Create compressed, encrypted backup from $source to $targetfile with password $key and exclude-file $excludefile

1. Copy the url of the streaming video mms://etc... or http://...

2. Open up a terminal.

3. the command

4. Wait for the stream dump.

Creates a temporary ram partition

To use:

ram 3

to make a 3gb partition (Defaults to 1gb)

This is just another example of what the nocache package is useful for, which I described in http://www.commandlinefu.com/commands/view/12357/ and that provides the commands

Often, we do not want to disable caching, because several file reads are involved in a command and operations would be slowed down a lot, due to massive disk seeks. But after our operations, the file sits in the cache needlessly, if we know we're very likely never touching it again.

cachedel helps to reduce cache pollution, i.e. frequently required files relevant for desktop interaction (libs/configs/etc.) would be removed from RAM.

So we can run cachedel after each data intensive job. Today I run commands like these:

https://github.com/Feh/nocache

http://packages.debian.org/search?keywords=nocache

http://packages.ubuntu.com/search?keywords=nocache

http://askubuntu.com/questions/122857

Much more useful then parsing syslog

This command drops all the sequences of the 'public' schema from the database.

First, it constructs a 'drop sequence' instruction for each table found in the schema, then it pipes the result to the psql interactive command.

See it scripted here : https://gist.github.com/cuberri/6868774#file-postgresql-drop-create-sh

This command drops all the tables of the 'public' schema from the database.

First, it constructs a 'drop table' instruction for each table found in the schema, then it pipes the result to the psql interactive command.

Useful when you have to recreate your schema from scratch in development for example.

I mainly use this command in conjunction with a similar command which drop all sequences as well.

Example :

See it scripted here : https://gist.github.com/cuberri/6868774#file-postgresql-drop-create-sh

Useful when you want to cron a daily deletion task in order to keep files not older than one year. The command excludes .snapshot directory to prevent backup deletion.

One can append -delete to this command to delete the files :

alias lst="ls -ls -tr | tail"

You can get the mean value for the colours in an image. Then you can determine, in general, how dark or bright is the image and run some other actions based on that. I'll recommend to readjust the brightness of the images using +sigmoidal-contrast option of imagemagick convert command.

-c will count the number of times your search matches in the file.

If a session with named the same as your username already exists, then attach to it, otherwise create it

when bad day comes...

Syntax:

$ prepend content to add [filename]

Uses ed, so no temp files created.

For example we need find fast where located and described keyword COMMIT_EDITMSG in man files. Here example howto solve it by search with command bzgrep in man files. Generally these files in bz compressed format. You can use another keywords to your search. Common syntax is:

bzgrep -lE keyword1 /usr/share/man/man?/optional-keyword-to-refine*

or

bzgrep -lE keyword1 /usr/share/man/man?/*

where optional-keyword-to-refine is optional and may be omitted but used to speedup search

Of course you may combine other options for bzgrep (its based on grep)

The equivalent of opening each file in vim and doing

gg=G:wq . Bufdo makes it faster by obviating the need to start vim for each file separately.