Enable Remote desktop in Ubuntu

Download Tightvnc from click here

1.Go to: System => Preferences => Remote Desktop
Check the boxes Allow other users to view your desktop and Allow other users to control your desktop, Also don't forget to set a desktop for security reasons.

2.Now you just need to know the ip-address your Ubuntu machine uses. To do this right click the icon with the two displays in your systray and click Connection information.

3.Now able to connect to your Ubuntu machine using a VNC client

4.If you want to connect to your PC outside your network you will need to know your routers outside ip-address and make a port forward in your router to your Ubuntu machine using port: 5900. You can use this website to obtain your outside ipaddress : whatismyip.com.

(Note : if you have a static ip no need of port forwarding)

Using Terminal Server Client Remote Desktop on Ubuntu Linux

Remote GUI administration of linux system in windows

Installing Xming on Windows

In order to do X11 on Microsoft Windows, you need to install "X Server" software on the Windows box. You'll want to download and install both Xming and Xming-fonts.


Configuration of sshd and X11

In order for the local X Server (Xming - running on your Windows system) to talk to the remote Linux server, you'll need to verify some settings on the Linux server. First up is configuration of the sshd daemon (typically /etc/ssh/sshd_config for OpenSSH). Look for the following 2 lines and make sure they are configured correctly:

X11Forwarding yes
#X11UseLocalhost yes

By default, OpenSSH ships with X11Forwarding set to "no" but the default for X11UseLocalhost is "yes". So you should only have to add the "X11Forwarding yes" line.

Create a PuTTY session

a PuTTY public-key pair. If you need to install a generated PuTTY key (maybe you want to use a separate PuTTY key for X11 forwarding), then here are the directions for OpenSSH.

(login as yourself or as root and then "su" to your username)
# cd ~/.ssh
# cat > machinename@svn.pub
(paste in PuTTY key)
# ssh-keygen -i -f machinename@svn.pub >> authorized_keys
(Ctrl-D to exit)


1. Right-click on the Pageant icon in the system tray and choose "New Session".
2. Enter the hostname (i.e. 192.168.1.1)
3. Go to the Connection -> SSH -> X11 tab
4. Turn ON "X11 forwarding"
5. Display location should be: localhost:0
6. Go back to the Session tab
7. Enter a name in the Saved Sessions text box (i.e. "MyHost-X11") and click on "Save"
8. Click the "Open" button to connect to the server


If all goes well, you should see a line like:

/usr/bin/xauth: creating new authority file /home/thomas/.Xauthority

Which tells us that SSH is ready to do some X forwarding.

Fire up Xming

If you haven't already ran Xming you should run XLaunch and just roll through the defaults. Now, in the PuTTY window that is sitting at a command prompt, try:

# xeyes

And you should see the xeyes application open up on your Windows system. If you want to continue to start up other X applications, put an ampersand (&) at the end of the line.

More advanced stuff


1. Fire up XLaunch
2. Select "One window" and click "Next"
3. Select "Start a program" and click "Next"
4. The start program should be either "gnome-session" or "startkde"
5. Select Run Remote using PuTTY (plink.exe) and turn on the compression option.
6. Enter the IP address or hostname in "Connect to computer" of the Linux box that you are connecting to
7. Enter your username in the "Login as user"
8. Click the "Next" button
9. In the "Additional parameters", enter "-screen 0 1024 768" which will set screen zero to be 1024x768
10. If you run your SSH server on a non-standard port, enter "-P port" in the PuTTY extra options field (run "plink" at a Windows command prompt to see the possible options)
11. Save your configuration file and click "Finish"

Linux Funny wallpaper of the week

Funny wallpaper of the week


Click on the image for large size

Quick reference Linux commands

alias - Create an alias

awk - Find and Replace text, database sort/validate/index

break - Exit from a loop

builtin - Run a shell builtin

cal - Display a calendar

cse - Conditionally perform a command

cat - Display the contents of a file

cd - Change Directory

cfdisk - Partition table manipulator for Linux

chgrp - Change group ownership

chmod - Change access permissions

chown - Change file owner and group

chroot - Run a command with a different root directory

cksum - Print CRC checksum and byte counts clear Clear terminal screen

cmp - Compare two files

comm - Compare two sorted files line by line

command - Run a command - ignoring shell functions

continue - Resume the next iteration of a loop

cp - Copy one or more files to another location

cron - Daemon to execute scheduled commands

crontab - Schedule a command to run at a later time

csplit - Split a file into context-determined pieces

cut - Divide a file into several parts

date - Display or change the date & time

dc - Desk Calculator

dd - Data Dump - Convert and copy a file

declare - Declare variables and give them attributes


df - Display free disk space

diff - Display the differences between two files

diff3 - Show differences among three files

dir - Briefly list directory contents

dircolors - Colour setup for `ls'

dirname - Convert a full pathname to just a path

dirs - Display list of remembered directories

du - Estimate file space usage

echo - Display message on screen ed A line-oriented text editor (edlin)

egrep - Search file(s) for lines that match an extended expression eject Eject CD-ROM

enable - Enable and disable builtin shell commands

env - Display, set, or remove environment variables

eval - Evaluate several commands/arguments

exec - Execute a command exit Exit the shell

expand - Convert tabs to spaces

export - Set an environment variable

expr - Evaluate expressions

factor - Print prime factors

false - Do nothing, unsuccessfully

fdformat - Low-level format a floppy disk

fdisk - Partition table manipulator for Linux

fgrep - Search file(s) for lines that match a fixed string

find - Search for files that meet a desired criteria

fmt - Reformat paragraph text

fold - Wrap text to fit a specified width.

for - Expand words, and execute commands format Format disks or tapes free Display memory usage

fsck - Filesystem consistency check and repair.

function - Define Function Macros

gawk - Find and Replace text within file(s)

getopts - Parse positional parameters

grep - Search file(s) for lines that match a given pattern

groups - Print group names a user is in

gzip - Compress or decompress named file(s)

hash - Remember the full pathname of a name argument

head - Output the first part of file(s)

history - Command History

hostname - Print or set system name

id - Print user and group id's

if - Conditionally perform a command

import - Capture an X server screen and save the image to file

info - Help info

install - Copy files and set attributes

join - Join lines on a common field

kill - Stop a process from running

less - Display output one screen at a time

let - Perform arithmetic on shell variables

ln - Make links between files

local - Create variables

locate - Find files

logname - Print current login name

logout - Exit a login shell

lpc - Line printer control program

lpr - Off line print lprint Print a file lprintd Abort a print job lprintq List the print queue

lprm - Remove jobs from the print queue

ls - List information about file(s)

m4 - Macro processor

man - Help manual

mkdir - Create new folder(s)

mkfifo - Make FIFOs (named pipes)

mknod - Make block or character special files

more - Display output one screen at a time

mount - Mount a file system

mtools - Manipulate MS-DOS files

mv - Move or rename files or directories

nice - Set the priority of a command or job

nl - Number lines and write files

nohup - Run a command immune to hangups

passwd - Modify a user password

paste - Merge lines of files pathchk Check file name portability

popd - Restore the previous value of the current directory

pr - Convert text files for printing printcap Printer capability database printenv Print environment variables

printf - Format and print data

ps - Process status

pushd - Save and then change the current directory

pwd - Print Working Directory

quota - Display disk usage and limits

quotacheck - Scan a file system for disk usage

quotactl - Set disk quotas

ram - ram disk device

rcp - Copy files between two machines.

read - read a line from standard input

readonly - Mark variables/functions as readonly remsync Synchronize remote files via email

return - Exit a shell function

rm - Remove files

rmdir - Remove folder(s)

rpm - Remote Package Manager

rsync - Remote file copy (Synchronize file trees) screen Terminal window manager

sdiff - Merge two files interactively

sed - Stream Editor

select - Accept keyboard input

seq - Print numeric sequences

set - Manipulate shell variables and functions

shift - Shift positional parameters

shopt - Shell Options

shutdown - Shutdown or restart linux

sleep - Delay for a specified time

sort - Sort text files

source - Run commands from a file `.'

split - Split a file into fixed-size pieces

su - Substitute user identity

sum - Print a checksum for a file

symlink - Make a new name for a file

sync - Synchronize data on disk with memory

tac - Concatenate and write files in reverse

tail - Output the last part of files

tar - Tape ARchiver

tee - Redirect output to multiple files

test - Evaluate a conditional expression

time - Measure Program Resource Use

times - User and system times

touch - Change file timestamps

top - List processes running on the system

traceroute - Trace Route to Host trap Run a command when a signal is set(bourne)

tr - Translate, squeeze, and/or delete characters

true - Do nothing, successfully

tsort - Topological sort

tty - Print filename of terminal on stdin

type - Describe a command

ulimit - Limit user resources

umask - Users file creation mask umount Unmount a device

unalias - Remove an alias

uname - Print system information

unexpand - Convert spaces to tabs

un
iq - Uniquify files

units - Convert units from one scale to another

unset - Remove variable or function names

unshar - Unpack shell archive scripts

until - Execute commands (until error)

useradd - Create new user account

usermod - Modify user account

users - List users currently logged in

uuencode - Encode a binary file

uudecode - Decode a file created by uuencode v Verbosely list directory contents (`ls -l -b') vdir Verbosely list directory contents (`ls -l -b')

watch - Execute/display a program periodically

wc - Print byte, word, and line counts

whereis - Report all known instances of a command

which - Locate a program file in the user's path.

while - Execute commands

who - Print all usernames currently logged in whoami Print the current user id and name (`id -un')

xargs - Execute utility, passing constructed argument list(s)

yes - Print a string until interrupted

.period - Run commands from a file