capget - Linux
Overview
The capget
command retrieves the effective capabilities of a specified process or user. It is a versatile tool for examining capability configurations in Linux systems.
Syntax
capget [options] <pid>
capget [options] <user>
Options/Flags
-c
: Display capabilities in a human-readable format instead of numeric.-e
: Retrieve capabilities for the invoking process or user if no target is specified.-v
: Verbose mode for additional information about retrieved capabilities.
Examples
Get capabilities of a PID:
capget 1234
Get capabilities of a user:
capget -c alice
Determine if a process has a specific capability:
capget -v -c 1234 | grep CAP_NET_ADMIN
Common Issues
- Permission denied: Ensure you have sufficient privileges (e.g., root user) to retrieve capabilities.
- No running process: Specify a valid PID when targeting a process.
- User not found: Verify the existence of the user specified as a target.
Integration
- Use
capget
withsetcap
to modify capabilities of a file or process. - Integrate
capget
into shell scripts to automate capability management tasks.
Related Commands
setcap
: Modify the capabilities of a file or process.cap_mkremap
: Create a new capability mapping.- Kernel Capabilities: Official Linux kernel documentation on capabilities.