Execute the below command to create the new logical volume “netcoolvol01” from “systemvg” Volume group. Please use “vgs” & “lvs” command to know the free space in a volume group
===========================================
lvcreate -L10000 -n netcoolvol01 systemvg
Execute the below command to format the new file system
===========================================
mkfs -t ext3 /dev/mapper/systemvg-netcoolvol01
Mount the new file system
============================================
mount /dev/mapper/systemvg-netcoolvol01 /mnt
[root@dbserver /]# df –h /mnt
/dev/mapper/systemvg-netcoolvol01 9.7G 55M 9.1G 1% /mnt
[root@dbserver /]#
Monday, December 27, 2010
How to extend a Logical volume in Linux (LVM)
Execute the lvextend and resize2fs commands to increase the size of a logical volume. Some Linux version we need to use ext2online command instead of resize2fs
lvextend -L +G
resize2fs
ext2online
Eg:
dbserver:/etc # lvextend -L +2G /dev/mapper/sysvg-var
Extending logical volume var to 5.00 GB
Logical volume var successfully resized
dbserver:/etc # resize2fs /dev/mapper/sysvg-var
resize2fs 1.41.1 (01-Sep-2008)
Filesystem at /dev/mapper/sysvg-var is mounted on /var; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/mapper/sysvg-var to 1310720 (4k) blocks.
The filesystem on /dev/mapper/sysvg-var is now 1310720 blocks long.
dbserver 1:/etc # df -h /var
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/sysvg-var
5.0G 1.2G 3.6G 24% /var
dbserver:/etc #
lvextend -L +
resize2fs
ext2online
Eg:
dbserver:/etc # lvextend -L +2G /dev/mapper/sysvg-var
Extending logical volume var to 5.00 GB
Logical volume var successfully resized
dbserver:/etc # resize2fs /dev/mapper/sysvg-var
resize2fs 1.41.1 (01-Sep-2008)
Filesystem at /dev/mapper/sysvg-var is mounted on /var; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/mapper/sysvg-var to 1310720 (4k) blocks.
The filesystem on /dev/mapper/sysvg-var is now 1310720 blocks long.
dbserver 1:/etc # df -h /var
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/sysvg-var
5.0G 1.2G 3.6G 24% /var
dbserver:/etc #
Change Time Zone in Linux
Check the /usr/share/zoneinfo directory. Hopefully, it will contain a UTC or
GMT file timezone file. You can then simply link that file to /etc/localtime:
# cp /etc/localtime /etc/localtime.backup ;ln -s /etc/localtime /usr/share/zoneinfo/UTC /etc/localtime
Are you sure you don't have a TZ variable set in your user ENV? Regardless of
system time zone, the TZ variable will over-ride that on a per user basis.
# date
Mon Apr 19 19:39:04 CEST 2004
# mv /etc/localtime /etc/localtime.save
# date
Mon Apr 19 17:39:11 UTC 2004
GMT file timezone file. You can then simply link that file to /etc/localtime:
# cp /etc/localtime /etc/localtime.backup ;ln -s /etc/localtime /usr/share/zoneinfo/UTC /etc/localtime
Are you sure you don't have a TZ variable set in your user ENV? Regardless of
system time zone, the TZ variable will over-ride that on a per user basis.
# date
Mon Apr 19 19:39:04 CEST 2004
# mv /etc/localtime /etc/localtime.save
# date
Mon Apr 19 17:39:11 UTC 2004
Change Date and Time in Linux
Please execute the “date” command in order to see the current time and date settings
[root@racnode-2 ~]# date
Thu Aug 14 17:49:04 BDT 2008
So current time is month 8 day 17, year 2008, time 17:49:04.
Now to change only time to 11:51.30 execute
[root@racnode-2 ~]# date 08141151.30
Thu Aug 14 11:51:30 BDT 2008
[root@racnode-2 ~]# date
Thu Aug 14 11:51:32 BDT 2008
Note that setting date in this way will not cause the date to remain after a reboot. The date command sets the Linux system clock which is separate from the hardware clock.
We can check linux hardware clock by,
[root@racnode-2 ~]# hwclock
Thu 14 Aug 2008 05:57:01 PM BDT -0.788181 seconds
To make date setting persistent update the hardware clock with the date from the Linux system clock.
[root@racnode-2 ~]# /sbin/hwclock --systohc
If you are using universal time then use,
hwclock --utc --systohc
An alternative way is if you want to set the hardware(BIOS) clock so the system will keep the time when it reboots using,
clock -w
or
setclock
after changing date and time by date command.
To set date and time we can also use,
# date -s "2 OCT 2008 8:00:00"
If you wanted to change the year as well, for example to change year to 2007 of 30th April time 11:16pm you could type
#date 043023162007
To change only the time to 10:10 am you also can use,
#date -s 10:10
Using NTP (Network Time Protocol)
This is simple process. Just adding the time server to /etc/ntp.conf and to /etc/ntp/step-tickers Here I use time server as 192.168.1.91.
#vi /etc/ntp.conf
server 192.168.1.91
#vi /etc/ntp/step-tickers
192.168.1.91
Then of course make sure that ntp will start at boot time by,
chkconfig --level 2345 ntpd on
chkconfig --list ntpd
And let's start the service now by,
service ntpd start
It will display output as
ntpd: Synchronizing with time server: [ OK ]
Starting ntpd: [ OK ]
Posted by Arju at 10:53 PM
Labels: How to change date and time on Linux using hand and NTP
0 comments:
[root@racnode-2 ~]# date
Thu Aug 14 17:49:04 BDT 2008
So current time is month 8 day 17, year 2008, time 17:49:04.
Now to change only time to 11:51.30 execute
[root@racnode-2 ~]# date 08141151.30
Thu Aug 14 11:51:30 BDT 2008
[root@racnode-2 ~]# date
Thu Aug 14 11:51:32 BDT 2008
Note that setting date in this way will not cause the date to remain after a reboot. The date command sets the Linux system clock which is separate from the hardware clock.
We can check linux hardware clock by,
[root@racnode-2 ~]# hwclock
Thu 14 Aug 2008 05:57:01 PM BDT -0.788181 seconds
To make date setting persistent update the hardware clock with the date from the Linux system clock.
[root@racnode-2 ~]# /sbin/hwclock --systohc
If you are using universal time then use,
hwclock --utc --systohc
An alternative way is if you want to set the hardware(BIOS) clock so the system will keep the time when it reboots using,
clock -w
or
setclock
after changing date and time by date command.
To set date and time we can also use,
# date -s "2 OCT 2008 8:00:00"
If you wanted to change the year as well, for example to change year to 2007 of 30th April time 11:16pm you could type
#date 043023162007
To change only the time to 10:10 am you also can use,
#date -s 10:10
Using NTP (Network Time Protocol)
This is simple process. Just adding the time server to /etc/ntp.conf and to /etc/ntp/step-tickers Here I use time server as 192.168.1.91.
#vi /etc/ntp.conf
server 192.168.1.91
#vi /etc/ntp/step-tickers
192.168.1.91
Then of course make sure that ntp will start at boot time by,
chkconfig --level 2345 ntpd on
chkconfig --list ntpd
And let's start the service now by,
service ntpd start
It will display output as
ntpd: Synchronizing with time server: [ OK ]
Starting ntpd: [ OK ]
Posted by Arju at 10:53 PM
Labels: How to change date and time on Linux using hand and NTP
0 comments:
Friday, March 26, 2010
How to Find out HAB Firmware and Driver version in Linux server
We can use scli command to find out the HBA Information if the SANsurferCLI? is installed on the system. =======================================================================================================
suselinux10:~ #/opt/QLogic Corporation/SANsurferCLI/scli
Searching for QLogic FC HBA(s) and attached device(s) ...
SANsurfer FC HBA CLI
v1.7.0 Build 12
Main Menu
1: Display System Information
2: Display HBA Settings
3: Display HBA Information
4: Display Device List
5: Display LUN List
6: Configure HBA Settings
7: Boot Device Settings
8: HBA Utilities
9: Flash Beacon
10: Diagnostics
11: Help
12: Quit
Enter Selection: 3
SANsurfer FC HBA CLI
v1.7.0 Build 12
HBA Information Menu
1: Information
2: VPD
Note: 0 to return to Main Menu
Enter Selection: 1
SANsurfer FC HBA CLI
v1.7.0 Build 12
Information Menu
HBA Model QMH2562:
1: Port 1: WWPN: 50-01-43-80-06-2F-A2-28 Online
HBA Model QMH2562:
2: Port 2: WWPN: 50-01-43-80-06-2F-A2-2A Online
3: All HBAs
4: Return to Previous Menu
Note: 0 to return to Main Menu
Enter Selection: 3
Host Name : suselinux10
HBA Model : QMH2562
HBA Alias :
Port : 1
Port Alias :
Node Name : 50-01-43-80-06-2F-A2-29
Port Name : 50-01-43-80-06-2F-A2-28
Port ID : 07-CE-80
Serial Number :
Driver Version : 8.02.00-k6-SLES10-05
BIOS Version : N/A
Firmware Version : 4.03.02 [Multi-ID]
HBA Instance : 0
HBA ID : 0-QMH2562
Actual Connection Mode : Point to Point
Actual Data Rate : 4 Gbps
PortType? (Topology) : NPort
Total Number of Devices : 1
PCI Bus Number : 6
PCI Device Number : 0
HBA Status : Online
Hitto continue:
Host Name : suselinux10
HBA Model : QMH2562
HBA Alias :
Port : 2
Port Alias :
Node Name : 50-01-43-80-06-2F-A2-2B
Port Name : 50-01-43-80-06-2F-A2-2A
Port ID : 08-CE-80
Serial Number :
Driver Version : 8.02.00-k6-SLES10-05
BIOS Version : N/A
Firmware Version : 4.03.02 [Multi-ID]
HBA Instance : 1
HBA ID : 1-QMH2562
Actual Connection Mode : Point to Point
Actual Data Rate : 4 Gbps
PortType? (Topology) : NPort
Total Number of Devices : 1
PCI Bus Number : 6
PCI Device Number : 0
HBA Status : Online
Hitto continue:
============================================================================================================
We can collect the HBA information directly from OS in case scli (qlogic) & linlpcfg (Emulex) not installed
================================================================================================================
suselinux10:~ # cat /sys/class/scsi_host/host2/fw_version
4.03.02 [Multi-ID]
suselinux10:~ # cat /sys/class/scsi_host/host2/driver_version
8.02.00-k6-SLES10-05
suselinux10:~ # cat /sys/class/scsi_host/host2/model_name
HPAJ764A
suselinux10:~ # cat /sys/class/fc_host/host2/node_name
0x50014380062c94b1
suselinux10:~ #
suselinux10:~ # cat /sys/class/fc_host/host2/port_name
0x50014380062c94b0
suselinux10:~ #
suselinux10:~ # cat /sys/class/fc_host/host2/port_type
NPort (fabric via point-to-point)
suselinux10:~ #
suselinux10:~ # cat /sys/class/fc_host/host2/speed
4 Gbit
suselinux10:~ #
suselinux10:~ #/opt/QLogic Corporation/SANsurferCLI/scli
Searching for QLogic FC HBA(s) and attached device(s) ...
SANsurfer FC HBA CLI
v1.7.0 Build 12
Main Menu
1: Display System Information
2: Display HBA Settings
3: Display HBA Information
4: Display Device List
5: Display LUN List
6: Configure HBA Settings
7: Boot Device Settings
8: HBA Utilities
9: Flash Beacon
10: Diagnostics
11: Help
12: Quit
Enter Selection: 3
SANsurfer FC HBA CLI
v1.7.0 Build 12
HBA Information Menu
1: Information
2: VPD
Note: 0 to return to Main Menu
Enter Selection: 1
SANsurfer FC HBA CLI
v1.7.0 Build 12
Information Menu
HBA Model QMH2562:
1: Port 1: WWPN: 50-01-43-80-06-2F-A2-28 Online
HBA Model QMH2562:
2: Port 2: WWPN: 50-01-43-80-06-2F-A2-2A Online
3: All HBAs
4: Return to Previous Menu
Note: 0 to return to Main Menu
Enter Selection: 3
Host Name : suselinux10
HBA Model : QMH2562
HBA Alias :
Port : 1
Port Alias :
Node Name : 50-01-43-80-06-2F-A2-29
Port Name : 50-01-43-80-06-2F-A2-28
Port ID : 07-CE-80
Serial Number :
Driver Version : 8.02.00-k6-SLES10-05
BIOS Version : N/A
Firmware Version : 4.03.02 [Multi-ID]
HBA Instance : 0
HBA ID : 0-QMH2562
Actual Connection Mode : Point to Point
Actual Data Rate : 4 Gbps
PortType? (Topology) : NPort
Total Number of Devices : 1
PCI Bus Number : 6
PCI Device Number : 0
HBA Status : Online
Hit
Host Name : suselinux10
HBA Model : QMH2562
HBA Alias :
Port : 2
Port Alias :
Node Name : 50-01-43-80-06-2F-A2-2B
Port Name : 50-01-43-80-06-2F-A2-2A
Port ID : 08-CE-80
Serial Number :
Driver Version : 8.02.00-k6-SLES10-05
BIOS Version : N/A
Firmware Version : 4.03.02 [Multi-ID]
HBA Instance : 1
HBA ID : 1-QMH2562
Actual Connection Mode : Point to Point
Actual Data Rate : 4 Gbps
PortType? (Topology) : NPort
Total Number of Devices : 1
PCI Bus Number : 6
PCI Device Number : 0
HBA Status : Online
Hit
============================================================================================================
We can collect the HBA information directly from OS in case scli (qlogic) & linlpcfg (Emulex) not installed
================================================================================================================
suselinux10:~ # cat /sys/class/scsi_host/host2/fw_version
4.03.02 [Multi-ID]
suselinux10:~ # cat /sys/class/scsi_host/host2/driver_version
8.02.00-k6-SLES10-05
suselinux10:~ # cat /sys/class/scsi_host/host2/model_name
HPAJ764A
suselinux10:~ # cat /sys/class/fc_host/host2/node_name
0x50014380062c94b1
suselinux10:~ #
suselinux10:~ # cat /sys/class/fc_host/host2/port_name
0x50014380062c94b0
suselinux10:~ #
suselinux10:~ # cat /sys/class/fc_host/host2/port_type
NPort (fabric via point-to-point)
suselinux10:~ #
suselinux10:~ # cat /sys/class/fc_host/host2/speed
4 Gbit
suselinux10:~ #
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