop --use-pget-n=3 -P 2 /remote/dir/ /local/dir/; quit" sftp://remotehost:22

colemar · 2014-10-17 00:29:34 10
Display full tree information of a single process
This is sample output - yours may be different.
4

pstree -plants $(pidof -s firefox)

cbrchrt · 2018-09-04 12:22:57 423
VMware Server print out the state of all registered Virtual Machines.

I use this command on my machines running VMware Server to print out the state of all registered Virtual machines. Show Sample Output
This is sample output - yours may be different.
```
/opt/vmware/vm1/vm1.vmx = on
/opt/vmware/vm2/vm2.vmx = on
/opt/vmware/vm3/vm3.vmx = off
/opt/vmware/vm4/vm4.vmx = on
```
3

for vm in $(vmware-cmd -l);do echo -n "${vm} ";vmware-cmd ${vm} getstate|awk '{print $2 " " $3}';done

dbart · 2009-02-26 16:45:04 8
Convert your favorite image in xpm for using in grub

* size must be 640?480 pixels * only has 14 colors * save it in XPM format Edit /boot/grub/menu.lst and add splashimage=(hd0,0)/boot/grub/grubimg.xpm make sure for your path name and hard disk
This is sample output - yours may be different.
3

convert image123.png -colors 14 -resize 640x480 grubimg.xpm

starchox · 2009-03-12 22:55:10 7
To have only unique lines in a file
This is sample output - yours may be different.
3

sort file1.txt | uniq > file2.txt

rain · 2009-03-14 20:24:06 18
find listening ports by pid

change 24073 to your pid Show Sample Output
This is sample output - yours may be different.
```
httpd 24073 TCP *:80 (LISTEN)
httpd 24073 TCP *:443 (LISTEN)
```
3

lsof -nP +p 24073 | grep -i listen | awk '{print $1,$2,$7,$8,$9}'

icreed · 2009-05-26 20:47:14 5
Remove newlines from output

Pipe any output to "grep ." and blank lines will not be printed.
This is sample output - yours may be different.
3

cat filename | grep .

fraktil · 2009-08-09 01:00:59 4
How many Linux and Windows devices are on your network?

Shows how many Windows and Linux devices are on your network. May add support for others, but that's all that are on my network right now. Show Sample Output
This is sample output - yours may be different.
```
3 Linux device(s)
2 Window(s) devices
```
3

sudo nmap -F -O 192.168.1.1-255 | grep "Running: " > /tmp/os; echo "$(cat /tmp/os | grep Linux | wc -l) Linux device(s)"; echo "$(cat /tmp/os | grep Windows | wc -l) Window(s) devices"

matthewbauer · 2010-01-10 03:09:56 6
Combining text files into one file
This is sample output - yours may be different.
3

cat *.txt >output.txt

jmcantrell · 2010-04-16 14:06:47 7
kills rapidly spawning processes that spawn faster than you can repeat the killall command

if you dont want to alias also then you can do killall rapidly_spawning_process ; !! ; !! ; !!
This is sample output - yours may be different.
3

alias a=" killall rapidly_spawning_process"; a; a; a;

raj77_in · 2010-05-20 02:33:28 4
Check your unread Gmail from the command line

Just an alternative with more advanced formating for readability purpose. It now uses colors (too much for me but it's a kind of proof-of-concept), and adjust columns. Show Sample Output
This is sample output - yours may be different.
```
John Doe (doe@example.net):              I have found the meaning of life !!!
Suzanne Johnson (suzanne@example.com):   What do you think about 42 ?
Mom (mom@house.ws):                      You didn't accept my facebook invitation
```
3

curl -u username --silent "https://mail.google.com/mail/feed/atom" | awk 'BEGIN{FS="\n";RS="(</entry>\n)?<entry>"}NR!=1{print "\033[1;31m"$9"\033[0;32m ("$10")\033[0m:\t\033[1;33m"$2"\033[0m"}' | sed -e 's,<[^>]*>,,g' | column -t -s $'\t'

frntn · 2011-10-15 23:15:52 4
Unmount all CIFS drives
This is sample output - yours may be different.
3

umount -a -t cifs

jameskirk · 2012-07-10 11:17:12 17
Remove all unused kernels with apt-get

Remove old kernels (*-generic and *-generic-pae) via apt-get on debian/ubuntu based systems. Tested on ubuntu 10.04 - 12.04.
This is sample output - yours may be different.
3

sudo apt-get remove $(dpkg -l|awk '/^ii linux-image-/{print $2}'|sed 's/linux-image-//'|awk -v v=`uname -r` 'v>$0'|sed 's/-generic*//'|awk '{printf("linux-headers-%s\nlinux-headers-%s-generic*\nlinux-image-%s-generic*\n",$0,$0,$0)}')

mtron · 2012-08-15 10:02:12 7
Command to rename multiple file in one go

An entirely shell-based solution (should work on any bourne-style shell), more portable on relying on the rename command, the exact nature of which varies from distro to distro.
This is sample output - yours may be different.
3

for f in ./*.xls; do mv "$f" "${f%.*}.ods"; done

evilsoup · 2013-09-17 01:41:56 7
Show the command line for a PID with ps

Show the command line for a PID with ps
This is sample output - yours may be different.
3

ps h -o %a 21679

BeniBela · 2015-09-27 11:00:07 13
Backup all starred repositories from Github
This is sample output - yours may be different.
3

GITUSER=$(whoami); curl "https://api.github.com/users/${GITUSER}/starred?per_page=1000" | grep -o 'git@[^"]*' | xargs -L1 git clone

wuseman1 · 2022-06-25 20:39:12 470
Display information sent by browser

Have netcat listen on port 8000, point browser to http://localhost:8000/ and you see the information sent. netcat terminates as soon as your browser disconnects. I tested this command on my Fedora box but linuxrawkstar pointed out that he needs to use nc -l -p 8000 instead. This depends on the netcat version you use. The additional '-p' is required by GNU netcat that for example is used by Debian but not by the OpenBSD netcat port used by my Fedora system. Show Sample Output
This is sample output - yours may be different.
```
GET / HTTP/1.0
User-Agent: w3m/0.5.2
Accept: text/html, text/*;q=0.5, image/*, audio/*, application/*
Accept-Encoding: gzip, compress, bzip, bzip2, deflate
Accept-Language: en;q=1.0
Host: localhost:8000
```
2

nc -l 8000

penpen · 2009-03-25 23:09:38 6
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Arch Linux: Always install software without asking

Adding this alias to ~/.bashrc or, better yet, the system-wide /etc/bash.bashrc (as in my setup) will make it possible to not only run pacman as any user without needing to prepend sudo but will also ensure that it always assumes that the user knows what he or she is doing. Not the best thing for large multi-user enterprise setups at all to say the least, but for home (desktop) use, this is a fantastic time-saver.

See n most used commands in your bash history

Permanent mysql ssh tunnel to server

Recurse through directories easily

This is a simple case of recursing through all directories, adding the '.bak' extension to every file. Of course, the 'cp $file $file.bak' could be any code you need to apply to your recursion, including tests, other functions, creating variables, doing math, etc. Simple and clean recursion.

Not a kismet replacement...

If you're like some individuals who rely on ndiswrapper and cannot use kismet, this command may be of service. watch -n .5 "iwlist wlan0 scan | egrep 'ESSID|Encryption'" Or... watch -n .5 "iwlist wlan0 scan | egrep 'ESSID|Encryption' | egrep 'linksys'" :-) Hopefully you'll find some dd-wrt compatible routers.

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following: rsync:: (Everyone seems to like -z, but it is much slower for me) -a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files. -H: preserves hard-links -A: preserves ACLs -X: preserves extended attributes -x: don't cross file-system boundaries -v: increase verbosity --numeric-ds: don't map uid/gid values by user/group name --delete: delete extraneous files from dest dirs (differential clean-up during sync) --progress: show progress during transfer ssh:: -T: turn off pseudo-tty to decrease cpu load on destination. -c arcfour: use the weakest but fastest SSH encryption. Must specify "Ciphers arcfour" in sshd_config on destination. -o Compression=no: Turn off SSH compression. -x: turn off X forwarding if it is on by default. Flip: rsync -aHAXxv --numeric-ids --delete --progress -e "ssh -T -c arcfour -o Compression=no -x" [source_dir] [dest_host:/dest_dir]

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" }

Watch active calls on an Asterisk PBX

Works on asterisk 1.8.

Generate a (compressed) pdf from images

use imagemagik convert

copy from host1 to host2, through your host

Good if only you have access to host1 and host2, but they have no access to your host (so ncat won't work) and they have no direct access to each other.

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Commands tagged Linux (265)

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