command may bring the data back to life. This process is safe and efficient.2.4.4 copy a disk1) Ensure that the geometric characteristics of the original and target disks are the same2) become a Super User3) Enter touch/reconfigure in the system where the primary disk is used. The/reconfigure file is required for the system with the primary disk, so that the replica disk can be found during restart.4) Input init 0 to shut down the system.5) connect the copy disk to the system and start the syst
the system administrator can only manually back up and restore the server. To solve this problem, the system administrator manually backs up important system files and application database files on the server, use the backup system file to generate a new server that is the same as the original one, and then reinstall the application system to restore the server. The system files that the system administrator needs to back up at ordinary times include the organization validators identifier file
-swap zone does not actually exist (spoofing): It is not in the memory, not in the hard disk or any file system. That is to say, when the real swap zone is used up and a new process needs to be started, tell the systemI still have a lot of swap areas. Who should I start ......
Whether to enable pseudo-swap. You can set this parameter by using the System Kernel Parameter swapmem_on. 1 indicates enabling, and 0 indicates not enabling.
Generally, the size of the actual swap area is greater than
A core database of a customer a few days ago, about 24TB of Rac,asm DiskGroup could not mount. After analysis, it was found that a block of some disk had broken down. There was a problem with kfed read read:$ kfed read/dev/rdisk/disk392 aun=0 blkn=2 | Morekfbh.endian:76; 0x000:0x4ckfbh.hard:86; 0x001:0x56kfbh.type:77; 0X002: * * * Unknown Enum * * *kfbh.datfmt:82; 0x003:0x52kfbh.block.blk:1162031153; 0x004:blk=1162031153kfbh.block.obj:620095014; 0x008:file=386598kfbh.check:1426510413; 0x00c:0x55
I. Establishment of LVM
1. Generate PV Information
#pvcreate-F/dev/rdsk/c0t3d0
#pvcreate-F/dev/rdsk/c0t4d0
2. #mkdir/dev/vg02
3. #vgcreate/dev/vg02/dev/dsk/c0t3d0/dev/dsk/c0t4d0
Description: The meaning of this command is to create VG02, and c0t3d0 and c0t4d0 these two hard drives, of course, you can also include a hard disk, the next time you need to expand the second hard disk, the operation is as foll
1 ensure the original disk and the destination disk have the same geometrical characteristics
2 Become Superuser
3 in the system with the master disk input touch/reconfigure, there is a master disk system needs/reconfigure files, so that when the reboot to find the copy disk
4 Enter init 0 shutdown system
5 Connect the Copy disk to the system and turn the boot on
6 at the OK prompt, enter the boot
7 input dd if=/dev/dsk/device-name of=/dev/
event from the relay logSo the inference is that SQL thread is slowWhy only slave2,3 slow, and slave1 can keep up with it, began to suspect is the difference in parameter configuration, compared to the/etc/my.cnf found after the configuration no differenceTherefore ruled out this reason, and later with Dstat observation, found busy time, slave io write speed does not goSLAVE1:$ dstat----total-cpu-usage-----dsk/total--net/total----paging-----system--U
1. Restore database test to data volume. 2. Then shudowntest. copy all datafiles, tempfile, redofile, to yldata volume. 3. Use pfile, open
1. Restore database test to data volume. 2. Then shudown test. copy all datafiles, tempfile, redofile, to yldata volume. 3. Use pfile, open
As shown below ,, 1. Restore the database test to the data volume first.2. Then shudown test. copy all datafiles, tempfile, and redofile to the yldata volume.3. Use pfile, open test Library, copy pfile --> ylpfile to
be repaired automatically, it will prompt you to manually repair it.
You can perform the following steps for manual repair:1. Enter the system as a single user, for example, in the PROM mode (that is, in the OK status)Run the command boot-s to enter single-user mode or sync, sync, and sync in the system;Init 0 can also enter the single-user mode (as to what is single-user mode, we will introduce it in detail later)
2. If the damaged file has been installed in the file tree, you can enter anothe
In linux, how to mount a hard disk or partition has been frequently asked about how to mount a hard disk or partition in recent days. The steps for mounting a hard disk are described as follows: www.2cto.com 1 Check hard disk partition by 1.1 format. 1.2 df-h check the mount points and partitions. Use the preceding two steps to check the partitions or hard disks that decide to be mounted and then confirm the next two operations: 2.1 format (not required). Generally, we recommend that you format
Use the following command to determine and record the hardware address of the disk to be an image Disk: ioscan-FNC DiskIn this example, the disk used as an image is/dev/DSK/c1t0d0. Please refer to the help pages of each command used below to better understand these commands.Create a root volume group image:
1) swlist-l bundleIf the system has been installed, this command displays ephemeral Disk/UX. If snapshot Disk/UX is not found, you need to load
1. FreeBSDFreeBSD 4.7
When the boot... 9 seconds command is displayed, press
Input: boot-S
After Login
#/Sbin/Mount-
# Passwd
Enter the new password.
FreeBSD 5 .*
If you want to select start mode, Press 4 to enter single-user mode after logging on
#/Sbin/Mount-
# Passwd
Enter the new password.
Ii. Solaris
How to handle Root Password forgetting
1. If you can log on with a common user, % DF/etc, and confirm the device name that contains the/etc directory partition.
% DF/etc
// DEV/
free/Dev/zvol/dsk/rpool/swap 285, 2 8 K 4.0G 4.0G
The swap partition is only 4 GB, and the physical memory is 40 GB, which is obviously too small. It should be caused by this problem.
The solution is to expand the swap partition, and the adjustment method of solaris11 has changed. Different Versions of earlier versions
Root @ bkjia :~ # Zfs set volsize = 30g rpool/swap
Check the adjustment result:
Root @ bkjia # swap-h-lSwapfile dev swaplo blocks fre
as plain text (opening it in the browser instead of showing download dialog ))* CORE-31269 (Crash on Canvas demo)* CORE-31379 (Printing from print preview results in either a freeze or publish upted page)* CORE-31426 (Widgets don't have access to network after restart)
Desktop
* DSK-298346 (Start Bar blanked out after opening background tab)* DSK-307788 (Relative paths in Filename setting for Speed Dial ba
Article Title: solutions to password loss for various types of Unix and Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
1. How to Deal with the forgotten SolarisROOT Password
1. If you can log on with a common user, % df/etc, and confirm the device name that contains the/etc directory partition.
% Df/etc// Dev/
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