window 7 使用小技巧

Here are some useful Linux commands to use in a XenServer SSH session or at the XenServer console. Compiled by the guys at Citrix...

xe help --all|more

Show a list of XenServer CLI commands
xsconsole

Runs up the XenServer text based console
xe-toolstack-restart

Restarts the XenServer management tools
ls –l

List files in a Directory
less /var/log/dmesg

Display Boot Messages from Linux
xe host-dmesg

Xen Hypervisor Boot messages
tail –f /var/log/xensource.log

Look at xapi messages as they happen
tail –f /var/log/xensource.log | grep xxx

Look at xapi messages only for vm uuid xxx
tail –f [log name] > [target filename]

Send output to a file for analysis later
cat /etc/xensource-inventory

Display XenSource Inventory info
xen-bugtool --yes

Build a status report when xapi is down
xe-backup-metadata -d –u [uuid of SR]

Back up Pool metadata for all VMs
tcpdump –i [inf] –vvv –w [filename]

Get a Packet trace from [inf]. E.g. Inf=eth0, xenbr0, vif2.0 etc.
top

List the top processes running in Dom0
xentop

List top Xen processes
mpstat 5

Processor stats in Dom0
vmstat 2

Virtual memory in Dom0
netstat –s

Networking statistics
iostat -d 2 6

Storage traffic stats
list_domains

Lists VMs that are running
fdisk –l

List the disk partitions
hdparm –t /dev/sda3

Device read times for sda3 (normally local SR)
pvs

Show local and remote LVHD SRs
ll /dev/disks/by-id

Look at disk partitions
lvs

List logical volumes (virtual disks)
vgs

List LVM volume groups
cd /var/run/sr-mount

Look at NFS SRs
df -h

Shows how much disk space you have left
dd if=/dev/sdb of=/dev/null iflag=direct bs=1M count=512

Read data performance from sdb.
dd if=/dev/zero of=/dev/sdb oflag=direct bs=1M count=4096

Write performance on sdb. * Don’t use on disks with VMs on them!
ifconfig

Show info on NICs, virtual switches and vNICs
brctl show

Show info on virtual switches
ethtool eth0

Info for NIC eth0
mii-tool

Info on NIC bonding
iscsiadm -m discovery --type sendtargets --port 192.168.250.14

Discover iSCSI targets available to this server
iscsiadm –m session

Open iscsi sessions
history

Lists the history of commands you’ve used
!136

Executes command #136 in the history
history -w history-list.txt

Writes the history info to a text file
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