Bash script exercises and bash scripts

Bash script exercises and bash scripts

Exercise 1:

1. Add five users, user1,..., user5;

2. The password of each user is the same as the user name. After the password is added, the command execution result is not displayed;

3. After each user is added, it must be displayed that the user has been added successfully.

Useradd user1

Echo "user1" | passwd -- stdin user1 &>/dev/null

Echo "User1 added ."

 

Condition judgment

If

The user does not exist. Add the user, add the password, and print that user1 is successfully added;

Otherwise

Print "User already exists"

 

Bash condition judgment

Condition test type:

Integer Test

Character Test

File Test

 

Conditional test expression:

[Expression]

[[Expression]

Test expression

 

 

Exercise 2:

1. Use a variable to save a user name;

2. Delete the users in this variable and delete their home directories;

3. The "User deleted" information is displayed.