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How to Log terminal commands and outputs in Ubuntu

admin — Thu, 10 Dec 2009 12:59:07 +0000

Use the two command:

cat /dev/vcs1 >screenshot
script screen.log

this will start record what you input and what it outputs in the first opened terminal window.
If you have opened several terminal windows you can change the number 1 to 2 or 3 which means the second terminal window or the third terminal window.

When you type:

exit

this stops record,and you can see the file “screen.log” for what you did.

Multiple Ubuntu Terminals in one window using Terminator

admin — Mon, 30 Nov 2009 01:40:26 +0000

Terminator is a little program in ubuntu gnome that the user can have multiple terminals in one window and use key bindings to switch between them.

The goal of this project is to produce a useful tool for arranging terminals.
It is inspired by programs such as gnome-multi-term, quadkonsole, etc. in that the main focus is arranging terminals in grids (tabs is the most common default method, which Terminator also supports).

Much of the behaviour of Terminator is based on GNOME Terminal, and we are adding more features from that as time goes by, but we also want to extend out in different directions with useful features for sysadmins and other users. If you have any suggestions, please file wishlist bugs! (see below for the address)

Terminator Features:
* Arrange terminals in a grid
* Tabs
* Drag and drop re-ordering of terminals
* Lots of keyboard shortcuts
* Config file to override gnome-terminal settings
* Simultaneous typing to arbitrary groups of terminals

Install Terminator

Terminator is available from ubuntu repository,search “terminator”(without quotes) in Applications/Ubuntu Software Center and click to install.
Alternatively,just type following command in terminal:

sudo apt-get install terminator

Using Terminator

Terminator can be launch from Applications->Accessories->Terminator.
In right-click menu you can split terminal window by “Split Horizontally” and “Split Vertically” options.

Run this in terminal to see all of Terminator’s keybindings and config options:

man terminator
man terminator_config

For more,see terminator’s mainpage:http://www.tenshu.net/terminator/

Change Gnome-terminal default startup size in Ubuntu

admin — Sun, 29 Nov 2009 02:21:57 +0000

In ubuntu gnome the default terminal size is 80*24 which is unsuitable for widescreen-display.This tutorail shows how to change this default startup size in ubuntu gnome.
In terminal,type this command to edit /usr/share/vte/termcap/xterm:

sudo gedit /usr/share/vte/termcap/xterm

Find out following and change the two numbers:

:co#80:it#8:li#24\

change 80 and 24 to the number as you want (here 80 is the width,24 is the height)

Download Multiple files using wget command

admin — Sat, 21 Nov 2009 09:42:27 +0000

Open terminal from Applications/Accessories/Terminal,create a file

gedit filename

copy and paste all URLs into this file(one url as one line).


http://img.feedsky.com/images/icon_sub_c1s17_d.gif

http://img.feedsky.com/images/icon_subshot01_zhuaxia.gif

http://img.feedsky.com/images/icon_subshot01_pageflakes.gif

http://img.feedsky.com/images/icon_subshot01_rojo.gif

http://img.feedsky.com/images/icon_subshot01_google.gif

http://img.feedsky.com/images/icon_subshot01_netvibes.gif

http://img.feedsky.com/images/icon_subshot01_yahoo.gif

http://img.feedsky.com/images/icon_subshot01_newsgator.gif

http://img.feedsky.com/images/icon_subshot01_bloglines.gif

http://img.feedsky.com/images/icon_subshot01_xianguo.gif

http://img.feedsky.com/images/icon_subshot01_nazha.gif

http://img.feedsky.com/images/icon_subshot01_youdao.gif

http://img.feedsky.com/images/icon_subshot01_qq.gif

http://img.feedsky.com/images/icon_subshot01_douban.gif

Then run this command to download from all URLs:

wget -i filename

How to get line number count and auto-indent in VIM

admin — Mon, 09 Nov 2009 01:06:21 +0000

It becomes really tough while editing file using vim without knowing which line there is.This tutorial shows this howto in Ubuntu/Feroda.
Edit vimrc file:

sudo gedit /etc/vim/vimrc

or (in Feroda) use:

sudo gedit /etc/vimrc

1.Add this line to the end of file.

set nu

This will get the line number count to appear in the vim screen.
2.To enable auto-indent,you can add following into the file:

set autoindent
set cindent

The second line is specially for C.

All manner of Shut down modes in Ubuntu Linux

admin — Wed, 28 Oct 2009 11:03:47 +0000

In Ubuntu,there are a couple of ways to shut down the system.This tutorial lists all manner of them(test on Ubuntu 9.04 Gnome).

1.As all we know,ubuntu desktop version provides shutdown,restart options in top right.

2.Use “shutdown” command to shutdown with a little time delayed.

sudo shutdown -h 3600

When you run this command in terminal(Applications/Accessories/Terminal),system will shutdown 3600 seconds later.If want to restart,use “-r” instead of “-h”.
3.Quick shutdown with “poweroff”,”halt” command.

sudo poweroff
sudo halt

4.Ultimate shutdown with “init”,”telinit”

sudo init 0

This will stop the system “top-level” process,so user processes and other processes will stop,system down.
“sudo init 1″ :single user mode. Equivalent to Windows safe mode.
“sudo init 2″ :multiple user mode.(without NFS)
“sudo init 3″ : global multiple user mode(include NFS).
“sudo init 6″ : restart.
for more use:

man init

5.Remote shutdown using SSH.
Log into remote system and use previous methods.Or use this command:

ssh –l user remotehost sudo shutdown –h now

Frequently-used Bash shell Keyboard shortcuts in Ubuntu

admin — Tue, 27 Oct 2009 12:28:30 +0000

There are a couple of keyboard shortcuts in Ubuntu shell which will save a lot of time if you are comfortable with them.
Delete

ctrl+d elete the character on the cursor
ctrl + h : Delete the character before the cursor
ctrl + k : Delete the character after the cursor
ctrl + u: Delete all characters before the cursor
ctrl + w : Delete the word before the cursor
ctrl + y: Restore the deleted characters by ctrl+u .
ctrl + ? : Undo the last input
alt + r : Undo the last action
alt + d : Delete the word after the cursor

Move the cursor

ctrl + a : Move the cursor to the beginning of the current line.
ctrl + e : Move the cursor to the end of the current line.
ctrl + left arrow key: Move the cursor to the beginning of last word.
ctrl+ right arrow key: Move the cursor to the end of next word.
ctrl + f :Move the cursor to the end of current word.

Others:

alt + u : Change the current word to capital.
alt + l : Change the current word to small letter.
alt + c : Change the first letter of current word to capital.
ctrl + r : Input keywords and search command in history.
alt + > : back to the last command.
ctrl + l : clear current screen,same to “clear” command
ctrl + o : Run command repeatly.
alt+number : Run command n times.(n is the number)

Install Yakuake -terminal in a Quake-style

admin — Mon, 13 Jul 2009 12:01:14 +0000

Yakuake is a quake-style terminal emulator based on KDE Konsole technology.Running yakuake is faster than launching a new terminal.It’s useful for people who frequently open and close terminals for odd tasks.

To install yakuake just running following command in terminal:

sudo apt-get install yakuake

Make it auto run when login,navigate to System–>Preferences–>Startup Applications,click add and type something like following

Next time you login,press F12 to show yakuake and press F12 again to hide.

For settings,just right click on it.