BOSS-Linux/C2/Basics-of-System-Administration/English-timed - Revision history

Pratik kamble at 07:00, 24 March 2017

2017-03-24T07:00:17Z

Pratik kamble at 06:59, 24 March 2017

2017-03-24T06:59:25Z

Pratik kamble at 10:46, 7 March 2017

2017-03-07T10:46:17Z

Pratik kamble at 10:45, 7 March 2017

2017-03-07T10:45:46Z

Pratik kamble at 10:45, 7 March 2017

2017-03-07T10:45:26Z

Sandhya.np14 at 11:02, 12 August 2015

2015-08-12T11:02:13Z

Sandhya.np14 at 10:03, 12 August 2015

2015-08-12T10:03:12Z

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PoojaMoolya at 08:46, 4 December 2014

2014-12-04T08:46:56Z

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PoojaMoolya at 08:46, 4 December 2014

2014-12-04T08:46:38Z

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PoojaMoolya: Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:02 | Hello and welcome to the Spoken Tutorial on Basics of System Administration in Linux. |- | 00:09 | In this tutoria..."

2014-12-04T06:02:06Z

Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:02 | Hello and welcome to the Spoken Tutorial on Basics of System Administration in Linux. |- | 00:09 | In this tutoria..."

New page

{| border=1
| '''Time'''
| '''Narration'''

|-
| 00:02
| Hello and welcome to the Spoken Tutorial on Basics of System Administration in Linux.

|-
| 00:09
| In this tutorial we will learn the followings.

|-
| 00:13
| adduser

|-
| 00:14
| su

|-
| 00:16
| usermod

|-
| 00:17
| userdel

|-
| 00:18
| id

|-
| 00:19
| du

|-
| 00:20
| df

|-
| 00:22
| I am using Linux for this tutorial.

|-
| 00:27
| As a prerequisite please go through the spoken tutorial on '''General Purpose Utilities in Linux''' which is available on this website

|-
| 00:39
| One must have admin access in order to execute the commands shown.

|-
| 00:47
| Let us first learn how to create a new user.

|-
| 00:53
| The '''adduser''' command will create a new user login for us along with authentication.

|-
| 01:01
| We can add any user account with the help of '''sudo''' command.

|-
| 01:06
| Let me give you a brief explanation about the '''sudo''' command.

|-
| 01:11
| '''Sudo''' command allows the administrative user to execute a command as a super user.

|-
| 01:19
| The '''sudo''' command has many options. We will learn about the options as we go further in this tutorial.

|-
| 01:27
| Lets now learn how to create a '''New User'''.

|-
| 01:32
| I have already invoked the '''Terminal''' here.

|-
| 01:36
| Here type the command '''sudo space adduser''' and press Enter.

|-
| 01:45
| You will be prompted for a password.

|-
| 01:48
| I will give the '''Admin''' password here and Enter.

|-
| 01:54
| The typed password on the terminal, is not visible.

|-
| 01:58
| So we have to type the password carefully.

|-
| 02:03
| Once done, a message ''' adduser : Only one or two names allowed''' is displayed.

|-
| 02:14
| So let us create a new user account named '''duck'''.

|-
| 02:21
| Type the command :

|-
| 02:23
| '''sudo space adduser space duck''', and press Enter.

|-
| 02:33
| We have created a new user called '''duck'''.

|-
| 02:36
| In the process of creating a new user, a seperate '''home''' directory for that user has also been created.

|-
| 02:46
| Please note that we will be prompted for a new password for the user '''duck'''.

|-
| 02:52
| Type the password of your choice, in my case i am going to type '''duck''' as the password and press Enter.

|-
| 03:04
| Please type the new password again.

|-
| 03:07
| The password is asked twice for security reasons and for confirmation.

|-
| 03:13
| Now our password for the new user is updated.

|-
| 03:18
| We will be asked for other details too.

|-
| 03:22
| But for the time being, I will enter only the '''Full Name''' as '''duck''' and leave the rest of the details blank by pressing the Enter key.

|-
| 03:33
| Enter.

|-
| 03:34
| I will confirm this by entering “y”.

|-
| 03:39
| This is to confirm that all the information is correct.

|-
| 03:43
| Let us now check, if the user account has been created.

|-
| 03:48
| To do this, please type the at the command prompt

|-
| 03:51
| '''ls /(slash) home'''

|-
| 03:56
| and press Enter.

|-
| 03:58
| To show the list of users in the home folder this command is used.

|-
| 04:05
| And here is our newly created user named '''duck'''.

|-
| 04:10
| Let me switch back to the slides.

|-
| 04:13
| Now the next command is the '''su''' command

|-
| 04:18
| '''su''' stands for '''Switch User'''.

|-
| 04:21
| This command is useful for switching from the current user to another user.

|-
| 04:26
| Let us go to the Terminal now.

|-
| 04:30
| Enter the command '''su space hyphen space duck''' on the '''terminal''' and press Enter.

|-
| 04:41
| You will be prompted for a password.

|-
| 04:44
| I shall type the user '''duck''' password here please recall that it was '''duck''' itself.

|-
| 04:51
| Please notice that, the Terminal switches from the previous user to the new user, which is “duck” in our case.

|-
| 05:02
| To logout from this user, type '''logout''' and hit Enter.

|-
| 05:10
| Now the terminal logs out from the current user '''duck''' and comes back to the previous user account, which is '''vinhai''' in our case.

|-
| 05:18
| Let us learn about the '''usermod''' command.

|-
| 05:23
| The '''usermod''' command

|-
| 05:24
| Enables a super user or root user to modify the settings of other user accounts such as

|-
| 05:33
| Change the password to no password or empty password.

|-
| 05:37
| Show the date on which the user account will be disabled.

|-
| 05:42
| Let us try this command and see.

|-
| 05:44
| Let me switch to the terminal now.

|-
| 05:46
| Let me show you how to set a date of expiry for the user account '''duck.'''

|-
| 05:52
| Here at the command prompt type

|-
| 05:56
| ''' sudo space usermod space -(hyphen)e space 2012-(hyphen)12-(hyphen)27 space duck '''

|-
| 06:21
| and press Enter.

|-
| 06:25
| The user account expiry date is set as mentioned in the command here with the help of the option “-e”.

|-
| 06:34
| Now you have set an expiry date for the user account '''duck'''.

|-
| 06:39
| Let us now talk about the '''uid''' and '''gid''' commands.

|-
| 06:45
| '''id – command''' is used to check the identities of all the users and groups

|-
| 06:51
| To know about the identity of the user, we use '''id space -(hyphen)u'''.

|-
| 07:00
| To know about the identity of the group users, it is '''id space -(hyphen)g'''

|-
| 07:08
| Now lets work on this.

|-
| 07:10
| At the terminal, let us type '''id''' and press Enter.

|-
| 07:17
| Now we can see the User IDs and Group IDs on the system that we are using

|-
| 07:25
| To get only the user id, we use “-(hyphen)u” option.

|-
| 07:30
| Let us type the command, '''id space -(hyphen)u'''

|-
| 07:36
| and press enter.

|-
| 07:38
| Now we can see only the ids of the users.

|-
| 07:42
| But what if we need to know the names of the users?

|-
| 07:47
| To find that out, we will type

|-
| 07:50
| ''' id space -(hyphen)n space -(hyphen)u''' on the terminal here and press Enter.

|-
| 08:00
| Now we can see the names of the users instead of their ids.

|-
| 08:08
| Let us now learn the commands for Group IDs.

|-
| 08:12
| Lets type ''' id space -(hyphen)g'''.

|-
| 08:17
| Here we can see the group ids.

|-
| 08:20
| If we want to view all the current user's group IDs, type

|-
| 08:26
| '''id space -(hyphen) (capital)G''' and press Enter.

|-
| 08:32
| Please notice that I have typed G in capital letter.

|-
| 08:38
| See the result for yourself.

|-
| 08:40
| Now let us learn how to delete a user account.

|-
| 08:44
| For this we use '''userdel''' command.

|-
| 08:48
| We can delete an user account permanently with the help of the '''userdel''' command.

|-
| 08:54
| Lets try this on the terminal.

|-
| 08:56
| Here type '''sudo space userdel space -(hyphen)r space duck'''.

|-
| 09:09
| I have used the -(hyphen)r option.

|-
| 09:12
| This is to remove the user along with his home directory.

|-
| 09:17
| Let us press Enter and see what happens.

|-
| 09:21
| Now the user '''duck''' has been deleted.

|-
| 09:25
| Check this by typing

|-
| 09:28
| '''ls space /(slash)home''' and press the Enter.

|-
| 09:35
| We will find that, the user account '''duck''' has been deleted.

|-
| 09:40
| Let me go back to the slides now.

|-
| 09:43
| Some of the useful commands in Linux System Administration are “df” and “du”

|-
| 09:50
| The '''df''' command gives a report on the free space available on the disk.

|-
| 09:55
| And the '''du''' command gives a report on how much space a file has occupied.

|-
| 10:00
| Please try these two commands and find the output for yourself as an assignment.

|-
| 10:06
| Let us shift to the terminal, I shall show you a few useful options used with the “df” command.

|-
| 10:13
| Please type df space -(hyphen)h and press Enter.

|-
| 10:20
| Here it shows the size of the File system, and the space is used.

|-
| 10:25
| It also shows the space mounted on in a human readable format.

|-
| 10:34
| Let us now try some options with the “du” command

|-
| 10:37
| At this point i assume that you have created some text files in your home folder.

|-
| 10:44
| If not please refer to the tutorial on '''General Purpose Utilities in Linux'''

|-
| 10:51
| I have already created some text files in my home directory to execute the commands.

|-
| 10:58
| Goto '''home folder''' on the terminal by typing

|-
| 11:03
| ''' cd space /(slash) home''' and press Enter.

|-
| 11:07
| Then type '''du space -(hyphen)s space *. (astrix) dot txt''' and press enter.

|-
| 11:21
| This command will give you a report on the txt files available in the directory along with its file sizes.

|-
| 11:30
| As an assignment, at the command prompt type

|-
| 11:35
| '''du space -(hyphen)ch space *.(astrix dot)txt''' and see what happens.

|-
| 11:46
| Let me go back to the slides.

|-
| 11:48
| To summarise, we have learnt:

|-
| 11:51
| '''adduser''' command to create a new user.

|-
| 11:53
| “su” command to switch from one user to another user.

|-
| 11:56
| “usermod” command to change the user account settings.

|-
| 12:00
| “userdel” command to delete the user account.

|-
| 12:03
| id command to know the information about user ids and group ids.

|-
| 12:07
| “df” command to check the file system size and its availability.

|-
| 12:11
| “du” command to check the space occupied by a file.

|-
| 12:15
| This brings us to the end of this tutorial on “Basics of system administration”

|-
| 12.20
| The video available at this url,

|-
| 12:24
| Summarises the Spoken Tutorial project.

|-
| 12:27
| If you do not have good bandwidth, you can download and watch it.

|-
| 12:31
| We conduct workshops using spoken tutorials. We also give certificates to those who pass an online test. Please contact us for more details.

|-
| 12:41
| Spoken Tutorial is a part of the “Talk to a Teacher” project

Supported by the National Mission on Education through ICT (NMEICT), MHRD, Government of India.

|-
| 12:50
| More information is available on this url

|-
| 12:55
| This script for this tutorial has been contributed by Praveen and this is Namita from IIT Bombay signing off. Thank you for joining

@@ Line 13: / Line 13: @@
 |-
 | 00:13
-|* '''adduser'''
+|* '''adduser''' '''su'''
-−
-|-
-| 00:14
-|* '''su'''
 |-
 | 00:16
-|* '''usermod'''
+|* '''usermod''' '''userdel'''
-−
-|-
-| 00:17
-|* '''userdel'''
 |-
 | 00:18
-|* '''id'''
+|* '''id'''  '''du'''
-−
-|-
-| 00:19
-|* '''du'''
 |-
@@ Line 157: / Line 145: @@
 |-
 | 03:33
-|  Enter.
+|  Enter.I will confirm this by entering “y”.
-−
-|-
-| 03:34
-|  I will confirm this by entering “y”.
 |-
@@ Line 241: / Line 225: @@
 |-
 | 05:23
-|  The '''usermod''' command
+|  The '''usermod''' command enables a '''super''' user or '''root''' user to modify the settings of other user accounts such as:
-−
-|-
-| 05:24
-|  enables a '''super''' user or '''root''' user to modify the settings of other user accounts such as:
 |-

@@ Line 520: / Line 520: @@
 |-
-| 12.20
+| 12:20
 |  The video available at this url,

@@ Line 229: / Line 229: @@
 |-
 | 05:33
-|* Change the password to no password or empty password.
+|Change the password to no password or empty password.
 |-
 | 05:37
-|* Show the date on which the user account will be disabled.
+|Show the date on which the user account will be disabled.
 |-

@@ Line 489: / Line 489: @@
 |-
 | 11:51
-|* "adduser" command to create a new user.
+|"adduser" command to create a new user.
 |-
 | 11:53
-|* “su” command to switch from one user to another user.
+|“su” command to switch from one user to another user.
 |-
 | 11:56
-|* “usermod” command to change the user account settings.
+|“usermod” command to change the user account settings.
 |-
 | 12:00
-|* “userdel” command to delete the user account.
+|“userdel” command to delete the user account.
 |-
 | 12:03
-|* "id" command to know the information about '''user ids''' and '''group ids'''.
+| "id" command to know the information about '''user ids''' and '''group ids'''.
 |-
 | 12:07
-|*  “df” command to check the file system size and its availability.
+| “df” command to check the file system size and its availability.
 |-
 | 12:11
-|*  “du” command to check the space occupied by a file.
+|  “du” command to check the space occupied by a file.
 |-

@@ Line 13: / Line 13: @@
 |-
 | 00:13
-|* '''adduser''' '''su'''
+|'''adduser''' '''su'''
 |-
 | 00:16
-|* '''usermod''' '''userdel'''
+|'''usermod''' '''userdel'''
 |-
 | 00:18
-|* '''id'''  '''du'''
+|'''id'''  '''du'''
 |-
 | 00:20
-|* '''df'''
+|'''df'''
 |-

@@ Line 153: / Line 153: @@
 |-
 | 03:22
-|  But for the time being, I will enter only the '''Full Name''' as "duck" and leave the rest of the details blank by pressing the Enter key.
+|  But for the time being, I will enter only the '''Full Name''' as "Duck" and leave the rest of the details blank by pressing the Enter key.
 |-
@@ Line 221: / Line 221: @@
 |-
 | 04:44
-|  I shall type the user '''duck''' password here, please recall that it was '''duck''' itself.
+|  I shall type the user '''duck''' password here, please recall that it was "duck" itself.
 |-
@@ Line 241: / Line 241: @@
 |-
 | 05:23
-|  The '''usermod''' command-
+|  The '''usermod''' command
 |-
 | 05:24
-|  Enables a '''super''' user or '''root''' user to modify the settings of other user accounts such as:
+|  enables a '''super''' user or '''root''' user to modify the settings of other user accounts such as:
 |-
 | 05:33
-|  Change the password to no password or empty password.
+|* Change the password to no password or empty password.
 |-
 | 05:37
-|  Show the date on which the user account will be disabled.
+|* Show the date on which the user account will be disabled.
 |-
@@ Line 269: / Line 269: @@
 |-
 | 05:52
-|  Here at the command prompt, type:
+|  Here, at the command prompt, type:
 |-
@@ Line 313: / Line 313: @@
 |-
 | 07:17
-|  Now we can see the '''User IDs''' and '''Group IDs''' on the system that we are using.
+|  Now, we can see the '''User IDs''' and '''Group IDs''' on the system that we are using.
 |-
@@ Line 329: / Line 329: @@
 |-
 | 07:38
-|  Now we can see only the 'id's of the users.
+|  Now, we can see only the 'id's of the users.
 |-
@@ Line 341: / Line 341: @@
 |-
 | 07:50
-|  ''' id space -(hyphen) n space -(hyphen) u''' on the terminal here and press Enter.
+|  '''id space -(hyphen) n space -(hyphen) u''' on the terminal here and press Enter.
 |-
@@ Line 417: / Line 417: @@
 |-
 | 09:28
-|  '''ls space /(slash)home''' and press  Enter.
+|  '''ls space /(slash) home''' and press  Enter.
 |-
 | 09:35
-|  We will find that, the user account '''duck''' has been deleted.
+|  We will find that the user account '''duck''' has been deleted.
 |-
@@ Line 441: / Line 441: @@
 |-
 | 10:00
-|  Please try these two commands and find the output for yourself as an assignment.
+|  Please try these two commands and find the '''output''' for yourself as an assignment.
 |-
@@ Line 449: / Line 449: @@
 |-
 | 10:13
-|  Please type: df space -(hyphen)h and press Enter.
+|  Please type: '''df space -(hyphen)h''' and press Enter.
 |-
@@ Line 493: / Line 493: @@
 |-
 | 11:30
-|  As an assignment, at the command prompt type:
+|  As an assignment, at the command prompt, please type:
 |-
@@ Line 545: / Line 545: @@
 |-
 | 12:24
-|  Summarizes the '''Spoken Tutorial''' project.
+|  summarizes the '''Spoken Tutorial''' project.
 |-