BASH/C2/Globbing-and-Export-statement/English-timed - Revision history

Pratik kamble at 10:05, 23 March 2017

2017-03-23T10:05:57Z

PoojaMoolya at 06:22, 22 February 2017

2017-02-22T06:22:46Z

PoojaMoolya at 06:20, 22 February 2017

2017-02-22T06:20:24Z

Sandhya.np14 at 16:33, 9 July 2015

2015-07-09T16:33:47Z

Sandhya.np14 at 06:34, 2 July 2015

2015-07-02T06:34:51Z

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Pratik kamble at 09:59, 27 April 2015

2015-04-27T09:59:46Z

PoojaMoolya at 05:13, 5 December 2014

2014-12-05T05:13:50Z

Ranjana: Created page with "'''Title of script''': '''Globbing and Export Statement''' '''Author: '''FOSSEE and spoken-tutorial team '''Keywords: '''Video tutorial, Globbing, Export statement {| bo..."

2014-11-20T06:53:06Z

Created page with "'''Title of script''': '''Globbing and Export Statement''' '''Author: '''FOSSEE and spoken-tutorial team '''Keywords: '''Video tutorial, Globbing, Export statement {| bo..."

New page

'''Title of script''': '''Globbing and Export Statement'''

'''Author: '''FOSSEE and spoken-tutorial team

'''Keywords: '''Video tutorial, Globbing, Export statement

{| border=1
!Time
!Narration

|-
| 00:01
|Welcome to this spoken tutorial on '''Globbing and Export command'''

|-
| 00:06
|In this tutorial, we will learn about

|-
| 00:08
|* '''Globbing'''

|-
| 00:09
|* '''export command'''

|-
| 00:11
| To follow this tutorial, You should be familiar with '''Linux Operating System'''

|-
| 00:18
|If not, for relevant tutorials please visit our website which is are shown.

|-
| 00:24
|For this tutorial I am using

|-
| 00:27
|* '''Ubuntu Linux 12.04''' OS and

|-
| 00:31
|* '''GNU Bash''' version '''4.1.10'''

|-
| 00:35
| Please note '''GNU Bash '' 'version '''4''' or above is recommended to practise this tutorial.

|-
| 00:43
| Let us start with an introduction to '''globbing'''.

|-
| 00:46
|* ''Filename'' or ''pathname'' expansion carried by '''BASH''' is known as '''Globbing'''.

|-
| 00:52
|* '''Globbing''' recognizes and expands '''wildcards.'''

|-
| 00:57
|* It also interprets standard '''wildcard''' characters like

|-
| 01:02
| # <nowiki>* </nowiki>'''(asterix) '''and

|-
| 01:04
|# '''? (Question mark)'''

|-
| 01:05
| Let us understand this with the help of an example.

|-
| 01:09
|Open the terminal window by pressing '''Ctrl+Alt''' and '''T''' keys simultaneously on your keyboard.

|-
| 01:18
|On the '''Terminal ''' type,'''ls space asterix dot sh''' press '''Enter.'''

|-
| 01:27
|It matches all the files having '''.sh extension''' in the present directory.

|-
| 01:34
|Here we can see that all the '''sh''' files are listed.

|-
| 01:40
|Let me clear the prompt,Now type, '''ls space s asterix dot sh''' press '''Enter.'''

|-
| 01:51
| We can see that '''s asterix dot sh''' matches all the files starting with character '''s''' and having '''sh as extension.

|-
| 02:02
| Lets move on ,

|-
| 02:04
| Now '''type, '''ls space opening square bracket a hyphen c closing square bracket asterix dot sh''' press '''Enter.'''

|-
| 02:19
| This will match and display the files starting with letter ''' a''' or '''b '''or '''c.'''

|-
| 02:26
| Observe the output.

|-
| 02:28
|We see a list of all files starting with character ''' a '''or '''b''' or '''c.'''

|-
| 02:35
|And these files have '''sh''' '''extension'''.

|-
| 02:39
|Now, let's go ahead and type '''ls space opening square bracket caret sign a hyphen c closing square bracket asterix dot sh''' press '''Enter.'''

|-
| 02:55
| This will match all the filenames with '''extension''' '''sh.'''

|-
| 03:00
|But will omit those starting with character as ''''a'''' OR ''''b'''' OR ''''c''''

|-
| 03:07
| Observe the output. You will notice that the filenames are not starting with character ''''a'''' , ''''b'''' or ''''c''''.

|-
| 03:16
|Let me clear the prompt,

|-
| 03:19
| Now type, '''ls space opening square bracket capital 'A' small 'a' closing square bracket asterix sign dot sh''' press '''Enter.'''

|-
| 03:34
| This will match filenames starting with upper and lower case of letter ''''A''''.

|-
| 03:40
| See the output.All filenames starting with upper and lower case ''''A''' and extension '''sh''' are listed.

|-
| 03:49
| Now let's see the '''Export command''' in '''BASH.'''

|-
| 03:53
| Switch to the slides.

|-
| 03:55
| In '''Bash''', variables are '''local''' to their own '''Shell'''.

|-
| 04:00
|* '''Local variables''' can be used by same '''Shell ''' or by the current '''Shell'''.

|-
| 04:06
| '''Export command''' Exports a '''variable''' or a '''function''' to the '''environment''' of all '''child processes'''.

|-
| 04:15
| * Can also change a '''local''' variable to a '''global''' variable.

|-
| 04:20
| We will try to understand this with an example.

|-
| 04:24
| Switch to the '''Terminal ''' type, '''myvar equal to sign lion''' press''' Enter.'''

|-
| 04:34
| Now type, '''echo space dollar sign myvar''' press '''Enter.'''

|-
| 04:41
|'''lion''' is printed.

|-
| 04:44
|This is the value assigned to the '''variable myvar.'''

|-
| 04:48
|Now, let's navigate to a new '''Shell'''.

|-
| 04:51
| To go to a new '''Shell''', we can either open a new '''Terminal''' or type, '''slash bin slash bash''' press''' Enter.'''

|-
| 05:03
| Now let's check the value in the variable '''myvar.'''

|-
| 05:07
| Type, '''echo space dollar sign myvar''' press '''Enter.'''

|-
| 05:15
| An empty line is printed.

|-
| 05:17
|This means that the value assigned to '''variable''' '''myvar ''' was not transferred to this '''Shell'''.

|-
| 05:24
|Also, the variable '''myvar ''' is ''' local''' only to the previous '''Shell''' and not to current '''Shell'''.

|-
| 05:32
|We will type '''exit''' to get back to our previous '''Shell'''.

|-
| 05:36
| So, to declare variables '''globally,''' we have to use the '''export command. '''

|-
| 05:43
| Let's learn how.

|-
| 05:46
| Type, '''export space myvar equal to sign lion ''' press''' Enter.'''

|-
| 05:55
| Now type, '''echo space dollar sign myvar''' press '''Enter.'''

|-
| 06:02
|'''lion ''' is displayed.

|-
| 06:05
| Let's navigate to another '''Shell''', type, '''slash bin slash bash''' press ''' Enter.'''

|-
| 06:13
| Let me clear the prompt.

|-
| 06:15
| Now type,'''echo space dollar sign myvar'''.

|-
| 06:22
| '''lion''' is displayed

|-
| 06:25
| This is because we have declared the variable '''myvar''' globally using the export command.

|-
| 06:33
| This brings us to the end of this tutorial.

|-
| 06:36
| Let us summarize. Come back to our slides.

|-
| 06:39
| In this tutorial we learnt,

|-
| 06:41
| * '''Globbing'''

|-
| 06:42
|* '''Export command'''

|-
| 06:44
| As an assignment.

|-
| 06:45
| Write a '''Bash script''' to do all the operations discussed under '''globbing.'''

|-
| 06:51
| Watch the video available at the link shown below

|-
| 06:54
| It summarises the Spoken Tutorial project

|-
| 06:57
| If you do not have good bandwidth, you can download and watch it

|-
| 07:02
|The Spoken Tutorial Project Team

|-
| 07:05
| Conducts workshops using spoken tutorials

|-
| 07:08
| Gives certificates to those who pass an online test

|-
| 07:12
| For more details, please write to contact@spoken-tutorial.org

|-
| 07:20
|Spoken Tutorial Project is a part of the Talk to a Teacher project

|-
| 07:24
| It is supported by the National Mission on Education through ICT, MHRD, Government of India

|-
| 07:31
|More information on this Mission is available at the link shown below.

|-
| 07:37
|The script has been contributed by FOSSEE and Spoken-Tutorial team.

|-
| 07:42
| This is Ashwini from IIT Bombay Signning off.

|-
| 07:47
| Thank you for joining.

|}

@@ Line 57: / Line 57: @@
 |-
 |  01:02
-| # <nowiki>* </nowiki> (asterisk) and '''?''' (Question mark).
+| <nowiki>* </nowiki> (asterisk) and '''?''' (Question mark).
 |-

@@ Line 13: / Line 13: @@
 |-
 | 00:08
-|* '''Globbing'''
+| '''Globbing''', '''export command'''.
-−
-|-
-| 00:09
-|* '''export command'''.
 |-
@@ Line 33: / Line 29: @@
 |-
 |  00:27
-|* '''Ubuntu Linux 12.04''' OS and
+|'''Ubuntu Linux 12.04''' OS and
 |-
 |  00:31
-|* '''GNU Bash''' version '''4.1.10'''
+|'''GNU Bash''' version '''4.1.10'''
 |-
@@ Line 61: / Line 57: @@
 |-
 |  01:02
-| # <nowiki>* </nowiki> (asterisk) and
+| # <nowiki>* </nowiki> (asterisk) and '''?''' (Question mark).
-−
-|-
-|   01:04
-|# '''?''' (Question mark).
 |-
@@ Line 169: / Line 161: @@
 |-
 | 04:06
-| '''Export command'''-
+| '''Export command'''- exports a '''variable''' or a '''function''' to the '''environment''' of all '''child processes'''.
-* exports a '''variable''' or a '''function''' to the '''environment''' of all '''child processes'''.
 |-
 | 04:15
-| * Can also change a '''local''' variable to a '''global''' variable.
+|  Can also change a '''local''' variable to a '''global''' variable.
 |-
@@ Line 282: / Line 273: @@
 |-
 |  06:41
-| * '''Globbing'''
+| '''Globbing''',  '''Export command'''.
-−
-|-
-|  06:42
-|* '''Export command'''.
 |-
 | 06:44
-| As an assignment,
+| As an assignment, Write a '''Bash script''' to do all the operations discussed under '''globbing.'''
-−
-|-
-| 06:45
-| Write a '''Bash script''' to do all the operations discussed under '''globbing.'''
 |-
@@ Line 314: / Line 297: @@
 |-
 |  07:05
-|* Conducts workshops using spoken tutorials.
+| Conducts workshops using spoken tutorials.
 |-
 |  07:08
-|* Gives certificates to those who pass an online test.
+| Gives certificates to those who pass an online test.
 |-

@@ Line 113: / Line 113: @@
 |-
 |  02:04
-| Now '''type, '''ls space opening square bracket a hyphen c closing square bracket asterix dot sh''' press '''Enter.'''
+| Now type, '''ls space opening square bracket a hyphen c closing square bracket asterix dot sh''' press '''Enter.'''
 |-

@@ Line 45: / Line 45: @@
 |-
 |  00:46
-| ''Filename'' or ''pathname'' expansion carried by '''BASH''' is known as '''Globbing'''.
+| '''Filename''' or '''pathname''' expansion carried by '''BASH''' is known as '''Globbing'''.
 |-
@@ Line 57: / Line 57: @@
 |-
 |  01:02
-| <nowiki>* </nowiki> (asterisk) and '''?''' (Question mark).
+|*(asterisk) and '''?''' (Question mark).
 |-

@@ Line 25: / Line 25: @@
 |-
 | 00:18
-|If not, for relevant tutorials please visit our  website which is as shown.
+|If not, for relevant tutorials, please visit our  website which is as shown.
 |-
@@ Line 41: / Line 41: @@
 |-
 |  00:35
-| Please note, '''GNU Bash '' 'version 4 or above is recommended to practice this tutorial.
+| Please note, '''GNU Bash '''version 4 or above is recommended to practice this tutorial.
 |-
@@ Line 81: / Line 81: @@
 |-
 | 01:27
-|It matches all the files having '''.sh''' '''extension''' in the present directory.
+|It matches all the files having ".sh" '''extension''' in the present directory.
 |-
@@ Line 89: / Line 89: @@
 |-
 | 01:40
-|Let me clear the prompt. Now type: '''ls space s asterisk dot sh''' press '''Enter.'''
+|Let me clear the '''prompt'''. Now type: '''ls space s asterisk dot sh''' press '''Enter.'''
 |-
 |  01:51
-| We can see that '''s asterisk dot sh''' matches all the files starting with character '''s''' and having '''sh as  extension.
+| We can see that '''s asterisk dot sh''' matches all the files starting with character '''s''' and having "sh" as  extension.
 |-
@@ Line 117: / Line 117: @@
 |-
 |  02:35
-|And these files have '''sh''' '''extension'''.
+|And these files have "sh" '''extension'''.
 |-
 | 02:39
-|Now, let's go ahead and type: '''ls space opening square bracket caret sign a hyphen c closing square bracket asterisk dot sh''' press '''Enter.'''
+|Now, let's go ahead and type: '''ls space opening square bracket caret-sign a hyphen c closing square bracket asterisk dot sh''' press '''Enter.'''
 |-
 | 02:55
-| This will match all the file-names with '''extension''' '''sh'''
+| This will match all the file-names with '''extension''' "sh"
 |-
@@ Line 133: / Line 133: @@
 |-
 |  03:07
-| Observe the output. You will notice that the file names are not starting with character ''''a'''' , ''''b'''' or ''''c''''.
+| Observe the output. You will notice that the file names are not starting with character 'a', 'b' or 'c'.
 |-
 |  03:16
-|Let me clear the prompt.
+|Let me clear the '''prompt'''.
 |-
 |  03:19
-| Now type: '''ls space opening square bracket capital 'A'  small 'a' closing square bracket asterisk sign dot sh''' press '''Enter.'''
+| Now type: '''ls space opening square bracket capital 'A'  small 'a' closing square bracket asterisk-sign dot sh''' press '''Enter.'''
 |-
 | 03:34
-| This will match file names starting with upper and lower case of letter ''''A''''.
+| This will match file names starting with upper and lower case of letter 'A'.
 |-
 | 03:40
-| See the output. All file names starting with upper and lower case ''''A'''' and extension '''sh''' are listed.
+| See the output. All file names starting with upper and lower case 'A' and extension "sh" are listed.
 |-
@@ Line 157: / Line 157: @@
 |-
 | 03:53
-| Switch to the '''slides'''.
+| Switch to our '''slides'''.
 |-
@@ Line 165: / Line 165: @@
 |-
 | 04:00
-|* '''Local variables''' can be used by same '''Shell ''' or by the current '''Shell'''.
+| '''Local variables''' can be used by same '''Shell ''' or by the current '''Shell'''.
 |-
@@ Line 182: / Line 182: @@
 |-
 |  04:24
-| Switch to the '''Terminal, ''' type: '''myvar equal to sign lion''' press''' Enter.'''
+| Switch to our '''Terminal, ''' type: '''myvar equal to sign lion''' press''' Enter.'''
 |-
 |  04:34
-| Now type: '''echo space dollar sign myvar''' press '''Enter.'''
+| Now type: '''echo space dollar-sign myvar''' press '''Enter.'''
 |-
@@ Line 206: / Line 206: @@
 |-
 | 05:03
-| Now let's check the value in the variable '''myvar.'''
+| Now, let's check the value in the variable '''myvar.'''
 |-
 | 05:07
-| Type: '''echo space dollar sign myvar''' press '''Enter.'''
+| Type: '''echo space dollar-sign myvar''' press '''Enter.'''
 |-
@@ Line 222: / Line 222: @@
 |-
 | 05:24
-|Also, the variable '''myvar ''' is ''' local''' only to the previous '''Shell''' and not to current '''Shell'''.
+|Also, the variable '''myvar ''' is ''' local''' only to the previous '''Shell''' and not to the current '''Shell'''.
 |-
@@ Line 230: / Line 230: @@
 |-
 | 05:36
-| So, to declare variables '''globally,''' we have to use the '''export command. '''
+| So, to declare variables '''global'''ly, we have to use the '''export command. '''
 |-
@@ Line 254: / Line 254: @@
 |-
 | 06:13
-| Let me clear the prompt.
+| Let me clear the '''prompt'''.
 |-
 |  06:15
-|  Now type: '''echo space dollar sign myvar'''.
+|  Now type: '''echo space dollar-sign myvar'''.
 |-
@@ Line 314: / Line 314: @@
 |-
 |  07:05
-| Conducts workshops using spoken tutorials.
+|* Conducts workshops using spoken tutorials.
 |-
 |  07:08
-| Gives certificates to those who pass an online test.
+|* Gives certificates to those who pass an online test.
 |-
@@ Line 326: / Line 326: @@
 |-
 |  07:20
-|Spoken Tutorial Project is a part of the "Talk to a Teacher" project.
+|'''Spoken Tutorial''' Project is a part of the '''Talk to a Teacher''' project.
 |-

@@ Line 1: / Line 1: @@
 {| border=1
-!Time
+|'''Time'''
-!Narration
+|'''Narration'''
 |-
@@ Line 26: / Line 18: @@
 | 00:09
 |* '''export command'''
 |-
@@ Line 75: / Line 66: @@
 |   01:04
 |# '''? (Question mark)'''
 |-
@@ Line 93: / Line 82: @@
 | 01:27
 |It matches all the files having '''.sh extension''' in the present directory.
 |-
@@ Line 118: / Line 106: @@
 | 02:19
 | This will match and display the files starting with letter ''' a''' or '''b '''or '''c.'''
 |-
@@ Line 143: / Line 130: @@
 | 03:00
 |But will omit those starting with character as ''''a'''' OR ''''b'''' OR ''''c''''
 |-
@@ Line 196: / Line 182: @@
 |  04:24
 | Switch to the '''Terminal ''' type, '''myvar equal to sign lion''' press''' Enter.'''
 |-
@@ Line 217: / Line 202: @@
 | 04:51
 | To go to a new '''Shell''', we can either open a new '''Terminal''' or type, '''slash bin slash bash''' press''' Enter.'''
 |-