열혈남아님의 이글루

this script on both nodes to see what the WWN of each LUN is.

열혈남아 — Fri, 13 Feb 2009 23:32:45 GMT

This script to see what the WWN of each LUN is.

for i in `ls -d /sys/block/sd*`; do J=`echo $i | cut -f4 -d "/"`; \
echo "$J = `scsi_id -g -u -s /block/$J`"; done

힘에 부치는 하루

열혈남아 — Sun, 08 Feb 2009 09:30:28 GMT

오늘하루 바쁘고 짜증나고 힘드네.
어디론가 도망가고 싶다.

rpm sorting

열혈남아 — Mon, 05 Jan 2009 23:33:09 GMT

Normal session
rpm -qa --qf "%{name}-%{version}-%{release}-%{arch}\n" | sort > rpm-qa

Rescue mode
rpm -qa --qf "%{name}-%{version}-%{release}-%{arch}\n" --root=/mnt/sysimage | sort > rpm-qa

tag : rpm, sort

rpm -ivh --replacefiles kernel

열혈남아 — Tue, 30 Sep 2008 22:50:57 GMT

다른 모듈 인스톨 됬을때 원래꺼로 다시 바꿀때 사용

rpm -ivh --replacefiles kernel-PAE-2.6.18-53.el5.i686.rpm

Channel Family in RHN Satellite

열혈남아 — Wed, 24 Sep 2008 07:13:51 GMT

***Channel Family***
--------
When you create a clone/custom channel at that moment a new family is created and the name of the family is taken from the owner of the activated satellite certificate,so, when at the moment when initially you created ur own custom channels at that moment the owner of the sat cert was "Red Hat Internal Test Cert". So it took this as the channel family name and under this all clone / custom channel are present
--------

You cannot remove the channel family, you can rename it.

# su - oracle
# sqlplus rhnsat/rhnsat@rhnsat
SQL> select ID,NAME from rhnChannelFamily where NAME='Old Family Name';
The above command is to verify that the channel name exists and isunique
SQL> update rhnChannelFamily set NAME='SHPS' where NAME='New Family Name';
SQL> COMMIT;
SQL> update rhnChannelFamily set NAME='NEw Name' where NAME='Old Family Name';

tag : rhn, Satellite

편도선이 자주 붇는다...

열혈남아 — Mon, 22 Sep 2008 14:43:03 GMT

오늘도 고객이랑 한 5시간 통화한거 같다..
무슨 말길을 못알아 듯냐 ㅡㅡ
넘 말해서 목이 아프다..
이놈의 직장 1년만 더다니면 후두암 걸리겠다..
딴곳으로 옮겨야지..
더 이상 있을만한 이유를 못찾겠다 ㅡㅡ

memtest86

열혈남아 — Wed, 27 Aug 2008 01:22:22 GMT

1. Please contact hardware vedor and get dignostic tool and run.
2. please download memtest86.iso and burn to CD and test memory.
http://www.memtest.org/
http://www.memtest.org/#downiso

tag : memtest

RHN Satellite Upgrade Procedure

열혈남아 — Mon, 25 Aug 2008 22:28:27 GMT

Note: Procedure in increasing the filesystem size of / and /rhnsat of

satellite.gsslab.bne.redhat.com



1. Reserved pe2950-1.gsslab.bne.redhat.com

http://inventory.gsslab.rdu.redhat.com/



2. Create virtual disk and assign it to pe2950-1 

http://storage-1.gsslab.bne.redhat.com



3. Setup pe2950-1 to properly detect and access the exported LUN.  Mount

LUN to a mount point.



mkdir /mnt/satellite

fdisk /dev/sdX

mkfs -t ext3 /dev/sdXY

mount /dev/sdXY /mnt/satellite



4. Export the mounted LUN via NFS from pe2950-1 so

satellite.gsslab.bne.redhat.com can access it

/etc/exports

/mnt/satellte *(rw,no_root_squash)

service nfs restart



5. Mount the NFS filesystem exported by pe2950-1

mount -t nfs pe2950-1.gsslab.bne.redhat.com:/mnt/satellite

/mnt/satellite



6. Run rhn-satellite-exporter to backup all the RHN Satellite software

channels towards the NFS filesystem

rhn-satellite-exporter -c ... -c .... --dir=/mnt/satellite/



7. Stop the RHN Satellite service:

service rhn-satellite stop



8. Unmount the /var/satellite filesystem:

umount /var/satellite



9. check the file system

e2fsck -f /dev/VolGroup00/LogVol03



10. Shrink the ext3 filesystem from 806GB to 700GB:

resize2fs /dev/VolGroup00/LogVol03 700G



11. Resize the volume group:

lvreduce -L -106G /dev/VolGroup00/LogVol03



12. Do a filesystem check on it:

fsck /dev/VolGroup00/LogVol03



13. Mount the filesystem:

mount -t ext3 /dev/VolGroup00/LogVol03 /var/satellite



14. Start RHN Satellite to test:

service rhn-satellite start



15. Once working, stop the satellite to go grow /rhnsat filesystem:

service rhn-satellite stop



16. Unmount /rhnsat filesystem:

umount /rhnsat



17. Increase the logical volume LogVol02:

lvextend -L +76G /dev/VolGroup00/LogVol02



18. check the file system

e2fsck -f /dev/VolGroup00/LogVol03



19. Enlarge the ext3 filesystem of LogVol02:

resize2fs /dev/VolGroup00/LogVol02



20. Do a filesystem check on it:

fsck /dev/VolGroup00/LogVol02



21. Mount the filesystem:

mount -t ext3 /dev/VolGroup00/LogVol02 /rhnsat



22. Start RHN Satellite and do some testing:

service rhn-satellite start



23. Increase the logical volume LogVol01 (/ partition):

lvextend -L +30G /dev/VolGroup00/LogVol01



24. Enlarge the mounted LogVol01 filesystem:

ext2online /dev/VolGroup00/LogVol01

tag : shrink, resize2fs, lvextend, ext2online, rhel4

tune2fs

열혈남아 — Fri, 22 Aug 2008 03:11:26 GMT

To remove the journal:
# tune2fs -O ^has_journal /dev/sda1

To add a journal:
# tune2fs -j /dev/sda1

tag : tune2fs

Change grub boot menu

열혈남아 — Thu, 21 Aug 2008 22:54:02 GMT

*Procedure

1. At the GRUB boot screen, select the kernel entry you want to change and press 'e' to edit the entry
2. Select the kernel line with the arrow keys. An example kernel line from GRUB:

kernel /vmlinuz-2.6.9-67.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet

3. Press 'e' to edit the entry and add the option to the end of the line. For example, to add the "noapic" option:

kernel /vmlinuz-2.6.9-67.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet noapic

4. Press ENTER to save the change.
5. Press 'b' to boot.

After boot, the time is ok, please modify /etc/grub.conf

tag : grub