ifup

Additional Notes

ifup is a network command used to bring a network interface up. It is used to re-enable interfaces after maintenance or to apply configuration changes from /etc/network/interfaces.

ifup and ifdown are part of the ifupdown package on Debian-based systems. Other distributions may use NetworkManager or netplan instead.

Syntax

ifup [options] interface

Parameters

• options: Flags that change how ifup behaves.
• interface: Network interface to bring up (e.g., eth0).

Common Options

• --help: Show command help when supported.
• --version: Show version information when supported.

Examples

ifup --help
man ifup

Practical Notes

Options can vary by distribution and package version. Use man ifup, ifup --help, or the package documentation for exact syntax.