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Iostat can be used to monitor system CPU usage and disk information. Check whether the command is installed: rpm-qa | grep sysstat Check whether this package exists on the installation disk: yum list sysstat You can run the rpm command or: yum-y

SEHLL problems in the work of netizens:Problem description:You need to extract the certificate encoding information output by the following command:# Openssls_client-showcerts-connect192.168.0.111: 443 | sed-ne '/-BEGINCERTIFICATE-/,/-ENDCERTIFICATE-

1. Configure smtp information for the server vim /etc/mail.rcset from=XXX@XXX.com smtp=smtp.xxx.com smtp-auth-user=XXX@XXX.com smtp-auth-password=xxxxx smtp-auth=login Ii. service_check.sh check script content #!/bin/bashfor port in 80 3306 10050 100

FTP is a TCP-based service and does not support UDP. Reduces or eliminates File Processing incompatibility in different operating systems. At the same time, FTP creates two ports, one data port and one command port can also be called a control port )

OpenERP installation documentation server environment: ubuntu12.04-server-amd64 Convention: red for the need to execute the command to install Ubuntu, first configure the network, ensure that the server can access the Internet. In

RelatedPuppetagentEnd Backup recovery solution: Backup solution 1: using customFacterElementsBackupBackup and recovery 1. Deploy facter 1. Create a directory structure [Root @ puppetserver modules] # mkdirpublic/{modules, manifests, files,

Background: The company has a Cisco ipv7r-e switch with two engines for SSO, one master and one slave). a certain day, the main engine suddenly went down, then the service is automatically switched to the backup engine, and now a new engine card is

These days have been looking at BGP, I think the attribute of BGP is a difficult point, sometimes look at to their own are confused, especially the difference between LOCAL-PREF and MED in BGP. after finding some information on the Internet, I can

Frame Relay switch R2No ip routingFrame-relay switching enables the frame relay switch)Interface Serial0/1Encapsulation frame-relay encapsulate frame relay)No ip route-cacheSerial restart-delay 0Clock rate 64000Frame-relay lm-type ciscoFrame-relay

Cascade is connected to another hub through a port of the hub (for example, uplink), and stack is connected through the hub backplane.Stack is only available between devices of your own manufacturer, and the device must have a stack function.

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0435456332-0.jpg "title =" BGP Route reflector RR configuration extension diagram. JPG "alt =" 160508473.jpg"/> R1: Configuration En Conf t Int lo 0 Ip add 1.1.1.1 255.255.255

Vswitch and vro Interface (I) Main vswitch Interfaces (1) RJ-45 Interface The switch has 8 RJ-45 Interfaces 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0415341549-0.png "style =" float: none; "title =" New wpstext

As we all know, VLANs exist for convenience of management and security. How to Create a Vlan? Let me configure a simple Vlan network for communication between VLANs and between non-VLANs! The parameters are as follows: Vlan3: 172.28.255.255.255.255.0

1. network device Initialization Configuration A third-layer switch can be used as a vswitch without configuration. However, a vswitch without configuration cannot provide its functions and security. A vro without configuration cannot implement

In the summer, there was a lot of rain in Beijing, which also brought us trouble in our work. Usually there is very little rain in Beijing. If heavy rain occurs in summer, it is difficult to discharge large amounts of rain. As the saying goes: When

Layer-3 switches use hardware to exchange and route data packets. To process high-level information about data packets in hardware, CISCO switches use a traditional MLS (multi-layer switching) architecture or a CEF (fast forward)-based MLS

2.5 r00002 basic configuration Purpose: 1. master the basic configuration of r12002. 2. Master the classless features of r12002. Tutorial topology: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0630101D9-0.png "title ="

4.1 basic HDLC Configuration Purpose: 1. master the basic configurations of HDLC. 2. Understand the HDLC Encapsulation Format. Tutorial topology: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/06195955L-0.png "title ="

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0559435237-0.png "title =" three-layer switching machine current dhcpfunction .png "/> Vlan da Vlan 10 Vlan 20 Vlan 30 Vlan 40 Exit Conf ter Int vlan 10 Ip add 192.168.1.1 255

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/055614D55-0.png "title =" cisco.png "/> 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0556141032-1.png "title =" topological configuration .png "