NT 1430
UNIT 3
Bash Scripts: * Script –commands written to a file. * Bash- a command processor a Unix shell

Bash History:
It was written by a man called Brian Fox. It was part of the GNU Project. The first release was 1989. It was a improvement and replacement to something called the Borne shell

The Borne Shell:
The creator was Stephen Borne. His employer was AT&T Labs. It was a Unix Shell he developed for Unix 7. Like everything it was replacing a older program called Thompson shell.

The Borne Again Shell:
Bash
Borne
Again
Shell
A free replacement to Borne shell

Commands in Linux
Mkdir- Make Directory rmdir- remove directory cd- Change directory
Mv- Change name move directory
Pwd – print working directory chmode-Change file access Permissions
Commands are what tell Linux what to do.

Chapter 7: 1. It waits for the process to be finished. You can give it multiple commands it will execute them in order.
3.Process Identification Number, The numbers tell you what commands are running in the background. Type ps
4.
a. $ls section*
b. $ls section[1-3] $ ls section?
c. $ls I*
d.$ls *[13]
8.
a. $ grep \$ID < * .c > id_list
b. $ grep –I suzi < addresses
c. $ grep –il memo *.txt > memoranda_files
D. $ file /usr/bin*|grep “Again shell script” | sort –r

Chapter 9
1.
You get permission denied, Not executable search though path 2. With Bash you can use these commands, $ . scriptfile, $ source script file 3. Path shows the pathways for common programs to make them easy to use. a. Export PATH=/usr/local/bin;/:/usr/… b. /usr/bin it goes in order c. Cd to the usr/bin directory then use command ./doit d. Export PATH=$PATH:/usr/games 4. $ person=jenny a. jenny b. $person 5.
a. $chmod +x journal.sh
b. It reads it from the first imput

6.A. $pwd /home/jenny/grants $ CDPATH=$(pwd) $ cd $ cd biblios
B. $ pwd
/home/jenny/grants
$ CDPATH=$(pwd)
$ cd $HOME/biblios

8. No sleep out put,/etc/inittab,

10. $ cat a pid=$PPID line=$(ps | grep $pid) echo $line | cut --delimiter=" " --fields=4

11.
a.2 each