Tuesday, March 23, 2010
Friday, March 5, 2010
REDHAT: To Test New Kernel Reboot Once
We want to change default=0 to default=1 This will boot your old kernel (not the upgraded one). Grub starts at 0, which will be your new kernel. We will switch to the new kernel later.
Save and exit.
Step 3: Configure server to boot once with the new kernel.
Now we will configure the server to boot the new kernel only once in case it fails. This is the most important step, if its not done and the new kernel fails your out of luck.
Type the following from command line (one at a time):
grub
savedefault --default=0 --once
quit
Step 4 – Reboot
Then reboot the server or computer. When it comes back up run uname -a to make sure it has the new kernel. (Note: if it does not come back up, reboot it again and it will load the old kernel.)
Then switch the grub.conf to boot the new kernel permanently.
nano /boot/grub/grub.conf
change default=1 to default=0
Save and exit. Thats it you have successfully updated your kernel.
Save and exit.
Step 3: Configure server to boot once with the new kernel.
Now we will configure the server to boot the new kernel only once in case it fails. This is the most important step, if its not done and the new kernel fails your out of luck.
Type the following from command line (one at a time):
grub
savedefault --default=0 --once
quit
Step 4 – Reboot
Then reboot the server or computer. When it comes back up run uname -a to make sure it has the new kernel. (Note: if it does not come back up, reboot it again and it will load the old kernel.)
Then switch the grub.conf to boot the new kernel permanently.
nano /boot/grub/grub.conf
change default=1 to default=0
Save and exit. Thats it you have successfully updated your kernel.
Tuesday, February 9, 2010
Solaris:How can I use the Solaris ?Explorer? program to collect information on my zone(s)
Explorer 5.0 can be run on Solaris 10 in a global zone. It can be used to collect information on containers (non-global zones) with the -w option.
Solaris: How do I modify the network configuration of a running zone?
global# ifconfig bge0 addif 192.168.200.2 zone myzone
global# ifconfig bge0 removeif 192.168.200.2
Or remove and add again interface via zonecfg -z myzone
Thursday, July 30, 2009
Solaris 10 zones fatal signal 9
If your zones trying to boot endlessly looping like this....
Jul 29 13:05:52 global zone last message repeated 158764 times
Jul 29 13:05:52 global zone genunix: [ID 729207 kern.warning] WARNING: init(1M) for zone localzone (pid 1800) exited on fatal signal 9: restarting automatically
Jul 29 13:11:47 global zone last message repeated 140032 times
Jul 29 13:11:52 global zone genunix: [ID 729207 kern.warning] WARNING: init(1M) for zone localzone (pid 24509) exited on fatal signal 9: restarting automatically
Jul 29 13:12:32 global zone last message repeated 15167 times
Jul 29 13:12:32 global zone genunix: [ID 729207 kern.warning] WARNING: init(1M) for zone localzone (pid 24509) exited on fatal signal 9: restarting automatically
Your library libc.so.1 might be in trouble. Try copy from global zone. and it will able to boot again.
root@globalzone # /zones/localzone/root/liblibc.so.1
-rwxr-xr-x 1 root bin 0 Jul 29 09:44 libc.so.1
see the zlogin console, localzone is booting...
Jul 29 13:05:52 global zone last message repeated 158764 times
Jul 29 13:05:52 global zone genunix: [ID 729207 kern.warning] WARNING: init(1M) for zone localzone (pid 1800) exited on fatal signal 9: restarting automatically
Jul 29 13:11:47 global zone last message repeated 140032 times
Jul 29 13:11:52 global zone genunix: [ID 729207 kern.warning] WARNING: init(1M) for zone localzone (pid 24509) exited on fatal signal 9: restarting automatically
Jul 29 13:12:32 global zone last message repeated 15167 times
Jul 29 13:12:32 global zone genunix: [ID 729207 kern.warning] WARNING: init(1M) for zone localzone (pid 24509) exited on fatal signal 9: restarting automatically
Your library libc.so.1 might be in trouble. Try copy from global zone. and it will able to boot again.
root@globalzone # /zones/localzone/root/liblibc.so.1
-rwxr-xr-x 1 root bin 0 Jul 29 09:44 libc.so.1
see the zlogin console, localzone is booting...
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