patching linux servers

Run vmstat to view the linux Server-Linux Enterprise Application-Linux server application information. For more information, see. Introduction to vmstat Server information is collected through STATSPACK, and VMSTAT information is collected to display the server status. The VMSTAT tool is the most common UNIX monitoring tool that displays the status values of

Environment: Oracle VM Virtualbox, Ubuntu Server 12.04,securecrt 1, first installed in the virtual machine Linux operating system, here I choose is Ubuntu Server, in order to facilitate the follow-up operation, the network recommends bridging (bridge), because the computer is older, virtual machines and Linux are 32-bit When installing Ubuntu, be careful to choose to install the SSH service, if not install

, SYNC, ACK the process of establishing a connection is still obvious! In the use of tcpdump, you need to configure as much as possible the filtering conditions, on the one hand to facilitate the next analysis, the second tcpdump on the network card and the performance of the system will have an impact, which will affect the performance of the online business.Finish this article!Reference Linux performance analysis in 60,000 Milliseconds

As a Linux/unix system administrator, I often ask this question: What can shell do? PHP is so powerful, why not use PHP to complete the work? In fact, shell is mainly used for database backup (SVN backup), scheduled task (crontab), service status monitoring, and ftp remote backup compared with PHP development languages. For these tasks, shell is widely recognized as powerful, which is also one of the basics of every

If we have more than one Linux server, and need to manage maintenance, if you are using putty, usually you will open multiple Windows without a window is a server account login. This can make you confused if we can manage through the following so is it much easier?What tools and skills do we need to complete the above operations: Generate Keys for individual servers SSH Password-free interopera

Linux machines running in the office on a windows PC at home. VNC can be freely obtained and used by millions of people. They come from different aspects such as industry, academic and personal applications. For more information, please visit http://www.realvnc.com/is this software already available in my system? Run the following command to check whether the VNC client and server have been installed in your system:[Tchung @ tchung101 tchung] $ rpm-q

USER PR NI VIRT RES SHR S%cpu%MEM time+ COMMAND 20248 Root 0 0.227t 0.012t 18748 S 3090 5.2 29812:58 java 4213 Root 0 2722544 64640 44232 S 23.5 0.0 233:35.37 Mesos-slave 66128 titancl+ 0 24344 2332 1172 R 1.0 0.0 0:00.07 Top 5235 Root 0 38.227g 547004 49996 S 0.7 0.2 2:02.74 java 4299 Root 0 20.015g 2.682g 16836 S 0.3 1.1 33:14.42 Java 1 root 0 33620 2920 1496 S 0.0 0.0 0:03.82 Init 2 Root 0 0 0 0 S 0.0 0.0 0:00.02 Kthreadd 3 Root 0 0 0 0 S 0.0 0.0 0:05.35 ksoftirqd/0 5 root

How to configure WU-FTP server-Linux Enterprise Application-Linux server application information in a Linux environment is as follows. Among many network applications, File Transfer porotocol plays an important role. Software resources are a very important resource on the Internet. Most of the various software resources are stored on the FTP server. FTP and WEB s

the statistics of the system in a similar dstat format; like Dstat, it collects statistical information about different resources of the system, such as processors, memory, and networks. A simple example given here shows how to use COLLECTL to report network usage/bandwidth. $ collectl-sn-ot-i0.5 Waiting for 0.5 second sample ... # ----------Network----------> #Time kbin pktin kbout pktout 10:32:01 40 58 43 66 10:32:01 27 58 3 32 10:32:02 3 28 9 44 10:32:02 5 42 96 96 10:3

ExperimentLab Environment:Set up two Linux servers on the virtual machine , one as The DHCP server and the other as the client to obtain the IP address automatically;Experimental requirements:One, the Linux server automatically assigns an IP address as a DHCP service;Two, The Linux server obtains the IP address as the

One. Scenario Description:There are a lot of servers in an environment, each server hostname are different, there are hundreds of servers, if one by one through SSH modification, then for us, the workload is very large, and inefficient, and this hostname for our peacetime operation is also very important, When we ssh to a server, if the host name is not set, then we need to know the location of the server b

tcpdump to grab the packet, when the problem is reproduced (such as the log display or a state appears), you can end the capture, and the tcpdump itself with-c/-w parameters, you can limit the size of the crawl packet storage file, When this limit is reached, the saved packet data is automatically rotate, so the total number of packets is still controllable. After that the packet took off the line, with Wireshark want to see how to see, not happy! Tcpdump Although there is no GUI interface, but

One, the Web server. There are lamp (LINUX + APACHE + MYSQL + PHP), accurate speaking of lamp is an architecture, APACHE is Web page, website Server software, MYSQL is database server software, PHP is interpreted language. Of course, you can also use Linux + APACHE + SQL + jsp and so on, these can be paired with, as long as the compatibility can be.Two, the file server. There are samba, FTP and so on.Three

! Don't add any more parameters!-P: Use original file properties (attributes are not changed according to user)--exclude file: In the process of compression, do not package file!Reference Document: Http://www.cnblogs.com/li-hao/archive/2011/10/03/2198480.html An explanation of the SCP command1. Command format:SCP [parameter] [original path] [Target path]2. Command function:SCP is the abbreviation for secure copy, and SCP is a secure remote file Copy command under the

Common FTP servers in Linux include Wu-FTP, vsftpd, proftpd, and pure-ftpd. Wu-FTP has a long history and has many security vulnerabilities. It is not recommended. As a replacement for Wu-FTP, vsftpd, proftpd, and pure-ftpd are three main FTP servers in Linux. Among them, vsftpd is famous for its security and performan

protected] "-bash:ssh-copy-id:command not foundCan try to use the command to solve, directly copy the local PubKey content to the remote server;[email protected]. ssh]# Cat ~/.ssh/id_*.pub | SSH [email protected] ' cat > Ssh/authorized_keys 'Iv. Login to SSH1. No password is required to log on to the remote server:[email protected]. ssh]# ssh [email protected]2, login to the remote server has ports need to add port-p[email protected]. ssh]# ssh [email protected]-P 5111903. You are still require

Use linux for layer-3 top-level game servers-Linux Enterprise applications-Linux server application information. The following is a detailed description. PCLinuxOS CentOS Fedora8 RedHat linux I don't know which one to use. RedHat lin