The course begins by describing easy scripts to automate frequently executed commands and continues by describing conditional logic, user interaction, loops, menus, traps, and functions. This course is meant for system directors UN agency have down the fundamentals of a UNIX operative atmosphere (OE) like the Solaris OE or UNIX system and UN agency would love to scan and perceive the varied boot scripts and write their own scripts to modify their regular tasks.

1. Shell scripts to automate tasks and make your life with
Linux Shell Scripting easier
WHAT IS A SHELL SCRIPT?
The course begins by describing easy scripts to automate frequently executed commands and
continues by describing conditional logic, user interaction, loops, menus, traps, and functions. This
course is meant for system directors UN agency have down the fundamentals of a UNIX operative
atmosphere (OE) like the Solaris OE or UNIX system and UN agency would love to scan and
perceive the varied boot scripts and write their own scripts to modify their regular tasks.
Having the capability to run a script is nice however if the script can’t question the user for data
and should have onerous coded data, the utility of the script are going to be severely restricted.
There are times once a script can wish to grasp a path, what to call a file or folder, the default price
for a variable and then on and then forth. This could be tired a really easy manner mistreatment
scan. Scan can prompt the user to enter data. Before mistreatment scan it's a decent plan to initial
use echo to request what data is required. That method the user is aware of what to enter. A
straightforward example may be seen in listing one wherever scan is employed to urge the name
of a folder that's being created by the script.
Commands designedinto shell:
For this tutorial demonstration, we are going to examine 2 most often used intrinsically commands
during a shell programming atmosphere. Once command is intrinsically to the shell that merely
means the program we are going to run can’t be found anyplace in our Winchester drive (like
different programs such as: mount, who is, etc.)
Read command reads the quality input (ex. keyboard) area unit stores the knowledge during a shell
variable. The foremost common use of this command is receiving answers to queries and prompts
by the running shell script.
Specialshell characters:
Some characters have the special which means within the shell. It’s counseled to avoid this
characters in filenames since they need special which means in the shell and therefore the actual
OS.
File systemTroubleshooting:
Although UNIX could be a terribly stable software system, if it crashes for a few reason (for
example, thanks to an influence outage), one (or more) of your file systems won't be unmounted
properly and so are going to be mechanically checked for errors once UNIX is restarted.

2. In addition,whenthe systembootsthroughoutastandardboot,it perpetuallychecksthe integrityof the
file systems before mounting them. In each cases this can be performed employing a tool named fsck
(“file system check”).