Steady Hand Fun With The Raspberry Pi - Adrirobot

Remember, if the list of files is long, you canpipe the result through the "less" commandbash backup | lessThis turns on (+) the executable (x)permission for this file. To be correct (but notneeded in this simple example) the first line ofthe script should containYou can move through the list with up/downarrow keys or PageUp/PageDown keys,press the q key to quit.The last step is to make this script anexecutable file. This will allow you to run thescript without putting "bash" before the name.To make the file executable, enter thecommand#!/bin/bashThis tells the operating system which programshould be used to launch this script. You canlaunch the script by typing the command./backupchmod +x backupA more complete exampleHere is a more complete version of the script. You may note that it is a lot morecomplex because some extras have been added.The names of the directories are now in variables so that they can be easily changed if you wish.The script uses an "if" statement to check if the backup directory already exists.The cp command uses the --update option to avoid copying files that have not changed recently.#!/bin/bash# Simple program to make a backup of files on the Raspberry Pi# Set the location of my files and the backup locationmydirectory="/home/pi"safeplace="/backup"echo "Starting backup of files from $mydirectory to $safeplace"# Check if the backup directory existsif [ ! ­d $safeplace ]thenfi# Does not exist, need to make a new directoryecho "Making new directory $safeplace"sudo mkdir $safeplace# Change owner of this directory to the user pisudo chown pi $safeplace# Copy all the files in my directory# recursive means keep drilling down into directories to find files# update means only copy files that have been changed since the last backup# verbose means I want to be told what is happeningcp ­­recursive ­­update ­­verbose $mydirectory $safeplaceecho "Backup is finished"19