CentOS memory release

Last week, a friend asked me why the company's server memory free was 0, which meant where the memory went. this caused a small discussion, that is, the issue of memory release & hellip; first, we may use free to view the memory usage. it should be

A new chapter in system technology development: compiling Linux kernel

Article title: a new chapter in system technology development: compiling the Linux kernel. Linux is a technology channel of the IT lab in China. It includes some basic categories such as desktop applications, Linux system management, kernel research,

PHP for configuring the AMP environment in CentOS7

Install PHP because the PHP version in YUM of centOS7 is old by default, so I try to upgrade to the new version, in this way, the new Yum source configuration yum source is used to append the epel and remi source of CentOS7.0. # Rpm-Uvhhttp: //

Samba analysis and customization skills

Article title: Samba analysis and customization skills. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open

Linux tutorial-Vi entry and exit

Article title: Linux tutorial-Vi entry and exit. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Vi

Customized Linux application environment (1)

Article title: customize your own Linux application environment (1 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open

Linux module verification (3)

Article title: Linux module verification (3 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Next, we need

Introduction to SOHOSIPS technology in embedded Linux (Figure)

Article title: Introduction to SOHOSIPS technology in embedded Linux (figure ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems,

Centostar compression commands

Linuxtar command [root @ linux ~] # Cp [-adfilprsu] source object? N (destination) [root @ linux ~] # Cp [options] source1source2soure3... directory parameter:-c: create a compressed file parameter command (create);-x: unlock Linux tar command[Root @

Gcc best compilation parameters

Article title: gcc best compilation parameters. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. I. Version 1.2

Install Webmin on the CentOS server

1. log on to the server. 2. create a folder to save webmin. we recommend that you create a folder under your account ., 3. Download The Webmin installation file. Command: wgethttp: // Configure. 4. decompress the file 1. log on to the server 2.

SCO is fined 10000 euro for LINUX

Article title: SCO is fined 10000 euro for LINUX. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. On April 9,

FAQs about Nic settings in Linux (2)

Article title: FAQ about Nic settings in Linux (2 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 4

Logical Volume Management for linux Advanced File system management

1. what is LVMLVM (LogicalVolumeManager) logical volume manager. LVM combines several physical partitions or disks into a seemingly independent large disk (VG) through software, and then divides this large disk into usable partitions (LV: logical

Use a third-party rpmfusion source repository in CentOS5.X

In the process of using CentOS5.X, although the software packages in the source warehouse are much more comprehensive than the Redhat, there are still many commonly used packages. at this time, we need to use the third-party source warehouse, I am

Add PATH environment variables to Centos

Add the PATH environment variable. for example, [root @ lx_web_s1 ~] # ExportPATH =/usr/local/webserver/mysql/bin: $ PATH view again: [root @ lx_web_s1 ~] # Echo $ PATH/us Add the PATH environment variable. There are 1st methods:[Root @ lx_web_s1 ~]

How to modify the PATH of the environment variable in Centos

The computer brain is essential to the operating system. However, Linux is developing very rapidly and is catching up with Microsoft. Here we will introduce the knowledge of Linux, so that you can learn how to use Linux. For example, to add

Create an ssh equivalent user on two Centos servers

Create an equivalent user on two linux servers 2) create an equivalent user on node1: [root @ node1 ~] $ Mkdir ~ /. Ssh [root @ node1 ~] $ Chmod700 ~ /. Ssh [root @ node1 ~] $ Ssh-keygen-trsa [root @ node1 ~] $ Ssh-keygen create equivalent users on

Centos CPU optimization

1 View L1, L2. .. dmesgx86info-c (yuminstallx86info-y) 2 hit rate, loss rate view: valgrind -- tool = caohegrind Command 3 View process priority (usually 0 by default) chrt 1. check L1, L2...Dmesg x86info-c (yum install x86info-y) 2 hit rate, loss

How to limit the number of pseudo terminals in Centos

If you want to add (or restrict) users logging on to the service through ssh or telnet, you can modify the kernel parameters to limit the number of users. the following example demonstrates vim/etc/sysctl. added kernel in conf. pty. max = 3 // The

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