Question

Create an executable bash script named sync. You may find file name pattern matching and the basename command useful. In fact, the sync-skeleton file contains part of the solution to this problem. You may choose to use it anyway you wish. You'll have to create your own test directories (using the mkdir command) and files (using the touch command) to test this script.

You should research the options to the cp command in its main page.

1. The script takes TWO ARGUMENTS. Let's call them dir1 and dir2. If two arguments are not given display an error message to that effect and exit.

2. Verify that both given arguments are paths to directories. If one or neither argument is a path to a directory, display an error message to that effect and exit.

3. If a file exists in dir1 but not in dir2, copy the file from dir1 to dir2 preserving its timestamp. Display a message saying what's being done.

4. If a file exists in dir2 but not in dir1, copy the file from dir2 to dir1 preserving its timestamp. Display a message saying what's being done.

5. If a file is in both directories but is newer in dir1 than the file in dir2, copy the file from dir1 to dir2 preserving its timestamp. Display a message saying what's being done.

6. If a file is in both directories but is newer in dir2 than the file in dir1, copy the file from dir2 to dir1 preserving its timestamp. Display a message saying what's being done.

Answer 1

#!/bin/bash

if [ $# -ne 2 ]
then
   echo "Please provide two arguments"
   exit
fi

if [ -e $1 ] && [ -e $2 ]
then
   if [ -e $1/* ]
   then
       cp -p $1/* $2/
       echo "file copied from $1 to $2"
   else  
       echo "There is no file in the $1"  
   fi

   if [ -e $2/* ]
   then
       cp -p $2/* $1/
       echo "file copied from $2 to $1"
   else  
       echo "There is no file in the $2"  
   fi
else
   echo "directory not exist"
fi

if you have any doubt then please ask me without any hesitation in the comment section below , if you like my answer then please thumbs up for the answer , before giving thumbs down please discuss the question it may possible that we may understand the question different way and we can edit and change the answers if you argue, thanks :)