查看memcached状态的基本命令，通过这个命令可以看到如下信息：

stats items

输出各个slab中的item信息。s

stats slabs

输出slab中更详细的item信息

stats sizes

输出所有item的大小和个数

stats cachedump <slab_id> <limit_num>

(3) 設置memcached

vim /etc/sysconfig/memcached
PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="512"
OPTIONS=""

(4) 啟動memcached

# Set Memcached to start automatically on boot
chkconfig memcached on
# Start Memcached
/etc/init.d/memcached start
## OR ##
service memcached start

(5) 檢查memcached是否正常的運作。

yum install nc

nc = netcat

echo stats | nc localhost 11211
STAT pid 7599
STAT uptime 10
STAT time 1265288542
STAT version 1.4.4
STAT pointer_size 32
STAT rusage_user 0.003999
STAT rusage_system 0.052991
STAT curr_connections 10
STAT total_connections 11
STAT connection_structures 11
STAT cmd_get 0
STAT cmd_set 0
STAT cmd_flush 0
STAT get_hits 0
STAT get_misses 0
STAT delete_misses 0
STAT delete_hits 0
STAT incr_misses 0
STAT incr_hits 0
STAT decr_misses 0
STAT decr_hits 0
STAT cas_misses 0
STAT cas_hits 0
STAT cas_badval 0
STAT auth_cmds 0
STAT auth_errors 0
STAT bytes_read 6
STAT bytes_written 0
STAT limit_maxbytes 536870912
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT threads 4
STAT conn_yields 0
STAT bytes 0
STAT curr_items 0
STAT total_items 0
STAT evictions 0
END

# Try to get some value
echo get some_value | nc localhost 11211
END

# Not found, but check the stats again
echo stats | nc localhost 11211
STAT pid 7599
STAT uptime 10
STAT time 1265288542
STAT version 1.4.4
[...]
STAT cmd_get 1
STAT cmd_set 0
STAT cmd_flush 0
STAT get_hits 0
STAT get_misses 1
STAT delete_misses 0
[...]
STAT evictions 0
END

A1输入公式后向下拉
=IF(CEILING(ROW()/511758,1)-1=0,"",CHAR(MOD(CEILING(ROW()/511758,1)-2,26)+65))&IF(CEILING(ROW()/18954,1)-1=0,"",CHAR(MOD(CEILING(ROW()/18954,1)-2,26)+65))&IF(CEILING(ROW()/702,1)-1=0,"",CHAR(MOD(CEILING(ROW()/702,1)-2,26)+65))&IF(CEILING(ROW()/26,1)-1=0,"",CHAR(MOD(CEILING(ROW()/26,1)-2,26)+65))&CHAR(MOD((ROW()-1),26)+65)

rpm -qi epel*

rpm -e epel-release-5-3.noarch.rpm

resolu

do not use @ # .... In password

默认 Single Sign On 密码策略指定密码一年后过期。密码即将过期时，vSphere Web Client 不会发出警告。如果因 Single Sign On 系统的管理员密码过期而无法登录到 vSphere Web Client，拥有 Single Sign On 管理员特权的用户必须对其进行重置。

有时候会遇到这样的情况：刚开始给VMWare分配了一个虚拟硬盘，安装Linux后，随着工作中使用得越来越多，虚拟硬盘容量逐渐变得不够用，需要扩充空间。下面说明如何在VMWare中增加Linux的文件系统空间。

我的VMWare中安装的是Fedora 9，不过其它Linux应该大同小异。

首先在VMWare中调整虚拟硬盘的大小（在“Virtual Machine Settings”的Hardware选项卡里选择“Hard Disk(SCSI)”，在右侧的Utilities里选择Expand进行扩展），也可以直接Add一块新的虚拟硬盘。

启动Linux，键入df -h查看磁盘信息：

可以看到新增加的硬盘容量并没有体现在Linux中。使用fdisk -l查看分区表信息。我的信息是：

注意Disk /Dev/sda有40多G空间（刚刚通过VMWare扩展的），但两个Device /dev/sda1和/dev/sda2加起来只有30多G，有10G空间没有被使用。

从调整分区表入手，调整分区表用fdisk。这个过程需要人机交互，我在需要输入的地方加注释来说明

可以看到新增了/dev/sda3扩展分区和/dev/sda5逻辑分区。如果是新增了一块硬盘，也可以直接新建一个主分区，步骤更简单些。

键入partprobe命令，这个命令用于在硬盘分区发生改变时，更新Linux内核中读取的硬盘分区表数据。

我们使用ext3格式化/dev/sda5这个新的分区

格式化完毕后，要将新的分区加入到LVM（Logical Volume Manager）以便以后管理。
我们先用pvdisplay命令查看LVM的物理卷信息

可以看到，只有/dev/sda2加入了LVM的VolGroup00卷组。

使用我们新的/dev/sda5创建LVM物理卷，命令是pvcreate

创建成功，再键入pvdisplay查看

新的物理卷已经创建，但是没有加入任何卷组。现在我们把它加入VolGroup00卷组

加入成功。键入lvdisplay查看我们当前的逻辑卷信息

我们要扩展的是名为/dev/VolGroup00/LogVol00的逻辑卷，使用lvextend命令

扩展成功，此时再键入lvdisplay查看信息，显示如下

LogVol00扩大了10G。但此时键入df -h，会发现我们的空间还是不能用

需要用resize2fs工具调整Linux文件系统大小。如果你的Linux内核是2.6及以上版本，可以直接调整，否则需要先umount相关的设备后进行调整。Fedora 9的内核版本是2.6.25。OK，我们直接调整df命令中列出的/dev/mapper/VolGroup00-LogVol00文件系统

此时再键入df -h命令查看

至此，我们的文件系统扩充完毕。

To review the ARP and ND cache for the VMkernel network interfaces on an ESX or ESXi host, use the local or remote esxcli command. This command is available at the local console of the ESX/ESXi host, and usable remotely from the vSphere Command Line Interface (vCLI) or from the vSphere Management Assistant (vMA) appliance. For installation and/or usage instruction, see the relevant documentation.

1. Open a console session to the location where the esxcli command is available.
   • Open a console to the ESX or ESXi host. For more information, see Unable to connect to an ESX host using Secure Shell (SSH) (1003807) or Using Tech Support Mode in ESXi 4.1 and 5.0 (1017910).
   • Install the vSphere Command-Line Interface command set, and open a console session where it was installed. For more information, see the vSphere Command Line Interface (vCLI) documentation.
   • Deploy the vSphere Management Assistant appliance, and open the console. For more information, see thevSphere Management Assistant (vMA) documentation.
2. Display the list of known network neighbors in the ARP and ND cache for all VMkernel network interfaces using one of the commands:
   • On ESXi 4.1:
     
     esxcli [--server hostname --username root --password rootpassword] network neighbor list
      
   • On ESXi 5.0:
     
     esxcli [--server hostname --username root --password rootpassword] network ip neighbor list
      
   Note: If running locally on the ESX/ESXi host console, no server hostname or authentication is required for the esxclicommand.
   
   The output appears similar to:
   
   Neighbor     Mac Address       vmknic Expiry(sec)
--------     -----------       ------ -----------
10.5.6.7     00:50:56:9a:00:7a vmk0   1200
10.5.6.8     00:50:56:9a:00:57 vmk0   1197
10.5.6.9     00:50:56:9a:00:3e vmk0   277
10.200.1.10  00:50:56:9a:01:09 vmk1   979

In ESXi 5.1, VMware added S.M.A.R.T. functionality to monitor hard drive health. The S.M.A.R.T. feature records various operation parameters from physical hard drives attached to a local controller. The feature is part of the firmware on the circuit board of a physical hard disk (HDD and SSD).


To read the current data from a disk:

1. Determine the device parameter to use by running the command:
   
   esxcli storage core device list
    
2. Read the data from the device:
   
   esxcli storage core device smart get -d device
   
   Where device is a value found in step 1.
    
3. The expected output is a list with all SCSI devices seen by the ESXi host. For example:
   
   t10.ATA_____WDC_WD2502ABYS2D18B7A0________________________WD2DWCAT1H751520
   
   Note: External FC/iSCSI LUNs or virtual disks from a RAID controller might not report a S.M.A.R.T. status.

This table breaks down some example output:

Note: A physical hard drive can have up to 30 different attributes (the example above supports only 13). For more information, seeHow does S.M.A.R.T. function of hard disks Work?

Note: The preceding link was correct as of December 7, 2012. If you find the link is broken, provide feedback and a VMware employee will update the link.


A raw value can have two possible results:

• A number between 0-253
• A word (for example, N/A or OK)

Column descriptions

Note: The values returned and their meaning for each of these columns can vary by manufacturer. For more information, please consult your hardware supplier.

• Parameter
  
  This is a translation from the attribute ID to human-readable text. For example:
  
  hex 0xE7 = decimal 231 = "Drive Temperature"
  
  For more information, see the Known ATA S.M.A.R.T. attributes section of the S.M.A.R.T. Wikipedia article.
  
  Note: The preceding link was correct as of December 7, 2012. If you find the link is broken, provide feedback and a VMware employee will update the link.
   
• Value
  
  This is the raw value reported by the disk. To illustrate a simple Value using the example above, the Drive Temperature is reported as 27, which means 27 degrees Celsius.
  
  A Value can either be a number (0-253) or a word (for example, N/A or OK).
   
• Threshold
  
  The (failure) limit for the attribute.
   
• Worst
  
  The highest Value ever recorded for the parameter.

smartd daemon

ESXi 5.1 also has the /sbin/smartd daemon in the DCUI installed. This tool does not have any command line switches or interaction with the console. If you run the command in the shell, a S.M.A.R.T. status is reported in the /var/log/syslog.log file.

For example:

XXXX-XX-28T10:15:12Z smartd: [warn] t10.ATA_____SanDisk_SDSSDX120GG25___________________120506403552________: below MEDIA WEAROUT threshold (0)
XXXX-XX-28T10:15:12Z smartd: [warn] t10.ATA_____SanDisk_SDSSDX120GG25___________________120506403552________: above TEMPERATURE threshold (27 > 0)
XXXX-XX-28T10:15:12Z smartd: [warn] t10.ATA_____WDC_WD2502ABYS2D18B7A0________________________WD2DWCAT1H751520: above TEMPERATURE threshold (113 > 0)

Notes:

• You can stop the daemon by typing Ctrl+c.
• Logged events should be viewed with caution. As can be seen in the example, all three warnings are irrelevant. The output can vary greatly between manufacturers and disk models.