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Create a single-use TCP proxy with copy to stdout

USAGE: gate listening_port host port Creates listening socket and connects to remote device at host:port. It uses pipes for connection between two sockets. Traffic which goes through pipes is wrote to stdout. I use it for debug network scripts.
This is sample output - yours may be different.
1

gate() { mkfifo /tmp/sock1 /tmp/sock2 &> /dev/null && nc -p $1 -l < /tmp/sock1 | tee /tmp/sock2 & PID=$! && nc $2 $3 < /tmp/sock2 | tee /tmp/sock1; kill -KILL $PID; rm -f /tmp/sock1 /tmp/sock2 ; }

true · 2009-09-25 08:10:23 4
limit the cdrom driver to a specified speed

this command limit the speed to 8 until next eject of your cdrom disc , can be usefulll when you don't want to listen the sound of your cdrom driver .
This is sample output - yours may be different.
3

eject -x 8 /dev/cdrom

eastwind · 2009-09-25 08:02:30 3

bchunk [-v] [-p] [-r] [-w] [-s] Show Sample Output

bchunk IMAGE.bin IMAGE.cue IMAGE.iso

eastwind · 2009-09-25 07:42:05 4

Record microphone input and output to date stamped mp3 file

record audio notes or meetings requires arecord and lame run mp3gain on the resulting file to increase the volume / quality ctrl-c to stop recording Show Sample Output
This is sample output - yours may be different.
```
200909242323.mp3
```
11

arecord -q -f cd -r 44100 -c2 -t raw | lame -S -x -h -b 128 - `date +%Y%m%d%H%M`.mp3

oracular · 2009-09-25 05:32:52 8
Port scan a range of hosts with Netcat.

Simple one-liner for scanning a range of hosts, you can also scan a range of ports with Netcat by ex.: nc -v -n -z -w 1 192.168.0.1 21-443 Useful when Nmap is not available:) Range declaration like X..X "for i in {21..29}" is only works with bash 3.0+ Show Sample Output
This is sample output - yours may be different.
```
(UNKNOWN) [192.168.0.21] 443 (?) : Connection refused
(UNKNOWN) [192.168.0.22] 443 (?) open
(UNKNOWN) [192.168.0.23] 443 (?) : Connection refused
(UNKNOWN) [192.168.0.24] 443 (?) open
....
...
```
9

for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done

rez0r · 2009-09-25 03:31:29 12
get Hong Kong weather infomation from HK Observatory

"get Hong Kong weather infomation from HK Observatory From Hong Kong Observatory wap site ;)" other one showed alot of blank lines for me Show Sample Output
This is sample output - yours may be different.
```
HK Observatory
At 10 AM
29'C,75%
UV Index: 4
```
-1

wget -q -O - 'http://wap.weather.gov.hk/' | sed -r 's/<[^>]+>//g;/^UV/q' | tail -n4

dakunesu · 2009-09-25 02:36:46 3
get Hong Kong weather infomation from HK Observatory

From Hong Kong Observatory wap site ;) Show Sample Output
This is sample output - yours may be different.
```
HK Observatory
At 10 AM
29'C,75%
UV Index: 4
```
-1

wget -q -O - 'http://wap.weather.gov.hk/' | sed -r 's/<[^>]+>//g;/^UV/q' | grep -v '^$'

twfcc · 2009-09-25 02:21:05 6
Print all members of US House of Representatives

Uses curl to download page of membership of US Congress. Use sed to strip HTML then perl to print a line starting with two tabs (a line with a representative) Show Sample Output
This is sample output - yours may be different.
```
curl "http://www.house.gov/house/MemberWWW.shtml" 2>/dev/null | sed -e :a -e 
  's/<[^>]*>//g;/</N;//ba' | perl -nle 's/^\t\t(.*$)/ $1/ and 
  print;' > DefeatedIn2010.txt

#Fills a file called "DefeatedIn2010.txt" with the name of every member of congress.
```
-1

curl "http://www.house.gov/house/MemberWWW.shtml" 2>/dev/null | sed -e :a -e 's/<[^>]*>//g;/</N;//ba' | perl -nle 's/^\t\t(.*$)/ $1/ and print;'

drewk · 2009-09-24 23:37:36 15

Pretty Print a simple csv in the command line

Splits the input based on commas and prints it in a nice column format. This would not work for CSV rows that have "," between quotes or with newline characters. Use only simple simple csv files. Show Sample Output

This is sample output - yours may be different.

hatem@okra:~$ column -s, -t <~/projects/ummahrepos/2009_prayer_times.csv
date        week_day   fajr_azan  fajr_iqama  sunrise  dhuhr_azan  dhuhr_iqama  asr_azan  asr_iqama  maghrib_azan  maghrib_iqama  isha_azan  isha_iqama
2009-01-01  Thurusday  06:24      07:00       07:51    12:19       12:30        14:28     15:00      16:45         16:45          18:14      19:30     
2009-01-02  Friday     06:24      07:00       07:51    12:19       12:30        14:29     15:00      16:46         16:46          18:14      19:30     
2009-01-03  Saturday   06:24      07:00       07:51    12:20       12:30        14:29     15:00      16:47         16:47          18:15      19:30     
2009-01-04  Sunday     06:24      07:00       07:51    12:20       12:30        14:30     15:00      16:48         16:48          18:16      19:30     
2009-01-05  Monday     06:24      07:00       07:51    12:21       12:30        14:31     15:00      16:49         16:49          18:17      19:30     
2009-01-06  Tuesday    06:24      07:00       07:51    12:21       12:30        14:32     15:00      16:50         16:50          18:18      19:30     
2009-01-07  Wednesday  06:24      07:00       07:51    12:21       12:30        14:33     15:00      16:52         16:52          18:19      19:30     
2009-01-08  Thurusday  06:24      07:00       07:50    12:22       12:30        14:34     15:00      16:53         16:53          18:20      19:30     
2009-01-09  Friday     06:24      07:00       07:50    12:22       12:30        14:35     15:00      16:54         16:54          18:21      19:30     
2009-01-10  Saturday   06:23      07:00       07:50    12:23       12:30        14:36     15:00      16:55         16:55          18:22      19:30     
2009-01-11  Sunday     06:23      07:00       07:49    12:23       12:30        14:37     15:00      16:56         16:56          18:23      19:30     
2009-01-12  Monday     06:23      07:00       07:49    12:23       12:30        14:38     15:00      16:57         16:57          18:24      19:30     
2009-01-13  Tuesday    06:23      07:00       07:48    12:24       12:30        14:39     15:00      16:58         16:58          18:25      19:30     
2009-01-14  Wednesday  06:22      07:00       07:48    12:24       12:30        14:40     15:00      17:00         17:00          18:26      19:30     
2009-01-15  Thurusday  06:22      07:00       07:47    12:24       12:30        14:42     15:00      17:01         17:01          18:27      19:30     
2009-01-16  Friday     06:21      07:00       07:47    12:25       12:30        14:43     15:00      17:02         17:02          18:28      19:30     
2009-01-17  Saturday   06:21      07:00       07:46    12:25       12:30        14:44     15:00      17:03         17:03          18:29      19:30     
2009-01-18  Sunday     06:20      07:00       07:46    12:25       12:30        14:45     15:00      17:05         17:05          18:31      19:30     
2009-01-19  Monday     06:20      07:00       07:45    12:26       12:30        14:46     15:00      17:06         17:06          18:32      19:30     
2009-01-20  Tuesday    06:19      07:00       07:44    12:26       12:30        14:47     15:00      17:07         17:07          18:33      19:30     
2009-01-21  Wednesday  06:19      07:00       07:43    12:26       12:30        14:48     15:00      17:09         17:09          18:34      19:30     
2009-01-22  Thurusday  06:18      07:00       07:43    12:27       12:30        14:50     15:00      17:10

column -s, -t <tmp.csv

pykler · 2009-09-24 20:57:32 11

find . -name
This is sample output - yours may be different.
3

find . -name "*.txt" -exec sed -i "s/old/new/" {} \;

tyboon · 2009-09-24 20:30:00 15
futz.me - Send yourself notes from the command line

Allows you to send yourself notes from the commandline and receive them via email or text message. Also lets you send pics from the web, pics from your computer, and tweets directly to twitter. All without having to log in Ever. Show Sample Output
This is sample output - yours may be different.
```
You receive an email or SMS or Both with the message "Hey this is a test". Where "xxx" is your futz.me username of course. 
```
-1

lynx "futz.me/xxx hey this is a test"

commandlinekid · 2009-09-24 19:23:41 5
Remove blank lines from a file and save output to new file
This is sample output - yours may be different.
-4

sed '/^$/d' file >newfile

haplo · 2009-09-24 19:22:49 5
Randomize lines (opposite of | sort)

random(6) - random lines from a file or random numbers
This is sample output - yours may be different.
3

random -f <file>

haplo · 2009-09-24 19:15:58 10
ping a host until it responds, then play a sound, then exit

After this, just type: beepwhenup You need to install "beep" before this would make the beep sound. Save it in your .profile if you want to use it later WARNING: this command won't exit until it is successful. You won't be able to CONTROL+C out of it.
This is sample output - yours may be different.
2

beepwhenup () { echo 'Enter host you want to ping:'; read PHOST; if [[ "$PHOST" == "" ]]; then exit; fi; while true; do ping -c1 -W2 $PHOST 2>&1 >/dev/null; if [[ "$?" == "0" ]]; then for j in $(seq 1 4); do beep; done; ping -c1 $PHOST; break; fi; done; }

linuxrawkstar · 2009-09-24 18:11:10 7
Sum size of files returned from FIND
This is sample output - yours may be different.
3

find [path] [expression] -exec du -ab {} \; | awk '{total+=$0}END{print total}'

rehanift · 2009-09-24 17:50:26 3
Find duplicate dir in path
This is sample output - yours may be different.
0

echo $PATH|tr : '\n'|sort|uniq -d

haivu · 2009-09-24 17:22:45 3
Create a directory and change into it at the same time

How often do you make a directory (or series of directories) and then change into it to do whatever? 99% of the time that is what I do. This BASH function 'md' will make the directory path then immediately change to the new directory. By using the 'mkdir -p' switch, the intermediate directories are created as well if they do not exist. Show Sample Output
This is sample output - yours may be different.
```
abd-pb-2:bin md test
abd-pb-2:test md a/b/c/d/e
abd-pb-2:e 
```
32

md () { mkdir -p "$@" && cd "$@"; }

drewk · 2009-09-24 16:09:19 20
Get the total length of time in hours:minutes:seconds (HH:MM:SS) of all video (or audio) in the current dir (and below)

change the *.avi to whatever you want to match, you can remove it altogether if you want to check all files.
This is sample output - yours may be different.
10

find -type f -name "*.avi" -print0 | xargs -0 mplayer -vo dummy -ao dummy -identify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

grokskookum · 2009-09-24 15:50:39 33
Randomize lines (opposite of | sort)

The sort utility is well used, but sometimes you want a little chaos. This will randomize the lines of a text file. BTW, on OS X there is no | sort -R option! There is also no | shuf These are only in the newer GNU core... This is also faster than the alternate of: | awk 'BEGIN { srand() } { print rand() "\t" $0 }' | sort -n | cut -f2- Show Sample Output
This is sample output - yours may be different.
```
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach $line (@f){ print $line; }}'

... randome lines from SortedFile.txt
```
0

cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); } chomp @f; foreach $line (@f){ print $line; }}'

drewk · 2009-09-24 15:42:43 5
find . -name "*.txt" | xargs sed -i "s/old/new/"
This is sample output - yours may be different.
0

find . -name "*.txt" | xargs sed -i "s/old/new/"

noblejasper · 2009-09-24 15:02:31 3
svn diff $* | colordiff | lv -c
This is sample output - yours may be different.
0

svn diff $* | colordiff | lv -c

noblejasper · 2009-09-24 14:55:25 5

record the input of your sound card into ogg file

save the input into a ogg file Show Sample Output

rec -c 2 -r 44100 -s -t wav - | oggenc -q 5 --raw --raw-chan=2 --raw-rate=44100 --raw-bits=16 - > MyLiveRecording.ogg

eastwind · 2009-09-24 14:46:12 3

backup your playstation game using rip

Show Sample Output

$ cdrdao read-cd --read-raw --datafile FILE_NAME.bin --device /dev/cdrom --driver generic-mmc-raw FILE_NAME.toc

eastwind · 2009-09-24 14:19:22 67

Test a serial connection

If the connection works you should see a "hello" on host A. If not: check your cabeling etc :-)
This is sample output - yours may be different.
2

host A: cat /proc/dev/ttyS0 host B: echo hello > /dev/ttyS0

flart · 2009-09-24 13:22:23 6
Remove blank lines from a file using grep and save output to new file

The ^$ within the quotes is a regular expression: ^=beginning of line, $=end of line, with no characters between.
This is sample output - yours may be different.
1

grep -v "^$" filename > newfilename

eastwind · 2009-09-24 12:21:43 4
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Generate random valid mac addresses

Shorter and more straightforward. Also in perl: $ perl -e 'print join(":", map { sprintf "%0.2X",rand(256) }(1..6))."\n"'

Remove empty directories

It only works in zsh

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" }

List installed deb packages by size

revert a committed change in SVN

This command can be used to revert a particular changeset in the local copy. I find this useful because I frequently import files into the wrong directory. After the import it says "Committed revision 123" or similar. to revert this change in the working copy do: svn merge -c -123 . (don't forget the .) and then commit.

Check RAM size

Random quote from Borat

I improved a bit on the original by only using sed and extracting the quote with a matching group. Use -nE for sed on Mac OSX Use -nr for sed on Linux. Warning! The quotes from Borat are definitely offensive.

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"

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

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"

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