How do I remove permissions?

To remove permissions from a file in Unix-like operating systems, you can use the chmod command with the - option. Here's how it works:

Syntax

chmod -[permissions] [file]

Example

1. Remove Execute Permission: To remove the execute permission for the user (owner) on a file named system_monitor.sh, you would use:

   chmod -x system_monitor.sh

2. Remove Read Permission: To remove read permission for the group, you would use:

   chmod g-r system_monitor.sh

3. Remove Write Permission: To remove write permission for others, you would use:

   chmod o-w system_monitor.sh

Permission Categories

• u: User (owner)
• g: Group
• o: Others

Combining Permissions

You can combine multiple permission changes in a single command. For example, to remove both read and write permissions for others:

chmod o-rw system_monitor.sh

Checking Permissions

After modifying permissions, you can check the current permissions of the file using:

ls -l system_monitor.sh

This will display the permissions in a format like -rwxr-xr--, where you can see the changes you've made.

If you have any further questions or need more examples, feel free to ask!