Linux

In front of the file system, the file system system is a data storage structure created by the operation bit to facilitate the management of the operating system. When the system is created to complete the file system, how the system is used by the

With the rapid development of the information age, Linux stands out from the operating system due to its many advantages and is favored by more and more computer users. Linux is a set of security, stability, freedom and many other advantages in one

Original address: http://www.cnblogs.com/ggjucheng/archive/2012/08/19/2646466.htmlIptables Brief IntroductionNetfilter/iptables (referred to as iptables) consists of a packet filtering firewall under the Linux platform, just like most Linux software.

1 purposeTo enable automatic cleanup of database authentication logs2 methods1) Writing scripts[Email protected] mysql]# more qingli_t_auth_log.sh#!/usr/bin/expectSet Timeout 1000Spawn mysql-uroot-ppasswdExpect "mysql>"Send "Use

1. File Address:/etc/pssswd-rw-r--r--. 1 root root 936 October 6 12:50/etc/passwd2. Contents of the file:Xiaol_1:x:501:501::/home/xiaol_1:/bin/bash3. Information meaning:1th field: Name of the user2nd field: Password flag3rd field: UID (User

1. Preparing the EnvironmentA. Because it is a compilation installation, you need to install the GCC compilerB. Download the source package2. PrecautionsA. Source Code save location/usr/local/src/B. Software Installation location/usr/local/C. How to

Always encounter the problem of processing files, such as file suffix modification, was written before the shell, and later found that there is an easier wayRename1, under CentOS is written in C renameUsage:A.txt modified to a.ccRename txt cc *.txt

Linux Common commands:Linux File system:1. File names are strictly case sensitive2. Files can use any character except/unexpectedly; special characters are not recommended3. File name cannot be longer than 255 characters4. Files with a. Start as

1. View file size, memory size, CPU information, hard disk space command to display all file sizes for the current directory: LS-LHT Memory space, CPU information, hard disk space: Htop, Top (Htop detailed reference: http://blog.csdn.net/skh2

I. Remote management of Linux servers using OpenSSHSSHD is the server-side daemon of OpenSSH, and its corresponding Windows client software is Securecrt/xshell/putty and so on.OpenSSH is generally installed by default on Linux systems and the

Files and directories cd/home Enter '/home ' directory 'CD: Return to the top level directoryCD.. /.. Return to the top level two directoryCD into the personal home directoryCD ~user1 into the personal home directoryCD-Return to the last

1. Install NFSOnline Learning of NFS installation, found a lot of articles are said to use the Portmap, but in the official CentOS software source and can not find the package.It was later known that Portmap was renamed Rpcbind on CentOS 6.The

After installing the new Linux system, it is very sad to want to switch to the root user with Su root without knowing what the password is.The newly installed Linux system does not have the root user password set, and below describes how to set the

1, first enter the designated directory, such as: Cd/var/ftp/ss2, enter the specified command, the relevant commands are described as follows:Files modified within the last 24 hours find./-mtime 0Previous 48-24 hours modified files find./-mtime 1The.

General Operation Commands:# NETSTAT-ATUNPL |egrep "Mysql|nginx"# Vimdiff php.ini*# RunLevel# rpm-e httpd--nodeps# NTSYSV Graphical Network Settings page# OpenSSL passwd-1-salt ' OpenSSL rand-hex 4 '# Createrepo redhat/Add Fstab Mount:/192.168.1.250:

Basic knowledge of the network:The concept of the network           Network is node weighted graph Network             In addition to the mathematical definition, there are specific physical meanings, that is, that the network is a model

First download maven and unzip and move to the usr/local directory$ tar vxf apache-maven-3.2. 3-bin.tar.gz$ mv apache-maven-3.2. 3/usr/local/maven3 Modify the environment variables to add the following lines in

File types in Linux File type Symbol File type Symbol Normal file - Local domain set interface S Directory D Famous pipes P Character device

Windows:List tasklist=new arraylist ();try {Process process = Runtime.getruntime (). exec (CMDSTR);BufferedReader br = new BufferedReader (New InputStreamReader (P.getinputstream ()));while (In.hasnextline ()) {String p = in.nextline ();if

Disk hot swapping and Linux disk hot swapping on Linux First, obtain information about the scsi device. [root@server2 ~]# lsscsi[2:0:0:0] disk VMware, VMware Virtual S 1.0 /dev/sda[4:0:0:0] cd/dvd NECVMWar VMware SATA CD01 1.00 /dev/sr0