Category: Operating System

Solaris Kernel Patching Recommended Patch

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Here’s another Kernel patching of Solaris. I know there are tons of this type of post in the internet but another reference for the one who needs it, is I guess ok.

To be honest, this is the steps that really made me understood the steps and procedure and the concept behind the 10_Recommended patch for solaris kernel.

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KSH Script Basics | Special Shell Variables

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Just deleted tons of stale, unsused user accounts. Here are some KSH shell basics and special shell variable. I need to Google them up myself to get reminded that ‘$?’ is the output variable for script execution. That is, it’s 0 for successful execution and 1 if there is any error.

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getfacl and setfacl – Unix Access Control (acl) Tool

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Today’s topic is all about Access List… For Unix and Unix-like system, the usual command to set the file permission is the ‘chmod’ command. However there are instances that we need more flexibility in giving access and control for files and folders. Get it? Access and Control? In this situation, there is a file utility built in Unix called ‘getfacl‘ and ‘setfacl‘.


getfacl is a file utility for viewing the access control list information associated with a file or directory.

For a memory aid, you can think of ‘getfacl’ as “Get File ACL“.. ACL being Access Control List.

Access control lists are extended attributes added to most major file systems in the 2.6 kernel to improve ability to control the access of files. They allow permissions to be set for individual groups and users and not just the owning user, owning group, and all other users.

setfacl is a command that allows you to set the Access Control List information for a file or directory.

Access control lists are extended attributes added to most major file systems in the 2.6 kernel to improve ability to control the access of files. They allow permissions to be set for individual groups and users and not just the owning user, owning group, and all other users.

You can read man pages for both getfacl and setfacl for more information.

getfacl and setfacl example….

Here’s an example of using the basic funtion of getfacl and setfacl

# getfacl

#setfacl

setfacl -m default:user::rwx,default:group::r-x,default:other:r-x,default:mask:rwx /u06/OneSource/datapump_dbdump

setfacl -m default:user:rcodapp1:r-x,default:group:r-x,default:other:—,default:mas:rwx /u06/OneSouce/datapump_dbdump

Unlock locked user account in HP-UX

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I know nothing about HP UX (yeah, except SAM). That’s why, just now, when there’s a request to just make a trace route from an HPUX server to another server, I have to login and do execute the command. I couldn’t log in as my user id so i logged in as root instead from the console.

I check grep’d my account the walah! It was there! I reset the password, open an ssh terminal and tried to login. unsuccessful, that’s why i knew then that it is locked.

Here’s how to unlock a locked user account in HP UX in command line.

In HP-UX 11.xx if user account is locked, you can unlock the account by running SAM. But running SAM takes some time usually 2-3 minutes on heavily loaded HP-UX servers. You can unlock the locked user account from command line by running following command:

1. Login as root or use sudo from your account, if there is no sudo installed just use su – root :

$sudo su –

*******

2. Run this command to unlock the locked HP-UX user account:

#/usr/lbin/modprpw –l –k johnm

Running modprpw will unlock the locked user account in HP-UX from command line.without running SAM

NOTE: modprpw is HP-UX command only and wouldn’t work in Solaris,AIX and any Linux servers

That info was ‘borrowed’ from here…. thanks!

Send Break on SPARC Enterprise T5120 – Send Break on ILOM

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Send Break on SPARC Enterprise T5120 – well it for the T5000 series I guess, the newer ones. Or “Sending Break onan ILOM..

“->” = ILOM
“sc>” = ALOM

.. and since this particular server has the “->” prompt we’re using the ILOM.

From ILOM to Solaris:
-> start /SP/console

From ALOM to Solaris:
sc> console

And of course.. Enter “#.” to return to ALOM / ILOM !!

Send Break on ILOM

set /HOST send_break_action=break
and then
start /SP/console

c)ontinue, s)ync, r)eset? s

bada bing! bada boom!

Building ZFS Mirrored File System Example

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I’ve writted something about the Zeta file system before… It’s like some sort of an intro to the filesystem.

This post will be the first of series of post in configuring ZFS on a test machine, a Sun-Fire-V240 running Solaris 10.

# uname -a
SunOS sedm3205 5.10 Generic_137111-04 sun4u sparc SUNW,Sun-Fire-V240

Anyhow, first topic will be how to create/build, test, destroy and recreate a mirrored ZFS disk (or file based). Most of the ZFS commands we’ll be using are:

  • zpool
  • zcreate

That’s it!

Creating the ZFS Mirror

We’ll create two kinds of mirrored partition, one is file based and the other was is physical 175GB disk.

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Watch-Net and Watch-Net-All Diagnostics

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This is the first post regarding the On-site training to make MNL SAs up to speed to support the company’s production servers.

This week’s topic… building the server through Jumpstarting (yeah, solaris sparc servers).

Watch-Net and Watch-Net-All Diagnostics

The watch-net and watch-net-all diagnostics monitor Ethernet packets on the Ethernet interfaces connected to the system. Good packets received by the system are indicated by a period (.). Errors such as the framing error and the cyclic redundancy check (CRC) error are indicated with an “X” and an associated error description. The watch-net diagnostic is initialized by typing the watch-net command at the ok prompt and the watch-net-all diagnostic is initialized by typing the watch-net-all command at the ok prompt. The following code example identifies the watch-net diagnostic output message. Example 4-3 identifies the watch-net-all diagnostic output message.

ok watch-net
Hme register test --- succeeded.
Internal loopback test -- succeeded.
Transceiver check  -- Using Onboard Transceiver - Link Up.
passed
Using Onboard Transceiver - Link Up.
Looking for Ethernet Packets.
'.' is a Good Packet.  'X' is
a Bad Packet.
Type any key to stop.
..................................................
................................................................
................................................................
........................................................

ok watch-net-all
/pci@1f,0/pci@1,1/network@1,1
Hme register test --- succeeded.
Internal loopback test -- succeeded.
Transceiver check  -- Using Onboard Transceiver - Link Up.
passed
Using Onboard Transceiver - Link Up.
Looking for Ethernet Packets.
'.' is a Good Packet.  'X' is
a Bad Packet.
Type any key to stop.
........
................................................................
................................................................
................................................................
....................................
ok
ok

Configure Virtual Hosting in Apache Web Server

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When we say or mention the word Web Server, the first thing that comes to our mind is Apache, right? (if you don’t then what are you doing here reading this? :-) )

Apache is the most well known open source web server there is! Open source?? Make that the most wildly used webserver on the internet, period!

It is believed (and i know they made a survey or study about it) that Apache takes 90% of all web servers in the internet. Most web hosting company, and I’ve once worked in one, use Apache.

This post will talk about how to setup Apache for Virtual Hosting

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All About Arlo Gilbert

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Who in heaven is Arlo Gilbert? Yep, using ‘heaven’ is perfect for describing this man for he do sometimes tries to conquer heaven. He’s into planes you see. :)

Anyway, you’re probably Googling about Arlo Gilbert as you read this post. Well, let me save you a few minutes and introduce you to Mr. Gilbert in one fast minute.

He is the following:

  • The Man is from Austin, Texas
  • Arlo Gilbert is a high school drop out… and a proud one (don’t do that boys and girls)
  • A family man! So there’s a Mrs. Gilbert and two little Arlo Gilberts (daughters)

The reason why we feature this brilliant man is that he has successfully launched online startups and been doing it for 10 years now. Remember, high school dropout and no training in marketing or any business related studies… Brilliant indeed.

What caught my attention while reading his ‘About’ page was his current project – the iCall. It’s a VOIP startup company. I was wondering if iCall was developed by Arlo Gilbert or if it uses Asterisk?

.

.

.

Tekken Philippines

vi Search and Replace… The Basics, Dummy’s Reference

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Yep, this is a dummy’s reference… I keep on forgetting the syntax so I might as well put it here for my own reference… :D

vi is the one, if not the most popular text editor available for a System Administrator on a UNIX and UNIX-like machines.

It has two modes, command and editor mode.

Here are some syntax in using the Search and Replace in ‘vi’.

Search:

The most basic and most easily remembered command for searching is vi is slash or ‘/’ followed by the character being searched. That’s for forward searching. For backward, vi use ‘?’ followed by the string being searched.

To go to the next occurrance of the string being searched, vi use ‘n’ command. Doesn’t matter if your searching forward (from up, down) or backward, from down to top.

Example:

(you have to be in command mode… press ESC first)

/search_string

?search_string

Search and Replace

For search and replace, use the syntax

:%s/original/replaced/g

Make sense?
Any command that begins with a “:” is called a line mode command and performs its duty on the line the cursor is currently on.

The above syntax serves my purpose now… If I want to replace text in certain ranges.. syntax can be found here