Linux Command exercise: Case selection Structure Statement exercise

Practice One:

1, receive the parameter, prompt input parameter is what type:

#!/bin/bash

#program:

#接收参数并输出参数类型

#history Donggen 2016-10-27-17:20

Path=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bansh

Export PATH

Case $ in

[[:d Igit:]])

echo "It is Digit"

;;

[[: Lower:]])

echo "It is Lower"

;;

[[: Upper:]])

echo "It is Upper"

;;

*)

echo "It is Unknown"

;;

Esac

Exercise two:

2, write a script, you can accept the options and parameters, and then get each option, and the parameters of the options;

And can be based on options and parameters to make a specific operation. Like Administrators.sh-add Tom,jerry--del Tom,blair

-v|--verbose-h|--help

#!/bin/bash

#program:

#练习接收参数, and get the parameters

#history Donggen 2016-10-27-22:40

Path=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bash

Export PATH

Debug=0

Add=0

Del=0

For I in ' seq 0 $# '; Do

If [$#-gt 0]; Then

Case $ in

-v|--verbose)

Debug=1

shift;

-H|--HELP)

echo "Usage: ' basename $--add user_list--del user_list-v|--verbose-h|--help"

Exit 0

;;

--add)

Add=1

Addusers=$2

Shift 2

;;

--del)

Del=1

Delusers=$2

Shift 2

;;

*)

echo "Usage: ' basename $--add user_list--del user_list-v|--verbose-h|--help"

Exit 7

;;

Esac

Fi

Done

If [$ADD-eq 1]; Then

For the USER in ' echo $ADDUSERS |sed ' [email protected],@ @g '; Do

If ID $USER &>/dev/null; Then

[$DEBUG-eq 1] &&echo "$USER exists."

Else

Useradd $USER

[$DEBUG-eq 1] &&echo "ADD user $USER finished."

Fi

Done

Fi

If [$DEL-eq 1]; Then

For the USER in ' echo $DELUSERS |sed ' [email protected],@ @g '; Do

If ID $USER &>/dev/null; Then

Userdel-r $USER

[$DEBUG-eq 1] &&echo "Delete $USER finished."

Else

[$DEBUG-eq 1] &&echo "$USER not exist."

Fi

Done

Fi

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Linux Command exercise: Case selection Structure Statement exercise