Commands by kev

Commands by kev (116)

sorted by

where am I in google map?
This is sample output - yours may be different.
-2

curl -s http://geoiplookup.wikimedia.org/ | python3 -c 'import sys, json, string, webbrowser; webbrowser.open(string.Template("http://maps.google.com/maps?q=$lat,$lon").substitute(json.loads(sys.stdin.read().split("=")[-1])))'

kev · 2011-11-10 01:25:30 3
batch download jpgs which are in sequence
This is sample output - yours may be different.
0

curl -O http://www.site.com/img/image[001-175].jpg

kev · 2011-11-09 10:19:24 4
recursively walk down no more than three levels and grab any file with an extension of mp3, mpg, mpeg, or avi
This is sample output - yours may be different.
1

wget -A mp3,mpg,mpeg,avi -r -l 3 http://www.site.com/

kev · 2011-11-09 10:06:07 3
send cookie
This is sample output - yours may be different.
0

curl -b cookie.txt http://www.site.com/download/file.txt

kev · 2011-11-09 03:00:49 4
save login cookie
This is sample output - yours may be different.
0

curl -c cookie.txt -d username=hello -d password=w0r1d http://www.site.com/login

kev · 2011-11-09 02:57:39 3
Using json.tool from the shell to validate and pretty-print
This is sample output - yours may be different.
4

echo '{"json":"obj"}' | python -mjson.tool

kev · 2011-11-08 10:44:29 10
fomat/encode/escape xml
This is sample output - yours may be different.
0

xml fo -e utf-8 file.xml | xml esc

kev · 2011-11-08 07:51:40 3
clear all non-ascii chars of file.txt
This is sample output - yours may be different.
2

iconv -c -f utf-8 -t ascii file.txt

kev · 2011-11-05 08:27:03 4
build cscope.out from all *.{h,cpp}, but ignore hidden files

cd / find `pwd` -name '.*' -prune -o $ -name *.h -o -name *.cpp $ -print | cscope -bi- export CSCOPE_DB=/cscope.out vim +'set cst'
This is sample output - yours may be different.
-2

find `pwd` -name '.*' -prune -o $ -name *.h -o -name *.cpp $ -print | cscope -bi-

kev · 2011-11-02 08:43:40 6
convert UNIX timestamp to UTC timestamp

date -ud @1320198157
This is sample output - yours may be different.
6

TZ=UTC date -d @1320198157

kev · 2011-11-02 01:48:49 4
move you up one directory quickly
This is sample output - yours may be different.
-21

alias ..='cd ..'

kev · 2011-10-28 10:12:57 11
pick up 3 lines start at every 5th line of file.txt

sed '4~5,+1d' file.txt 1 2 3 6 7 8 Show Sample Output
This is sample output - yours may be different.
```
sed '4~5,+1d' file.txt
1
2
3
6
7
8
```
0

sed -n '1~5{N;N;p}' file.txt

kev · 2011-10-26 16:15:34 3
append empty line after every line in file.txt
This is sample output - yours may be different.
3

sed G file.txt

kev · 2011-10-26 15:14:24 5
wc in perl
This is sample output - yours may be different.
1

perl -ane 'END{printf(" %d %d %d\n", $x, $y, $z)} $x+=1; $y+=@F; $z+=length' file.txt

kev · 2011-10-24 06:14:02 10
print multiplication formulas

seq -s ' ' 1 9 | sed -n ':a;p;s/ *\w$//;h;/^$/t;b a;q' | tac | awk '{for(i=1;i 1x1=1 1x2=2 2x2=4 1x3=3 2x3=6 3x3=9 1x4=4 2x4=8 3x4=12 4x4=16 1x5=5 2x5=10 3x5=15 4x5=20 5x5=25 1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36 1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49 1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64 1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81
This is sample output - yours may be different.
11

seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}'

kev · 2011-10-22 18:41:09 31
make comments invisible when editing a file

you should choose proper color to make comments invisible.
This is sample output - yours may be different.
-1

vim -c'highlight Comment ctermfg=white' my.conf

kev · 2011-10-21 00:53:03 67
return a titlecased version of the string[str.title() in python]
This is sample output - yours may be different.
1

title() { sed 's/\<\w*/\u&/g' <<<$@; }

kev · 2011-10-11 01:23:12 3
using `!#$' to referance backward-word

expand to: cp /work/host/phone/ui/main.cpp /work/target/phone/ui/main.cpp !# The entire command line typed so far.
This is sample output - yours may be different.
33

cp /work/host/phone/ui/main.cpp !#$:s/host/target

kev · 2011-09-20 06:48:07 15
capture screen and mic

sxga ==> 1280x1024 vga ==> 800x600 ------------------------------------------------ xwininfo -root | grep geometry ------------------------------------------------
This is sample output - yours may be different.
0

ffmpeg -f alsa -i default -f x11grab -s sxga -r 10 -i :0.0 -f mp4 -s vga -sameq out.mp4

kev · 2011-09-18 15:10:56 3
sendmail via commandline
This is sample output - yours may be different.
-3

cat file.txt | sendmail -F myname -f admin@mysite.com guest@guest.com

kev · 2011-09-18 11:35:35 47
decrypt file.txt.gpg using my private key
This is sample output - yours may be different.
-4

gpg -d file.txt.gpg -o file.txt

kev · 2011-09-17 05:04:59 6
verify a file using its detached signature
This is sample output - yours may be different.
-4

gpg --verify file.txt.asc file.txt

kev · 2011-09-17 04:58:56 3
encrypt file.txt using a symmetric password
This is sample output - yours may be different.
0

gpg -c file.txt

kev · 2011-09-17 04:53:03 3
encrypt file.txt using myfriend's pubkey && add your signature

-s Make a signature. -e Encrypt data. -r Encrypt for user id name.
This is sample output - yours may be different.
-3

gpg -ser 'myfriend@gmail.com' file.txt

kev · 2011-09-17 04:51:02 3
create a detached signature for file.txt
This is sample output - yours may be different.
-3

gpg -ab file.txt

kev · 2011-09-17 04:42:55 3
< 1 2 3 4 5 >

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

List dot-files and dirs, but not . or ..

Oneliner to get domain names list of all existing domain names (from wikipedia)

Quietly get a webpage from wikipedia: curl -s By default, don't output anything: sed -n Search for interesting lines: /<tr valign="top">/ With the matching lines: {} Search and replace any html tags: s/<[^>]*>//g Finally print the result: p

Printout a list of field numbers (awk index) from a CSV file with headers as first line.

Useful to identify the field number in big CSV files with large number of fields. The index is the reference to use in processing with commands like 'cut' or 'awk' involved.

extracts 64 bytes of random digits from random lines out of /dev/random sent to stdio

Use this the next time you need to come up with a reasonably random bitstring, like for a WPA/WPA2 PSK or something. Takes a continuous stream of bytes coming from /dev/urandom, runs it through od(1), picking a random field ($0 and $1 excluded) from a random line and then prints it.

Capture video of a linux desktop

Fetch the Gateway Ip Address

This is to fetch the Gateway Ip Address of a machine. Use the below format to put the value in a variable if you wish to find the gateway ip in a script $GATEWAY=$(netstat -nr | awk 'BEGIN {while ($3!="0.0.0.0") getline; print $2}')

Remote Serial connection redirected over network using SSH

Requires software found at: http://lpccomp.bc.ca/remserial/ Remote [A] (with physical serial port connected to device) $./remserial -d -p 23000 -s "115200 raw" /dev/ttyS0 & Local [B] (running the program that needs to connect to serial device) Create a SSH tunnel to the remote server: $ssh -N -L 23000:localhost:23000 user@hostwithphysicalserialport Use the locally tunnelled port to connect the local virtual serial port to the remote real physical port: $./remserial -d -r localhost -p 23000 -l /dev/remser1 /dev/ptmx & Example: Running minicom on machine B using serial /dev/remser1 will actually connect you to whatever device is plugged into machine A's serial port /dev/ttyS0.

FLV to AVI with subtitles and forcing audio sync using mencoder

Gives MPEG-4/DivX output video file ready for uploading to YouTube from FLV file downloaded from the site and your own subtitle file UTF-8 encoded. No resizing needed. (?)

Monitor all DNS queries seen by the local machine

notify yourself when a long-running command which has ALREADY STARTED is finished

If you want to be notified when a long-running command is finished, but you have already started it: CTRL+Z $ fg; echo "finished" | sendmail me@example.com I use a script to post a tweet, which sends me a txt: $ fg; echo "finished" | tweet

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by kev

Commands by kev (116) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands by kev (116)

sorted by