How enable/view line number in gedit

Ubuntu Question:
go to Edit --> preferences

 

 

Setting Static IP in Ubuntu Desktop: Using /etc/network/interfaces

To change IP to static using: /etc/network/interfaces

Step 1: Open /etc/network/interfaces /* Login as super user to execute this */
 / 

Step 2: Enter below details in file 
----------------------------------------------------------

auto eth0
iface eth0 inet static
address 192.168.1.1     /* Address u want */
netmask 255.255.255.0   /* Subnet mask */
gateway 192.168.1.1     /* Default mask */

------------------------------------------------------- 
Step 3: 

Save above changes

Step 4: 
/etc/init.d/networking restart
to Restart service with static IP 

Note: To change this to Dynamic IP again please follow reverse process step4 to be run as it is.

Playing with services in UBUNTU; Debugging a service in UBUNTU

Lets take example of service called "ssh" used for initiating secure connection with remote machine.
 
To collect debug logs in case of ssh please execute;
ssh -vvv hostname@ ipaddres
sftp -vvv hostname@ ipaddres  you will get lot of logs



To check status of a service
$ sudo status service ssh /* will show you status of service*/

Ubuntu Linux: To Start OpenSSH Server;Execute below command 

$ sudo /etc/init.d/ssh start
or
$ sudo service ssh start

Ubuntu Linux: Stop OpenSSH server

Type the following command:
$ sudo /etc/init.d/ssh stop
OR
$ sudo service ssh stop

Ubuntu Linux: Restart OpenSSH server

Type the following command:
$ sudo /etc/init.d/ssh restart
OR
$ sudo service ssh restart

Ubuntu Linux: See status of OpenSSH server

Type the following command:


$ sudo /etc/init.d/ssh status
OR
$ sudo service ssh status
Note: sftp,scp always make ssh connection. 

Command to check UBUNTU( Diribution -specific release) version

Command is :   

$lsb_release -a
lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 12.04.4 LTS
Release:    12.04
Codename:    precise


 $ man lsb_release(1)

NAME
       lsb_release - print distribution-specific information

SYNOPSIS
       lsb_release [options]

DESCRIPTION
       The lsb_release command provides certain LSB (Linux Standard Base) and distribution-specific information.

       If no options are given, the -v option is assumed.

OPTIONS
       The  program  follows  the  usual GNU command line syntax, with long options starting with two dashes (`--').  A summary of
       options are included below.

       -v, --version
              Show the version of the LSB against which your current installation is compliant.  The version  is  expressed  as  a
              colon separated list of LSB module descriptions.

       -i, --id
             Display the distributor's ID.

       -d, --description
              Display a description of the currently installed distribution.

       -r, --release
              Display the release number of the currently installed distribution.

       -c, --codename
              Display the code name of the currently installed distribution.

       -a, --all
              Display all of the above information.

       -s, --short
              Use the short output format for any information displayed.  This format omits the leading header(s).

       -h, --help
              Show summary of options.

NOTES
       This  is  a  reimplementation  of  the  lsb_release  command provided by the Free Standards Group.  Any bugs are solely the
       responsibility of the author below.

       Detection of systems using a mix of packages from various distributions or releases is something of a black art;  the  cur‐
       rent  heuristic  tends  to assume that the installation is of the earliest distribution which is still being used by .B apt
       but that heuristic is subject to error.

SEE ALSO
       lsb(8)

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