Commands by gwd

Commands by gwd (5)

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list any Linux files without users or groups

suspicious/anomalous ownership may indicate system breach; should return no results
This is sample output - yours may be different.
1

sudo find / $ -nouser -o -nogroup $

gwd · 2012-07-13 07:09:08 0
list all world-writeable Linux files
This is sample output - yours may be different.
0

sudo find / -perm -2 ! -type l -ls

gwd · 2012-07-13 07:01:42 0
change default Web browser

also use: update-alternatives --config gnome-www-browser
This is sample output - yours may be different.
0

update-alternatives --config x-www-browser

gwd · 2012-07-08 20:27:42 1
disable Internet services (i.e., those using inetd) without uninstalling

Disable service, then if still listening restart inetd to unbind it. Use update-rc.d for disabling other types of services.
This is sample output - yours may be different.
0

update-inetd --disable foobar && /etc/init.d/inetutils-inetd restart

gwd · 2012-06-10 08:06:52 0
disable services without uninstalling them

Service (except if using inetd) flagged for disabling with 'remove', then stopped if running.
This is sample output - yours may be different.
0

update-rc.d -f foobar remove && update-rc.d foobar stop

gwd · 2012-06-10 07:39:28 0

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commandline dictionary

Note: 1) Replace 'wonder' with any word you looking the meaning for in the above example 2) Need to install these packages: wordnet & wordnet-base (latter should be automatically installed because of dependency) 3) Combined size of packages is about 30MB on my old ubuntu system (I find it worth it)

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"

Quick syntax highlighting with multiple output formats

You can specify various output formats, theme styles, etc. $ python -m pygments -o source.png source.py $ python -m pygments -o source.rtf source.py Check available output formats, styles, etc.: $ python -m pygments -L Find pygments module here: http://pygments.org/

Show recent earthquakes in Bay Area

To see only earthquakes for today, add another pipe to egrep "`date '+%Y/%m/%d'`"

Propagate a directory to another and create symlink to content

Lndir create from source directory to destination directory a full symlink tree of all contents of source directory, really useful for propagate changes from a directory to another.

Find the package that installed a command

Slow down the screen output of a command

(example above is the 'ls' command with reduced output speed)

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Getting the ip address of eth0

Add existing user to a group

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Commands by gwd (5)

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