Linux

Network basic knowledge First,Basic Concepts1.ARPANET & TCP/IP: Integrate network hardware with " software" technology , so that different computers or data can achieve data communication through this software (TCP/IP technology is also known as the

##System Environment Configuration#!/bin/Bash Case$1 inchstart) echo1>/proc/sys/net/ipv4/conf/all/Arp_ignore Echo1>/proc/sys/net/ipv4/conf/lo/Arp_ignore Echo2>/proc/sys/net/ipv4/conf/all/arp_announce Echo2>/proc/sys/net/ipv4/conf/lo/arp_announce;;

Ls-al Show properties for all filesPWD Displays the current pathCD Directory switch directoryCD/Return root directorymkdir Creating a FolderTouch Create FileCat File View FileRM-RF file Delete files or foldersMV Move or renameCP Copy FileVI File

first, the Computer Network FoundationSecond, Mac&ip&portIII. communication subnets and resource subnetsFour, network interface naming specificationfirst, the Computer Network FoundationLinux Network Properties ConfigurationNetwork:Text flow: Turns

Find/-name filename.txt the filename.txt file under the name lookup/directory.Find. -name "*.xml" recursively finds all XML filesFind. -name "*.xml" |xargs grep "Hello World" recursively finds XML file containing Hello World in all file contentsGrep-

1th Linux System Optimization 1.1 viewing the version of the system[Email protected] oldboy]# cat/etc/redhat-6.9 (Final)1.1.1 Kernel version + 64-bit[Email protected] oldboy]# uname-R2.6. -696. el6.x86_64 kernel version bit 2. 6.32[

Today, Guangzhou Heyuan City Technology inform me that their computer room power down, the database server restarts after the RAC2 host lost data3 data directory; Then, you want to adjust the directory to automatically mount the boot,The boot is

To view the contents of a text file:Cat: Suitable for viewing files with less content.Less: Suitable for viewing files with more content. When the file content is more, from the first line display, press SPACEBAR to page, press Q to exit.To view the

Iptabels is a package filtering firewall system integrated with the Linux kernel, and almost all Linux distributions contain iptables functionality. If a Linux system is connected to an Internet or LAN, server, or proxy server connecting the LAN and

First, Set_uidSet_uid is actually a special permission, we look at a file:[Email protected] ~]# ls-l/usr/bin/passwd127832 /usr/bin/ passwdThe X-Permission bit of its owner was replaced by S. So what does this s mean? It represents the normal user

First, check whether the system has RPC service installedUsing LR to monitor Linux, first check to see if the system has the RPC service turned on, and then check to see if the Linux system Daemon Rpc.restat is started, which is a necessary process.

Network Fundamentals 1.2Physical Layer Parsing-----------------------------------------------------------------------------------------------Physical Layer-the foundation of the network------Physical layer is the lowest level of the TCP/IP model-----

One, the view of the file propertiesls-l filename-|rw-r--r--. | 1| Root|   Root| 46 | OCT 1 05:03 |filename---------------------------------------------------------1 2 3 4 5 6 7 81."-": File type-# #普通文件D # #目录C # #字符设备S # #套接字P # #管道B # #快设备L # #连接2

SAMBA is a kind of shared files and printers on the LAN Communication Protocols , it provides shared services for files and printers among different computers within the LAN. The SMB protocol is a client/server protocol that allows clients to access

FTP ServerMain program:/USR/SBIN/VSFTPDUser Control List File/etc/vsftpd/ftpusers/etc/vsftpd/user_listMaster configuration file/etc/vsftpd/vsftpd.confCommon Global Configuration ItemsListen=yes whether to monitor the service in a separate

Reprint http://www.cnblogs.com/lwm-1988/archive/2011/08/20/2147299.htmlThere are two ways of doing this:1. Command &: Background run, you shut down the terminal will stop running2. Nohup Command &: Run in the background, you will continue to run the

Linux commands:An instruction or program used to implement a certain type of function.The execution of the command depends on the interpreterShell (interpreter) system default interpreter for/bin/bashExecution process:User Send

I. Introduction of SaltstackSaltstack is a centralized management platform for server infrastructure, Saltstack based on the Python language, and is based on the C/s architecture, combined with lightweight Message Queuing (ZeroMQ) and Python

I. Configuring the Environmentredhat6.5Server1 172.25.29.1 Hadoop Master NFSServer2 172.25.29.2 NFSServer3 172.25.29.3 NFSServer4 172.25.29.4 NFSServer5 172.25.29.5 High Availability standby NFSTwo. Hadoop single-point configuration1. Installing

In linux, nl80211: cocould not configure driver mode nl80211: deinit ifname = wlan1 disabled_11b_rates = 0 wlan1: Failed to initialize driver interface appears when the wireless network is connected, I. background1.1 jello @ jello :~ $