How to obtain permissions in linux if the permissions are not enough

In Linux systems, if the permissions are insufficient, you can obtain it through the following methods: use the sudo command to run the command with administrator privileges, such as: sudo cat секретные_файлы.txt. Use the su command to switch to the root user, such as: su. Use the chmod command to change file or directory permissions, such as: chmod 777 my_file.txt. Use the chown command to change the file or directory owner, such as: chown john my_file.txt. Use the usermod command to add users to the group, such as: usermod -a -G admins john.

Linux How to obtain permissions when the permissions are insufficient

In the Linux system, files and directories are restricted by permissions. To prevent unauthorized users from accessing or modifying them. If you encounter insufficient permissions, there are several methods to obtain the required permissions:

1. Use the sudo command

The sudo command allows ordinary users to Run the command with administrator privileges. To use sudo, precede the command with sudo. For example:

sudo cat секретные_файлы.txt

2. Using the su command

The su command allows you to switch to another user's account. To switch to the root user, run:

su

and enter the root password.

3. Change the permissions of a file or directory

You can use the chmod command to change the permissions of a file or directory. For example, to change the permissions of the file my_file.txt to 777 (readable, writable, and executable by all users), run:

chmod 777 my_file.txt

4. Change the owner of a file or directory

You can use the chown command to change the owner of a file or directory. For example, to change the owner of the file my_file.txt to user john, run:

chown john my_file.txt

5. Add user to group

You can use the usermod command to User added to group. For example, to add user john to the group admins, run:

usermod -a -G admins john

This will grant user john permissions for the group.

Note:

• Please be careful when obtaining permissions, as granting too many permissions may cause security issues.
• When using sudo, remember to enter your user password.
• Before changing the permissions or owner of a file or directory, make sure you have permission to do so.

The above is the detailed content of How to obtain permissions in linux if the permissions are not enough. For more information, please follow other related articles on the PHP Chinese website!