Bash script exercises and bash scripts

Source: Internet
Author: User

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


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


Print "User already exists"


Bash condition judgment

Condition test type:

Integer Test

Character Test

File Test


Conditional test 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.


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