How to list network interfaces in Solaris10

March 29, 2010

If you have a Solaris box with few NIC cards configured. You can list them as follows:

# ifconfig -a

ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
vsw0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 172.168.2.71 netmask ffffff00 broadcast 172.168.2.255
ether 0:14:4f:fa:95:15

And you’d get the output as shown above. So this is reflecting on localhost and one virtual switch vsw0. But what about other NIC cards? You can list all of the network cards at once using the following command:

ifconfig -a plumb

ifconfig -a

This will list all the network devices available on the Solaris Box. So even if you have a freshly installed Solaris machine with no interface configured, you can use the above command to list the network cards and then proceed with configuring them.


Mount cdrom manually in Solaris

March 18, 2010

It actually happens a number of times that although you’ve inserted the disc in a sparc machine but still it refuses to mount the disk. One of the workaround is to restart the vold and vomgt daemons. But even the if you don’t see your cdrom mounted, you can do it manually as mentioned below:

First find the cdrom, i.e. we need to know the x in cxtxdx.

Fire the following command to find the actual path of cdrom:

ls -al /dev/sr*

This would look like something as follows:

bash-3.00# ls -al /dev/sr*
lrwxrwxrwx   1 root     root          12 Mar  8 14:14 /dev/sr0 -> dsk/c1t0d0s2

So here my cdrom is /dev/dsk/c1t0d0sx

We’re not yet sure about the slice no. so I’ve mentioned sx in above line.

Now we’ll ltry to mount the above slice manually:

mount -F hsfs /dev/dsk/c0t1d0s2 /mnt/cdrom

hsfs mount: /dev/dsk/c1t0d0s1 is not an hsfs file system.

If this fails then we can try for another slice:

mount -F hsfs /dev/dsk/c1t0d0s0 /mnt/cdrom

And it works this time, meaning our cdrom was at s0 slice.


Package Mangement in Solaris

November 22, 2009

Here are the list of useful commands frequently used during package management.

pkgadd

Adds software packages to the system

pkgrm

Removes software packages from the system

pkginfo

Displays software package information

pkgchk

Checks the accuracy of a software package installation

So, we’ll take an example to use above commands. I’ve a package called SUNWant.Z, which I want to install.

So I use the following syntax to add a package.

pkgadd -d SUNWant.Z

To check whether your package has been installed, you can use pkginfo and grep the output to find a specific package.

pkginfo | grep SUNWant

To check the accuracy of the package, you can use pkgchk command as:

pkgchk SUNWant

To remove above package, we have the pkgrm command to use:

pkgrm SUNWant

Refer the Sun documentation for further details.


Solaris Run Levels

November 12, 2009

The run levels in Solaris are little different than what you know about run levels in Linux. So, if you come from Linux background this could be little confusing initially.

There are total 8 run levels in Solaris. Default run level is 3. At a given point of time, a system can be in only one run level.

0    Power Down State
To shut down the operating system so that it is safe to turn off power to the system. This will bring the machine to Open Boot Prompt (OK)

s or S    Single User State
To run as a single user with some file systems mounted and accessible.

1     Administrative State
To access all available file systems. User logins are disabled.

2    Multiuser State
For normal operations. Multiple users can access the system and all file system. All daemons are running except for the NFS server daemons.

3    Multiuser level with NFS resources shared
For normal operations with NFS resources shared. This is the default run level for the Solaris environment.

4    Alternative multiuser state
Currently unavailable.

5    Power-down state
To shut down the operating system so that it is safe to turn off power to the system. If possible, automatically turns off power on systems that support this feature.

6    Reboot state
To shut down the system to run level 0, and then reboot to multiuser level with NFS resources shared (or whatever level is the default in the inittab file).


How to create a Solaris Flash Archive (Flar)

October 22, 2009

A solaris filesystem can be copied into an flash archive. This archive can then be used to install the Solaris OS on another system. Installation through flar is fast and efficient.

The format of the command is as follows:

# flarcreate -n name options path/filename

name
The name that you give the archive.

options
For a description of options, see The flar Command.

path
The path to the directory in which you want to save the archive file. If you do not specify a path, flarcreate saves the archive file in the current directory.

filename
The name of the archive file.

So for example I wan to create a flar with the name Solaris9 and the filename as myarchive.flar, the command will look like as mentioned below:

# flarcreate -n solaris9 -c myarchive.flar

where -c is an option to create compressed flar.

See the manpages for more options.


How to configure telnet to login as root

September 23, 2009

By default, telnet is enabled to be access by remote logins for a non-root user. To allow a root user to access the telnet remotely you will have to explicitly allow it.

This can be done by commenting the following line in the file /etc/default/login:

# CONSOLE=/dev/console

But please understand the security threat behind this, first telnet is insecure and hence is not suggested method of remote access, instead use SSH. Besides allowing remote login for root via telnet is a big NO NO.

You’ve been warned!


Solaris 10 versions

September 21, 2009

Often the Solaris 10 versions are referred by two ways. Either by the date on which they were released or the update no. So the latest release of Solaris10 is U8 released in Oct-2009 (10/09).

But what about the rest?
Given below is a simple table mentioning the release date and its corresponding update no:

Update Release
1 01/06
2 06/06
3 11/06
4 08/07
5 05/08
6 10/08
7 05/09
8 10/09