Go4Expert - Bash Simple Tricks (Continuation)

This is continuation of my previous article - Bash Simple Tricks Tutorial

Again I am following a question – solution approach to demonstrate my scripts..

Scripts

Write a script that displays the number of lines in a file that starts with a or A

Script :-

displayA.sh

Code:

#!/bin/bash cat $1 | grep ^[aA] | wc -l

Sample file :-

file1

Code:

Aaaaaa ssss aaaaaa wwwww aa

Use :-

Code:

aneesh@aneesh-laptop:~/articles/Bash$ ./displayA.sh file1 3

Write a bash script that displays the no of lines in a file that ends with a 'z'

Script :-

endZ.sh

Code:

#!/bin/bash cat $1 | grep [z]$ | wc -l

Sample file :-

file1

Code:

Aaaaaa ssss aaaaaa wwwww aa Aneeshz lionaneeshz Woah!! wowz llllllo ooooz

Use :-

Code:

aneesh@aneesh-laptop:~/articles/Bash$ ./endZ.sh file1 4

Write a bash script to show to no. of lines in a file that contains 'e or E' after 2 characters …

Script :-

Code:

#!/bin/bash cat $1 | grep '..[eE]' | wc -l

Sample file :-

Code:

aaessss aaaesss aaaaaaaa lionaneesh ssssssssss

Use :-

Code:

aneesh@aneesh-laptop:~/articles/Bash$ ./char2.sh file1 3

Write a shell script that lists all the filenames in the working directory starting with vowels?

Script :-

Code:

#!/bin/bash ls | grep ^[aeiouAEIOU] | wc -l

Sample :-

Code:

aneesh@aneesh-laptop:~/articles/Bash$ ls char2.sh displayA.sh endZ.sh file1 vovelFile.sh

Use :-

Code:

aneesh@aneesh-laptop:~/articles/Bash$ ./vovelFile.sh 1

Write a bash script to play a song using mplayer

Script :-

Code:

#!/bin/bash mplayer $1

Use :-

Code:

aneesh@aneesh-laptop:~/Desktop/Linkin Park - A Thousand Suns {MP3 320kbs}$ ./player.sh music.mp3 MPlayer SVN-r1.0~rc3+svn20090426-4.4.3 (C) 2000-2009 MPlayer Team mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing music.mp3. Audio only file format detected. ========================================================================== Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 AUDIO: 48000 Hz, 2 ch, s16le, 320.0 kbit/20.83% (ratio: 40000->192000) Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3) ========================================================================== AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample) Video: no video Starting playback... A: 16.6 (16.6) of 121.0 (02:01.0) 1.2% MPlayer interrupted by signal 2 in module: play_audio A: 16.8 (16.8) of 121.0 (02:01.0) 1.2%

Write a bash script to play your music using mplayer but after a specified seconds

Script :-

Code:

#!/bin/bash sleep $2 mplayer $1

Use :-

Code:

aneesh@aneesh-laptop:~/Desktop/Linkin Park - A Thousand Suns {MP3 320kbs}$ ./player.sh music.mp3 3 MPlayer SVN-r1.0~rc3+svn20090426-4.4.3 (C) 2000-2009 MPlayer Team mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing music.mp3. Audio only file format detected. ========================================================================== Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 AUDIO: 48000 Hz, 2 ch, s16le, 320.0 kbit/20.83% (ratio: 40000->192000) Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3) ========================================================================== AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample) Video: no video Starting playback... A: 11.7 (11.7) of 121.0 (02:01.0) 1.2%

Stay tuned guyz for more interesting bash scripts articles and hope you like this one too!!
Thanks...