ifup & ifdown

Question 1

ifup

Answer 1

The ifup and ifdown commands may be used to configure (or, respectively, deconfigure) network interfaces based on interface definitions in the file /etc/network/interfaces.

Question 2

ifup

-a, –all, Process all interfaces marked auto.

–allow CLASS, Ignorenon-“allow-CLASS” interfaces.

-i, –interfaces FILE, Use FILE for interface definitions.

–state-dir DIR, Use DIR to store state information.

• X, –exclude PATTERN, Exclude interfaces by PATTERN.
• n, –no-act, Print what would happen but don’t do it.

Answer 2

• v, –verbose
• o, OPTION=VALUE, Set OPTION to VALUE as though it were in /etc/network/interfaces.

–no-mappings, Don’t run any mappings.

–no-scripts, Don’t run any hook scripts.

–no-loopback, Don’t act specially on the loopback devices.

–force, Force de/configuration.

–ignore-errors

Question 3

ifdown

Answer 3

The ifup and ifdown commands may be used to configure (or, respectively, deconfigure) network interfaces based on interface definitions in the file /etc/network/interfaces.

Question 4

ifdown

-a, –all, Process all interfaces marked auto.

–allow CLASS, Ignorenon-“allow-CLASS” interfaces.

-i, –interfaces FILE, Use FILE for interface definitions.

–state-dir DIR, Use DIR to store state information.

• X, –exclude PATTERN, Exclude interfaces by PATTERN.
• n, –no-act, Print what would happen but don’t do it.

Answer 4

• v, –verbose
• o, OPTION=VALUE, Set OPTION to VALUE as though it were in /etc/network/interfaces.

–no-mappings, Don’t run any mappings.

–no-scripts, Don’t run any hook scripts.

–no-loopback, Don’t act specially on the loopback devices.

–force, Force de/configuration.

–ignore-errors