What are common user management tasks?

Common user management tasks in Linux include:

Creating User Accounts: Adding new users to the system using the useradd command.
```
sudo useradd username
```
Modifying User Accounts: Changing user attributes such as username, home directory, or group memberships using the usermod command.
```
sudo usermod -d /new/home/directory username
```
Deleting User Accounts: Removing user accounts from the system with the userdel command.
```
sudo userdel username
```
Changing Passwords: Updating user passwords using the passwd command.
```
sudo passwd username
```
Managing User Groups: Creating, modifying, or deleting groups and adding users to groups using groupadd, groupmod, and groupdel.
```
sudo groupadd groupname
sudo usermod -aG groupname username
```
Setting Account Expiration: Configuring when user accounts expire using the chage command.
```
sudo chage -E YYYY-MM-DD username
```
Viewing User Information: Checking user details and group memberships with commands like id, groups, and examining /etc/passwd.
```
id username
```

Locking and Unlocking Accounts: Disabling user accounts with usermod or passwd.

sudo usermod -L username  # Lock account
sudo usermod -U username  # Unlock account

Monitoring User Activity: Using commands like who, w, and last to track user logins and activity.
```
who
```

These tasks are essential for maintaining user accounts, ensuring security, and managing access control in a Linux environment.