Question

UNIX shell script that will create a backup of the file specified as an argument. This backup file will
be saved in ~/backups/ with -date appended to the original file name. the date shall be in the form
yymmdd:HHmm. Your script should check to make sure the ~/backups/ directory exists before
copying files, creating the directory if necessary. Ensure your script will properly accept a file
argument with path information and strip any path information prior to copying the file.

For example, the file ~/test/lab37q1.sh would be backed up to ~/backups/lab37q1.sh-100407:1340

Answer 1

#backupfile.sh

#!/usr/bin/env bash
# checking the file name in argument
if [ "$#" -ne 1  ]; then
    echo "file is missing"
    exit 1
fi
# creating date time for appending to file name
date_time=$(date +"-%y%m%d:%H%m")
# extracting filename from path
# $1 is the file name passed via as argument
file_name=$(basename -- $1)
# creating director using -p id exist it will not create
mkdir -p ~/backups/
# adding time to file name
file_name+=$date_time
# copying file
cp $1 ~/backups/$file_name
echo "file copied"

# OUTPUT

Please do let me know if u have any concern...