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Bash Simple Tricks (Continuation)

Discussion in 'Unix' started by lionaneesh, Jan 31, 2011.

  1. lionaneesh

    lionaneesh New Member

    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...
     
  2. lionaneesh

    lionaneesh New Member

    Thanks for accepting...
    And I think other people can post the questions they want to be solved in my next article...
     

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