chang IP address ( Urgent ) Post: 22821

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Top Forums UNIX for Dummies Questions & Answers chang IP address ( Urgent ) Post 22821 by RTM on Tuesday 11th of June 2002 09:26:18 AM

06-11-2002

Registered User

Post the Operating System and version you are using - it matters!

For Solaris:
To change the IP address of a network interface on a machine running
Solaris 2.x simply edit the /etc/inet/hosts file and modify the line
corresponding to that network interface. Save your changes and reboot.

In general, this is all that needs to be done for the machine itself
to recognize and start using its new IP address.

However...

If the new IP address is on a different network from the original IP
address, you may need to modify the /etc/inet/netmasks file as well.

There may be additional steps you need to take for other machines to recognize
the new IP address.

If you have an /etc/defaultrouter file listing the default gateway for your
subnet you may need to modify the IP address for the gateway listed in
this file. Similar changes need to be made in files referencing
other subnet specific data if the subnet the machine resides on changed.

If you run a naming service you will need to modify the corresponding
respository on the name server.
i.e. The NIS hosts map, NIS+ hosts table or DNS zone files.

If you have referenced the IP address anywhere else on your machine or other
machines you will need to make the appropriate modifications. Solaris has
been designed such that a machine itself only references its IP address in
/etc/inet/hosts. This allows you to reference a machine using its hostname
rather than the IP address, making IP address changes very simple. A hostname
change requires a bit more work.

For more complex host configuration changes or if you are unsure of yourself
properly completing the above procedure, you can use the `sys-unconfig` command.

These directions can be found at

RTM

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LEARN ABOUT DEBIAN

af_testlock

af_lock(3)						    Attribute Filesystem (AtFS) 						af_lock(3)

NAME

       af_lock, af_unlock, af_testlock - mechanism for reserving update rights in AtFS

SYNOPSIS

       #include <atfs.h>

       Af_user *af_lock (Af_key *aso, Af_user *locker)

       Af_user *af_unlock (Af_key *aso)

       Af_user *af_testlock (Af_key *aso)

DESCRIPTION

       This  manual page describes the interface to the AtFS locking mechanism. Locks are used to avoid conflicting updates to one object history.
       After a user has reserved the update rights, no other user may add new versions to the reserved history.  Reserving the update rights  hap-
       pens  by  locking the most recent version of the history.  As AtFS allows adding new versions to each generation in a history, each genera-
       tion may be locked separately. Reserving update rights for old generations (with generation numbers smaller than the newest generation) are
       performed by locking the most recent version of the corresponding generation.  Removing an ASO (af_rm - manual page af_files(3)) and chang-
       ing an ASO's version number (af_svnum - manual page af_version(3)) also requires a lock on the corresponding ASO.

       af_lock reserves the update permission for the user identified by locker. On  successful  completion,  a  buffer  identical  to	locker	is
       returned, a NULL pointer otherwise.

       af_unlock  cancels  a  formerly established reservation of update rights. Only the owner or the locker of an ASO (identified by the Af_user
       structure that was given to the corresponding call of af_lock) are allowed to do this. On successful completion, af_unlock returns a buffer
       containing the identification of the former locker. This may be empty, if the ASO was not locked.  Upon error, a NULL pointer is returned.

       af_testlock  returns  a	buffer	containing an identification of the current locker of the specified ASO. It returns an empty buffer, if no
       lock is set.

SEE ALSO

       af_version(3), af_files(3)

DIAGNOSTICS

       af_lock and af_unlock return -1 on error and af_errno is set to indicate the error number.

AtFS-1.71						     Fri Jun 25 14:33:11 1993							af_lock(3)