Linux in EnterPrise

Ruby:no such file to load — net/https

edyliu — Tue, 31 Aug 2010 13:10:03 +0000

gem_original_require’: no such file to load — net/https (MissingSourceFile)

If you get this error when getting your app up and running under Ubuntu it means you still need to install the libopenssl-ruby library:

sudo apt-get install libopenssl-ruby

Fetion in Linux world

edyliu — Wed, 25 Aug 2010 09:24:46 +0000

libfetion: I can’t login with mobile phone number now, but can login with fetion id.
openfetion: new project http://sourceforge.net/projects/ofetion/

when I do apt-get update. got some error
“GPG error: http://ppa.launchpad.net lucid Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY FA9C98D5DDA4DB69”

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys FA9C98D5DDA4DB69

Solaris Patching

edyliu — Wed, 11 Aug 2010 04:20:34 +0000

Busy with Solaris patching these days. some servers didn’t reboot/patch for more than 3 years.

Some tips:
1. “ERROR: LSI1030: timeout waiting for interrupt status.
ERROR: LSI1030 MPT Firmware, receive-message: issue-port-enable failed.”

Possible Answers:
1st:
{3} ok setenv auto-boot? false
{3} ok reset-all
{3} ok probe-scsi-all
sc>reset -y

2nd:
sc>poweroff
sc>poweron
simple, right? But i fixed it in the 2nd way.
Possible why I guess, because the harddisk has been replaced. need to re-read by the server ?

3rd:
{3} ok setenv diag-level max
check the POST information.

2. Fix broken meta, due to the harddisk have been replaced rudely.

#check the status.
metastat
…….
d3: Mirror
Submirror 0: d13
State: Needs maintenance
Submirror 1: d23
State: Okay
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 8395200 blocks (4.0 GB)

d13: Submirror of d3
State: Needs maintenance
Invoke: metareplace d3 c1t0d0s3
Size: 8395200 blocks (4.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c1t0d0s3 0 No Maintenance Yes

d23: Submirror of d3
State: Okay
Size: 8395200 blocks (4.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c1t1d0s3 0 No Okay Yes
…….

# Detach the broken one
metadetach -f d3 d13

# Clear the meta data
metaclear d13

# Re-read the configuration, so d13 will be online
metainit -a

# Re-attach it back
metattach d3 d13

# Wait it rsyncing
…….
d3: Mirror
Submirror 0: d13
State: Resyncing
Submirror 1: d23
State: Okay
Resync in progress: 0 % done
Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 8395200 blocks (4.0 GB)

d13: Submirror of d3
State: Resyncing
Size: 8395200 blocks (4.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c1t0d0s3 0 No Okay Yes

d23: Submirror of d3
State: Okay
Size: 8395200 blocks (4.0 GB)
Stripe 0:
Device Start Block Dbase State Reloc Hot Spare
c1t1d0s3 0 No Okay Yes
…….

Ref: http://www.morphosppc.com/article/repair-solaris-svm-metadevices/

Volume group “VolGroup00″ not found

edyliu — Mon, 26 Jul 2010 03:15:18 +0000

Met a problem when try to copy virtualbox vdi file directly from Windows virtualbox to Linux

“Error: Volume group “VolGroup00″ not found
……
Kernel panic – not syncing: Attempted to kill init!”

Solution:
First, boot up in rescue mode, using the CentOS cd, type “linux rescue” on the first boot prompt.

Now chroot to you actual system:
#chroot /mnt/sysimage

Then, backup your initrd:
#cd /boot
#mv initrd-2.6.18-164.el5.img initrd.backup

(use the last version, or the one you are trying to boot, on the “2.6.18-92.el5.img” part)
Now rebuild your initrd:

#mkinitrd /boot/initrd-2.6.18-164.el5.img 2.6.18-164.el5
(Same thing about the versions)

#reboot

Play with Grub2

edyliu — Sat, 17 Jul 2010 03:27:00 +0000

Grub maybe a headache to old grub users, I updated my Laptop with New version,
really took some time to get familiar with grub2. Here is a good article
Cool Links for Grub2

http://www.howtogeek.com/howto/17787/clean-up-the-new-ubuntu-grub2-boot-menu/

contain holes – can’t swap on it.

edyliu — Tue, 08 Jun 2010 04:16:05 +0000

root@home# mkfile 512m /var/swapfile
root@home# swap -a /var/swapfile
“/var/swapfile” may contain holes – can’t swap on it.

the above is ok for UFS, but not work in ZFS.

Solution:
root@home# zfs create -V 1gb rpool/swapfile
root@home# swap -a /dev/zvol/dsk/rpool/swapfile

Good articles on Swap

http://blogs.sun.com/jimlaurent/entry/solaris_faq_myths_and_facts

mount: /mnt/nfs: Not owner

edyliu — Sat, 29 May 2010 00:34:33 +0000

nfs mount: mount: /mnt/nfs: Not owner

When you get this error from a Solaris Host, because you are trying to mount an nfsV3 share with an nfsV4 client.

This occurs when you want to share an nfs from a linux host to a solaris host.

Just use the option vers=3 to avoid this problem or configure nfsV4 on the linux host.

mount -o vers=3 linux_nfs_01:/htdocs /htdocs

Alfresco installation Guides

edyliu — Thu, 20 May 2010 12:27:42 +0000

Alfresco offers true Open Source Enterprise Content Management (ECM) – Document Management, Collaboration, Records Management, Knowledge Management, Web Content Management and Imaging.

Installation guides with snapshots, clear to follow

http://www.linuxdict.com/books/Alfresco.pdf

PS: The Alfresco installer also support console, so we can install minimal system. and install the Alfresco. no X is needed.
Details: http://wiki.alfresco.com/wiki/Main_Page

How to enable apache modules in Debian/Ubuntu-likes

edyliu — Sun, 16 May 2010 02:19:22 +0000

Simple:
sudo a2enmode rewrite

Where is nagstamon configuration?

edyliu — Sat, 08 May 2010 02:08:53 +0000

My nagstamon crashed sometimes and the configuration lost.

but can’t find where the hell configuration is. so got the solution: define the configuration manually.

Everything should get at its place and you can start it from Start menu/Programs/nagstamon. When run from command line with “nagstamon” you can pass a configfile like “nagstamon configfile” in case you want to store it at another place than default. It starts automatically at login. Details: http://nagstamon.sourceforge.net/setup/

Now my shortcut looks like: “C:\Program Files\nagstamon\nagstamon.exe” nagconfig.conf
The configuration lays in C:\Program Files\nagstamon\nagconfig.conf , good news it also encryto the password. cool