Linux command: Automatically add user

1. Automatically add 10 User:

#adminuser. Sh

#!/bin/bash

#

if [= = '--add ']; Then

Fori in {1..10}; Do

If ID user$i &>/dev/null; Then

echo "user$i exists."

Else

Useradd user$i

echo user$i | passwd--stdin &>/dev/null

echo "Add user$i finished."

Fi

Done

elif [= = '--del ']; Then

Fori in {1..10}; Do

If ID user$i &>/dev/null; Then

Userdel-r user$i

echo "Delete User$i finished."

Else

echo "No user$i."

Fi

Done

Else

echo "is a Unknown ARG"

Exit8

Fi

2. Auto-Add User: adminuser2.sh--add USER1,... | --del User1,user2,... | --help

# VI adminuser2.sh

#!/bin/bash

If [$#-lt 1]; Then

echo "Usage:adminuser2.sh--add USER1,... |--del user1,user2 |--help"

Exit7

Fi

if [= = '--add ']; Then

Fori in ' Echo | sed ' s/,//g '; Do

Ifid $I &>/dev/null; Then

echo "$I exists."

Else

Useradd $I

echo $I | passwd--stdin $I &>/dev/null

echo "Add $I finished."

Fi

Done

elif [ = =--del]; Then

Fori in ' Echo | Sed ' s/,//g '; Do

Ifid $I &>/dev/null; Then

Userdel-r $I

echo "Delete $I finished."

Else

echo "$I not exist."

Fi

Done

elif [= =--help]; Then

echo "Usage:adminuser2.sh--add USER1,... | --del User1,user2 | --help "

Else

echo "unkown options."

Fi

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Linux command: Automatically add user