Commands by kev

Commands by kev (116)

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Display helpful information about builtin commands.

don't `man bash` Show Sample Output
This is sample output - yours may be different.
```
builtin: builtin [shell-builtin [arg ...]]
     Run a shell builtin.  This is useful when you wish to rename a
    shell builtin to be a function, but need the functionality of the
    builtin within the function itself.
```
-4

help builtin

kev · 2011-12-25 04:52:49 6
vim read stdin
This is sample output - yours may be different.
5

ls | vim +'set bt=nowrite' -

kev · 2011-12-24 07:33:49 6
get current tty name

http://www.thegeekstuff.com/2009/03/4-ways-to-identify-who-is-logged-in-on-your-linux-system/
This is sample output - yours may be different.
-8

who am i

kev · 2011-12-23 03:30:47 8
extract element of xml
This is sample output - yours may be different.
9

xmlstarlet sel -t -c "/path/to/element" file.xml

kev · 2011-12-19 06:20:46 4
don't auto run gdm

run `sudo update-rc.d gdm defaults` to get it back
This is sample output - yours may be different.
-2

sudo update-rc.d -f gdm remove

kev · 2011-12-16 10:12:21 3
list with full path
This is sample output - yours may be different.
0

find `pwd` -maxdepth 1 -exec ls --color -d {} \;

kev · 2011-12-16 06:18:35 5
copy `file.txt` to remote server
This is sample output - yours may be different.
-6

scp -l username -pw pa33w0rd file.txt 192.168.1.2:/path/to/dir

kev · 2011-12-16 02:48:38 4
cvs diff HEAD and current branch

you can't reliably use diff against -r HEAD to test whether a file matches the head of the trunk.
This is sample output - yours may be different.
0

cvs up -pA main.cpp | sdiff -s - main.cpp

kev · 2011-12-14 04:51:40 4
google chart api

http://chart.apis.google.com/chart?chs=450x200&cht=p3&chtt=Browser+Usage+on+Wikimedia&chl=IE%2834.2%%29|Firefox%2823.6%%29|Chrome%2820.6%%29|Safari%2811.2%%29|Opera%285.0%%29|Android%281.9%%29|Other%283.5%%29&chd=t:34.2,23.6,20.6,11.2,5.0,1.9,3.5
This is sample output - yours may be different.
1

wget -O chart.png 'http://chart.googleapis.com/chart?chs=250x100&chd=t:60,40&cht=p3&chl=Hello|World'

kev · 2011-12-10 18:03:16 59
remove *.jpg smaller than 500x500
This is sample output - yours may be different.
2

identify -format '%w %h %f\n' *.jpg | awk 'NF==3&&$1<500&&$2<500{print $3}' | xargs -r rm

kev · 2011-12-03 03:34:16 3

generate random ascii shape(no x11 needed!)

echo 'set term dumb; unset border; unset xtics; unset ytics; p "< seq 10 | shuf" u 1:(rand(0)) w l notitle' | gnuplot

kev · 2011-11-30 02:08:53 4

generate random identicon
This is sample output - yours may be different.
7

curl -s "http://www.gravatar.com/avatar/`uuidgen | md5sum | awk '{print $1}'`?s=64&d=identicon&r=PG" | display

kev · 2011-11-29 16:41:04 32
histogram of file size
This is sample output - yours may be different.
2

gnuplot -p <(echo "set style data hist; set xtic rot by -45; plot '<(stat -c \"%n %s\" *)' u 2:xtic(1)")

kev · 2011-11-29 13:23:36 5
google tts
This is sample output - yours may be different.
2

say() { curl -sA Mozilla -d q=`python3 -c 'from urllib.parse import quote_plus; from sys import stdin; print(quote_plus(stdin.read()[:100]))' <<<"$@"` 'http://translate.google.com/translate_tts' | mpg123 -q -; }

kev · 2011-11-26 09:18:16 20
encrypt sensitive image using password

Do not use JPEG, GIF, or any other 'lossy' image encoding with Encryption
This is sample output - yours may be different.
0

read -s PASS; echo $PASS | convert sensitive.jpg -encipher - -depth 8 png24:hidden.png

kev · 2011-11-25 18:15:23 11
create thumbnail of pdf
This is sample output - yours may be different.
4

convert -resize 200 awk.pdf[0] awk.png

kev · 2011-11-23 03:50:15 3
capture selected window
This is sample output - yours may be different.
4

import -window `xwininfo | awk '/Window id/{print $4; exit}'` `uuidgen`.png

kev · 2011-11-23 03:48:40 7
save man-page as pdf
This is sample output - yours may be different.
17

man -t awk | ps2pdf - awk.pdf

kev · 2011-11-23 01:40:23 8
Prints "hello, world" to the console in very large letters

# # ####### # # ####### # # ####### ###### # ###### # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ####### ##### # # # # ### # # # # # ###### # # # # # # # # # # ### # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ####### ####### ####### ####### # ## ## ####### # # ####### ###### Show Sample Output
This is sample output - yours may be different.
```
#     #  #######  #        #        #######                     #     #  #######  ######   #        ######
#     #  #        #        #        #     #                     #  #  #  #     #  #     #  #        #     #
#     #  #        #        #        #     #                     #  #  #  #     #  #     #  #        #     #
#######  #####    #        #        #     #   ###               #  #  #  #     #  ######   #        #     #
#     #  #        #        #        #     #   ###               #  #  #  #     #  #   #    #        #     #
#     #  #        #        #        #     #    #                #  #  #  #     #  #    #   #        #     #
#     #  #######  #######  #######  #######   #                  ## ##   #######  #     #  #######  ######
```
-4

paste <(banner hello,\ ) <(banner world)

kev · 2011-11-21 06:38:16 5
ascii digital clock

# ### ### # # ### ### # # # ## # # ### # # # # ### ## # # # # # # ### # # # # ### # # # # # ### ##### # # ##### # # # ### # # ### # # # # # ### # # ### # # ##### ### ### # ##### ### ##### # Show Sample Output
This is sample output - yours may be different.
```
  #     ###    ###   #   #   ###    ###     #    #   #
 ##    #   #   ###   #   #  #   #   ###    ##    #   #
# #    #   #   ###   #   #  #   #   ###   # #    #   #
  #     ###          #####     #            #    #####
  #    #   #   ###       #    #     ###     #        #
  #    #   #   ###       #   #      ###     #        #
#####   ###    ###       #  #####   ###   #####      #
```
5

watch -tn1 'date +%T | xargs banner'

kev · 2011-11-20 04:46:02 9
Start COMMAND, and kill it if still running after 5 seconds
This is sample output - yours may be different.
43

timeout 5s COMMAND

kev · 2011-11-19 06:14:33 12
remap Caps_Lock to Escape
This is sample output - yours may be different.
7

xmodmap -e 'clear Lock' -e 'keycode 0x42 = Escape'

kev · 2011-11-17 08:51:35 5
generate random string
This is sample output - yours may be different.
0

python -c 'import string, random; print "".join(random.choice(string.letters+string.digits) for x in range(6))'

kev · 2011-11-16 17:22:39 22
generate /etc/shadow-style password

Show Sample Output
This is sample output - yours may be different.
```
$1$saltsalt$J9FHdD60EASotLk.KSSI4/
```
-2

mkpasswd -5 pa33w0rd saltsalt

kev · 2011-11-16 16:24:18 9
subtraction between lines
This is sample output - yours may be different.
1

seq 1 3 20 | sed -n '1{h;d};H;x;s/\n/\t/p' | awk '{printf("%d - %d = %d\n", $2, $1, $2-$1)}'

kev · 2011-11-10 10:38:11 6
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See entire packet payload using tcpdump.

Open a man page as a PDF in Gnome

Would be better if gnome-open would accept std in Should be doable in KDE - anyone?

Grab IP address on machine with multiple interfaces

Instead of hard-coding in a check to scrape info from ifconfig based on a specific interface, do it in a more portable way. This works really well if you switch between wired, wireless, bluetooth or even VPN connections. You can get your current IP in a script (since it'll be something like tun0 instead of eth0 or wlan1). This uses a well known public ip address 8.8.8.8, but it doesn't actually connect to it, it just shows you the route it would take.

Use vi commands to edit your command lines

If you spend all day editing in vi then switching your fingers to Emacs mode just for the command line can be difficult. Use set -o vi in your bash shell and enjoy the power of a real editor.

ping MAC ADDRESS

# first install arp-scan if not have it arp-scan 10.1.1.0/24 .... show ip+mac in localnet awk '/00:1b:11:dc:a9:65/ {print $1}' .... get ip associated with MAC ` backtick make do command substitution passing ip to command ping

Oneliner to run commands on multiple servers

Oneliner to run commands on multiple servers over ssh. - First parameter "$1" is the command you want to execute remotely. ( It can be multiple commands e.g. "hostname;uptime") - Second parameter "${@:2}" represents the remote host/s you want to run the command/s on.

Disable the ping response

It really disables all ICMP responses not only the ping one. If you want to enable it you can use: $ sudo -s "echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all"

Show apps that use internet connection at the moment. (Multi-Language)

Remove security limitations from PDF documents using ghostscript (for Windows)

#4345 also works under windows

send tweets to twitter (and get user details)

great for outputting tweets from cron jobs and batch scripts

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Commands by kev (116)

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