DAY 5 Advanced Linux Shell Scripting for DevOps Engineers with User management
#90DAYSOFDEVOPS
Advanced Linux Shell Scripting for DevOps Engineers with User management
1.You have to do the same using Shell Script i.e using either Loops or command with start day and end day variables using arguments -
-nano loop.sh
-#!/bin/bash
-for ((i=0; i<90; i++)) -do -echo "$i" -done -./loop.sh day 1 90
2.Create a Script to backup all your work done till now. -nano backup.sh
- #!/bin/bash
- #!/bin/bash
- Backup_d="/home/purnima/90daysofdevops/*"
- Backup="/home/purnima/Backupfolder"
- date=$(date +"%d-%b-%Y")
- mkdir $Backup/$date -cp -r $Backup_d $Backup/$date
- echo "Backup created in $Backup/$date"
3.Read About Cron and Crontab, to automate the backup Script
-Cron is the system's main scheduler for running jobs or tasks unattended. A command called crontab allows the user to submit, edit or delete entries to cron. A crontab file is a user file that holds the scheduling information. -The first step in making the crontab script is to issue the crontab-e command. This opens an empty file where you can make the entries that are submitted to the cron script for execution |-----------------------------------------------------------------------| | min hr day/mo mo/yr day/wk shell command | | 0 2 1 backup -0 -uf /dev/rmt0.1 /home/plan.| |-----------------------------------------------------------------------|
4.Read about User Management
-User management refers to the process of creating, modifying, and deleting user accounts on a computer system or network. -User Administration is the process of managing different user accounts and their respective permissions in an operating system
-User account management is one of the many challenges of Linux system administrators. Some of the responsibilities of a system administrator are enabling/disabling user accounts, preserving the home directory, setting user permissions, assigning groups/shells to users, and managing passwords
5.Create 2 users and just display their Usernames
-sudo vim users.txt -ravi:12345 -sastri:54321 -admin:/home/ravi:/bin/bash -admin:/homr/sastri:/bin/bash -cat users.txt -sudo chmod 777 users.txt