Linux 1) Write a script which takes 3 files as arguments. If these files have a

Question

Linux

1) Write a script which takes 3 files as arguments. If these files have a total of more than 100 lines it displays the message "Too long" and otherwise it concatenates them and saves the result in a file called done . Your script can only have one if/else and no variables

2)We've seen operations [ - e object] to test if something exists. More specific operations such as [ - f object] or [ - d object] will test if it exists and is a file or a directory, respectively. There are a few more like that: - r, - w, and - x will check whether the file has the permissions r, w, or x for example. The - O will check if it's owned by the current user. Write a script that takes a file as argument. If the file doesn’t exist, it says so to the user. If the file exists, it displays what permissions are currently turned on for this file, and tells the user whether he/she can change them

Explanation / Answer

#!/bin/bash

if ! [ -f $1 ];

then

        echo "$1 Not Exist"

        exit 0

else

        echo ""

fi

if ! [ -f $2 ];

then

        echo "$2 not Exist"

        exit 0

fi

if ! [ -f $3 ];

then

        echo "$3 not Exist"

exit 0

fi

if ! [ -r $1 ];

then

        echo "$1 has read permission issue"

        exit 0

fi

if ! [ -r $2 ];

then

        echo "$2 has read permission issue"

        exit 0

fi

if ! [ -r $3 ];

then

        echo "$3 has read permission issue"

exit 0

fi

if ! [ -O $1 ];

then

        echo "$1 has ownership permission issue"

        exit 0

fi

if ! [ -O $2 ];

then

        echo "$2 has ownership permission issue"

        exit 0

fi

if ! [ -O $3 ];

then

        echo "$3 has ownership permission issue"

exit 0

fi

if [[ $(cat $1 $2 $3| wc -l) -gt 100 ]];

then

        echo "Too Long"

else

        cat $1 $2 $3>done

        echo "File copied successfully!!!"

fi

exit 0

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