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This is sample output - yours may be different.

gnu@robby:~$ mencoder -idx out2.ogv -ovc lavc -oac mp3lame -audiofile /home/gnu/snowballz/data/music/snowballz2.mp3  -o snow.avi
MEncoder 2:1.0~rc2-0ubuntu19 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Pentium(R) D CPU 2.80GHz (Family: 15, Model: 4, Stepping: 7)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
success: format: 0  data: 0x0 - 0x76c7ec5
Ogg stream 0 is of an unknown type
[Ogg] stream 1: video (Theora v3.2.1), -vid 0
Ogg file format detected.
VIDEO:  [theo]  1024x768  24bpp  15.000 fps    0.0 kbps ( 0.0 kbyte/s)
Audio file file format detected.
[V] filefmt:65536  fourcc:0x6F656874  size:1024x768  fps:15.00  ftime:=0.0667
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 44100 Hz, 2 ch, s16le, 192.0 kbit/13.61% (ratio: 24000->176400)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
[theora @ 0x88423b0]Missing extradata!
Could not open codec.
VDecoder init failed :(
Opening video decoder: [theora] Theora/VP3
VDec: vo config request - 1024 x 768 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
videocodec: libavcodec (1024x768 fourcc=34504d46 [FMP4])
Selected video codec: [theora] vfm: theora (Theora (free, reworked VP3))
==========================================================================
MP3 audio selected.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Pos: 169.7s   2546f ( 0%) 12.61fps Trem:   0min   0mb  A-V:0.139 [815:231]
Skipping frame!
Pos: 170.4s   2557f ( 0%) 12.62fps Trem:   0min   0mb  A-V:0.135 [816:230]
Skipping frame!
Pos: 331.8s   4979f ( 0%) 13.60fps Trem: 603min 3609mb  A-V:0.102 [791:230]
Flushing video frames.
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.

Video stream:  791.586 kbit/s  (98948 B/s)  size: 32831029 bytes  331.800 secs  4979 frames

Audio stream:  230.839 kbit/s  (28854 B/s)  size: 4917529 bytes  170.423 secs

mencoder -idx Your_Input_Video_File -ovc lavc -oac mp3lame -audiofile Your_Audio_track.mp3 -o Output_File.avi

eastwind · 2009-12-11 23:50:37 3

Duplicate several drives concurrently

If you have some drive imaging to do, you can boot into any liveCD and use a commodity machine. The drives will be written in parallel. To improve efficiency, specify a larger block size in dd: dd if=/dev/sda bs=64k | tee >(dd of=/dev/sdb bs=64k) | dd of=/dev/sdc bs=64k To image more drives , insert them as additional arguments to tee: dd if=/dev/sda | tee >(dd of=/dev/sdb) >(dd of=/dev/sdc) >(dd of=/dev/sdd) | dd of=/dev/sde
This is sample output - yours may be different.
23

dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

nerd65536 · 2009-12-11 17:34:38 12
validate xml in a shell script.

For debian likes, that's in python-xml package.
This is sample output - yours may be different.
-1

xmlproc_parse.python-xml &>/dev/null <FILE> || exit 1

sputnick · 2009-12-11 17:30:03 5
validate xml in a shell script using xmllint
This is sample output - yours may be different.
1

xmllint --noout some.xml 2>&1 >/dev/null || exit 1

putnamhill · 2009-12-11 16:36:21 6
Print line numbers

Print out contents of file with line numbers. This version will print a number for every line, and separates the numbering from the line with a tab. Show Sample Output
This is sample output - yours may be different.
```
1     This is line 1.
2     This is line 2.
3
4     This is line 4.
```
-1

sed = <file> | sed 'N;s/\n/\t/'

jgc · 2009-12-11 14:39:14 3
List the size (in human readable form) of all sub folders from the current location

Parsing the output of ls is never a good idea for any reason. Using find this way: - works with files that have spaces in their names. - actually lists "sub folders" and not of all files and folders. - does not break if there are a huge number of files in the current directory.
This is sample output - yours may be different.
-6

find . -maxdepth 1 -type d -not -name . -exec du -sh {} +

sorpigal · 2009-12-11 14:37:26 4
Change your swappiness Ratio under linux

This command allow you to set the swappiness var at 50 (default is 60). The value interval must be set between 0 and 100. If swappiness is high=Swap usage is high, if swappiness is low=Ram usage is high.
This is sample output - yours may be different.
8

sysctl vm.swappiness=50

marousan · 2009-12-11 10:40:21 7
Find the ratio between ram usage and swap usage.

it provides the ratio used for the RAM and The SWAP under Linux. When swappiness is high, Swap usage is high. When swappiness is low, Ram usage is high. Show Sample Output
This is sample output - yours may be different.
```
vm.swappiness = 60
```
3

sysctl -a | grep vm.swappiness

marousan · 2009-12-11 10:33:35 4
List all TCP opened ports on localhost in LISTEN mode

Alternative of OJM snippet : This one show the IP too, where ports bind. It's very important, because if there's only 127.0.0.1 instead of 0.0.0.0, connections from internet are rejected.
This is sample output - yours may be different.
3

netstat -nptl

sputnick · 2009-12-11 10:23:43 4
Analyse compressed Apache access logs for the most commonly requested pages
This is sample output - yours may be different.
4

zcat access_log.*.gz | awk '{print $7}' | sort | uniq -c | sort -n | tail -n 20

tkb · 2009-12-11 09:36:30 4
list all opened ports on host
This is sample output - yours may be different.
3

sudo lsof -P -i -n -sTCP:LISTEN

OJM · 2009-12-11 07:16:54 3
Send a local file via email

Another way of sending an attachment. -s : subject file : file to be sent
This is sample output - yours may be different.
4

mpack -s "Backup: $file" "$file" email@id.com

sentinel · 2009-12-11 04:03:06 3
See non printable caracters like tabulations, CRLF, LF line terminators ( colored )

For fancier and cleaner output, try the following snippet : showendlines(){ while read i; do od --address-radix=n --width=$(wc -c <<< "$i") -c <<< "$i" | perl -pe 's/.\K\s{2,3}//g'; done < $1 | grep --color '\\.'; } Now you can run that with : showendlines <FILE> Thanks to prince_jammys to "debug" my English ;)
This is sample output - yours may be different.
7

od -c <FILE> | grep --color '\\.'

sputnick · 2009-12-11 02:15:48 9
Send a local file via email

Send it the easy way, with MIME and everything handled for you by an app that knows best.
This is sample output - yours may be different.
4

mutt your@email_address.com -s "Message Subject Here" -a attachment.jpg </dev/null

linuxrawkstar · 2009-12-10 22:49:38 5
list all opened ports on host
This is sample output - yours may be different.
4

nmap -p 1-65535 --open localhost

solarislackware · 2009-12-10 20:03:37 3
Send a local file via email

on this way we can define the body too
This is sample output - yours may be different.
0

{ echo -e "$body"; uuencode "$outfile" "$outfile"; } | mail -s "$subject" "$destaddr" ;

glaudiston · 2009-12-10 18:08:59 4
prints line numbers

There's too many options to number, My curiosity has forced me to make it using only sed. Maybe useful... or not... :-S
This is sample output - yours may be different.
-1

sed '/./=' infile | sed '/^/N; s/\n/ /'

glaudiston · 2009-12-10 16:24:56 6
List the size (in human readable form) of all sub folders from the current location
This is sample output - yours may be different.
7

du -sh */

guxtavo · 2009-12-10 16:19:15 6
List the size (in human readable form) of all sub folders from the current location
This is sample output - yours may be different.
-4

ls | xargs du -sh

jyro · 2009-12-10 15:58:05 3
extract plain text from MS Word docx files

Tested on MacOS X
This is sample output - yours may be different.
5

unzip -p some.docx word/document.xml | sed -e 's/<[^>]\{1,\}>//g; s/[^[:print:]]\{1,\}//g'

putnamhill · 2009-12-10 15:13:33 12
Find jpeg images and copy them to a central location

Use if you have pictures all over the place and you want to copy them to a central location Synopsis: Find jpg files translate all file names to lowercase backup existing, don't overwrite, preserve mode ownership and timestamps copy to a central location
This is sample output - yours may be different.
4

find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=numbered -dp -u --target-directory {location} &

oracular · 2009-12-10 08:47:04 5
show your locale language keyboard setting

Show Sample Output
This is sample output - yours may be different.
```
gnu@robby:~$ locale | grep LANG=
LANG=fr_BE.UTF-8
```
-1

locale | grep LANG=

eastwind · 2009-12-10 07:24:01 5
Format a flooppy with windows compatible disk

The 1440 is the number of bytes, and the A: specifies the floppy drive.
This is sample output - yours may be different.
-1

mformat -f 1440 A:

eastwind · 2009-12-10 06:51:20 3
mount a msdos formated floppy disk

-t option tells the system to look for a msdos filesystem The /dev/fd0 is your floppy drive ( This may be different for you check /dev folder to confirm) /mnt/floppy is the point where you want to mount the device to
This is sample output - yours may be different.
-2

mount -t msdos /dev/fd0 /mnt/floppy

eastwind · 2009-12-10 06:46:53 7
convert wmv into xvid avi format
This is sample output - yours may be different.
1

mencoder -ovc xvid -oac mp3lame -srate 44100 -af lavcresample=44100 -xvidencopts fixed_quant=4 Foo.wmv -o Bar.avi

eastwind · 2009-12-10 06:46:11 3
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Randomize lines (opposite of | sort)

random(6) - random lines from a file or random numbers

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Fix borked character coding in a tty.

Often you find some tty programs are messed up and confused about character encoding - 'man' is a common problem and sometimes displays weird characters for apostrophes, hyphens etc etc. Another class of programs that suffer from this are those that try to use the line drawing characters - eg RedHat's tty system admin functions such as system-config-firewall-tui system-config-network-tui etc. Adding 'LC_ALL=C' fixes most of these problems (as long as you want English! Perhaps speakers of other languages can add a comment here). For bonus points, I've added the '-c' option to the man command so that it ignores it's cache and re-computes the man page using the C locale.

show git logging

shows some logging for the git repo.

A command to post a message and an auto-shortened link to Twitter. The link shortening service is provide by TinyURL.

A command to post a message and an auto-shortened link to Twitter. The link shortening service is provided by TinyURL.

List files above a given threshold

List files above a given size threshold.

Hide or show Desktop Icons on MacOS

Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work

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" }

Jump to a directory, execute a command and jump back to current dir

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

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