Lab # 10

1. Lab # 10 Shell Script con.

2. while loop Syntax: while [ condition ] do command1 command2 command3 .. .... done

3. while loop

4. The case Statement Syntax: case $variable-name in pattern1) command ... command;; pattern2) command ... command;; patternN) command ... command;; *) command ... command;; esac

6. Write shell script using for loop to print the following patterns . 122333444455555 for (( i=1; i<=5; i++ )) do for (( j=1; j<=i; j++ )) do echo -n "$i" done echo ”“ done

7. Write script to print numbers as 5,4,3,2,1, using while loop. The biggest number is supplied as command line argument. i=$1 while test $i != 0 do echo –n "$i ," i=`expr $i - 1` done echo " "

8. Write script to implement get options statement, your script should understand following command line argument :script-name -c -d -m –eWhere options work as-c clear the screen-l show list of files in current working directory-h display history file-d display the date

9. if [ $# -ne 1 ] then echo " Enter one argument –c , –l , –h or -d" else case $1 in " -c ") clear;; " -l ") ls -l;; " -h ") history;; " -d ") date ;; *) echo " Invalid option ";; esac fi