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    Exercise No 3

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    e0323040
    The document contains three shell script exercises for Linux and Ubuntu OS. The first script counts word occurrences in given files, the second calculates the factorial of a user-provided integer, and the third lists all directories within a specified directory. Each exercise includes the code and sample output demonstrating its functionality.

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    © All Rights Reserved
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    Exercise No 3

    Uploaded by

    e0323040
    0 views3 pages
    The document contains three shell script exercises for Linux and Ubuntu OS. The first script counts word occurrences in given files, the second calculates the factorial of a user-provided integer, and the third lists all directories within a specified directory. Each exercise includes the code and sample output demonstrating its functionality.

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    © © All Rights Reserved

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    PDF, TXT or read online from Scribd

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    The document contains three shell script exercises for Linux and Ubuntu OS. The first script counts word occurrences in given files, the second calculates the factorial of a user-provided integer, and the third lists all directories within a specified directory. Each exercise includes the code and sample output demonstrating its functionality.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    0 views3 pages

    Exercise No 3

    Uploaded by

    e0323040
    The document contains three shell script exercises for Linux and Ubuntu OS. The first script counts word occurrences in given files, the second calculates the factorial of a user-provided integer, and the third lists all directories within a specified directory. Each exercise includes the code and sample output demonstrating its functionality.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    You are on page 1of 3

    LINUX COMMANDS AND UBUNTU OS Exercise No 3

    1)Write a shell script that accept a list of file names as arguments count and report
    the occurrence of each word.

    Code:-

    #!/bin/bash

    if [ $# -eq 0 ]; then
    echo "No arguments"
    else
    tr " " "\n" < $1 > temp
    shift
    for i in "$@"; do
    tr " " "\n" < "$i" > temp1
    y=$(wc -l < temp)
    j=1
    while [ $j -le $y ]; do
    x=$(head -n $j temp | tail -1)
    c=$(grep -c "$x" temp1)
    echo "$x $c"
    j=$((j + 1))
    done
    done
    fi

    OUTPUT:

    apple 4
    grape 2
    banana 3
    orange 3
    2).write a shell script to find the factorial of a given integer.

    CODE:-

    #!/bin/bash

    factorial() {
    if [ $1 -le 1 ]; then
    echo 1
    else
    prev=$(factorial $(( $1 - 1 )))
    echo $(( $1 * prev ))
    fi
    }

    echo "Enter a number: "


    read number

    result=$(factorial $number)
    echo "The factorial of $number is $result"

    OUTPUT:-

    ~/19-12-2024$ sh fact.sh
    Enter a number:
    5
    The factorial of 5 is 120

    3)..write a shell script that lists all files in a directory.

    CODE:-

    #!/bin/bash
    echo "Enter directory name:"
    read dir
    if [ -d "$dir" ]; then
    echo "List of directories in the directory:"
    ls -l "$dir" | egrep '^d'
    else
    echo "Enter a proper directory name."
    fi

    OUTPUT:-

    ~/19-12-2024$ sh third.sh
    Enter directory name:
    darshan
    List of directories in the directory:
    drwxr-xr-x 1 runner runner 24 Dec 19 03:35 darshan1

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