Linux

Script Name: mtest1. SH #!/bin/bash# test connecting to the Mysql servermysql= 'which-u root-pThe user is prompted for a password when running the script:This is not good enough for non-interactive scripting. The-P command-line parameter causes

1. Ifconfigviewing network card information2./etc/init.d/network restartNetwork restartPrompt errorThis device isn't activeAnalysisNetwork Mangager and/etc/init.d/network conflictStop Network Manager3. Service NetworkManager Stop4. IfconfigThe first

1.POST---BIOS (boot sequence[check boot order])--MBR (MBR just storage space, bootloader loaded onto MBR [find partition on hard disk with system installed and load system kernel],446byte)-- > Kernel (bootloader loads the kernel into memory, the

One: Kernel interruptThe watchdog interrupt in the Linux kernel is similar to that of the previous bare board, and before writing the driver, it is necessary to cut out the Watch dog module that comes with the kernel, or else the error will occur;

Name Service interchange Configuration (/etc/nsswitch.conf) fileEvery keyword in/etc/nsswitch.conf is a file name that can be/etc/nsswitch.conf controlled under the/etc/directory.Aliases: Mail aliasespasswd: System UserGroup: User WorkgroupShadow:

Basic commands1. Directory processing command: LSEnglish Intent: ListCommand path:/bin/lsExecute Permissions: All UsersFunction Description: Display directory fileLanguage: LS option file or directory-a displays all files, including hidden files

1.Linux Link ConceptThere are two types of Linux links. One is called a hard link, and there is also a symbolic link called symbolic links. By default, the LN command produces a hard link."Hard Connect"A hard connection is a connection that is made

First understand the general Linux file system composition.*/usr/bin,/bin: Holds commands that all users can execute*/usr/sbin,/sbin: Store only commands that can be executed by root*/home: User Default host Directory*/proc: Virtual file system.

Speaking of this theme, I feel angry, I feel that I have been played 10,000 times still keep the gentleman's useless. In fact, the heart is full of Xiehuo!Maybe I should give up, maybe should look at this world, I can't.When? Reimbursement Who?

Multi-core linux kernel Path Optimization Methods: sequential and linuxI was angry when I mentioned this topic. I felt that I had been played for 10 thousand times and kept the gentleman meaningless. In fact, the heart is full of evil!Maybe I should

How to make the Chrome browser more beautiful in Linux environment, linuxchrome In Windows, the font rendering technology Cleartype and DirectWrite are messy. In Mac, font rendering is good, so the key is how to make Chrome font rendering more

Linux 6-use vi and vim, and linux 6 vivim I. Three vi modes and mutual Switch 1. General Mode 1) move the cursor You can use the arrow keys, Page Up, Page Down, Home, and End to move the cursor. G, move to the last row of the file 1G, gg, move to

Logical volume image implemented by LVM System CentOS 6.5x64 The image function of LVM is similar to Raid1, that is, multiple disks synchronize with each other to ensure that data is not lost. 1. Add four physical hard disks and 2 GB space each here

How does VMware extend the disk without restarting the system? In the virtual machine VMware, we sometimes need to add new virtual disks or expand existing Virtual Disks (expand). After adding new disks or disk resizing, the Linux system cannot

Cobbler automatically deploys CentOS 6 and CentOS 7 in batches Introduction to Cobbler When using PXE for batch deployment, there is a defect that only a single operating system can be installed (the same version, only one kickstart file ). However,

Linux memory Cache Analysis BackgroundDuring the performance test, the top command was used to find that the memory cache was about 4 GB. At that time, I was curious about what the cache was. The analysis is followed. During the pressure test, the

Use of ipmitool in Linux This article introduces the use of ipmitool tool. This command is mainly used to operate server hardware, so it is rarely used for General Business O & M, but its functions are very powerful, such: you can restart the

Use of Distributed File System MogileFS Introduction to MogileFS MogileFS is an open-source distributed storage component developed by Danga Interactive under LiveJournal. It is mainly used to store massive small files. MogileFS has three components:

Applications caused by Linux leap second problems Leap second indicates that the Linux system automatically adjusts the system time. This usually happens at the end of a month, probably at the end of June and December, when leap second occurs, the

Linux hard drive failure case sharing This article mainly shares the specific logs and corresponding repair methods in/var/log/messages and/var/log/mcelog after the hard disk fault occurs on the Linux server, as the number of cases increases and the