Linux

Linux memory mechanism-cache and bufferIn Linux often found that the free memory is very small, it seems that all the memory is occupied by the system, the surface of the memory is not enough to use, it is not. This is an excellent feature of Linux

First, the server is first installed nfs-utils and libs two RPM package can be Yum source for yum-y install nfs-utils*Second, set up the folder to be shared as in mkdir/it settings to change the file share.Third, set the configuration

1.linux user-State and kernel-stateThe Intel x86 architecture has 0~3 four levels of execution, 0 highest and 3 lowest, and Linux uses only 0 and 3, respectively, to represent the kernel State and user state. In Linux, only the kernel state can

This chapter mainly wraps the contents: Historical command Review, and other commands Catalog management: LS, CD, pwd, mkdir, rmdir, treeFile management: Touch, stat, file, RM, CP, MV, NamoDate Time: date, clock, Hwclock, Cal Text view

Analysis of GCC and LinuxGCC in Linux GCC is short for gnu c Compiler, but after so many years of development, GCC not only supports C language, he can also support Ada, CPP, Java, Objective C, Pascal, COBOL, and other languages. He also supports

Analysis of the command prompt format in Linux Generally, the command prompt format is "[user name @ Computer Name Current Directory] command prompt". Of course, you can modify it, that is, edit ~ /. Bashrc file, find the PS1 definition, in which

Study Linux notes (4) -- file operations, linux --Learn cd commands: Absolute path, relative path (./or ../);File List: Ls-F (forward slash indicates directory)-a (display stealth)-l (detailed information)-R (display directory file)-I (display

Compile and install OpenVPN service in centos 6.3 Compile and install OpenVPN service in centos 6.3 OpenVPN is an open-source VPN software used on Linux gateway servers. as its name implies, OpenVPN is used to connect a secure virtual private

[Build Development Environment] install Eclipse in Linux for C/C ++ development, linuxeclipse Introduction C/C ++ IDE is selected in Linux. Eclipse is recommended. Tools involved: JDK and Eclipse.   Installation Process Refer to the http://www.

Modify the nagios password and problems. Htpasswd-c/usr/local/nagios/etc/htpasswd. users nagiosadmin Password Password Service httpd restart   An error is reported in/var/log/httpd/error. log because the slave node loses one second. [Thu Mar 26 09:54

Add a virtual disk to KVM 1. Add a virtual disk through the Virtual Machine manager in the graphic interface 2. Character interface:Add a qcow2[Root @ localhost ~] # Qemu-img create-f qcow2 Co., kvm-clone.qcow2 2GFormatting 'kvm-clone. qcow2 ', fmt

Rapid deployment of Java applications in CentOS 6 At present, the vendors that provide IDC services are really varied, but there are only a few correction services in place. We recommend that you use Windows for time consideration. At least it will

Introduction to viewing and editing CentOS files2.1cat command Introduction The original meaning of the cat command is concatenate, which is used to connect multiple files and output them to the standard output stream (the standard output stream

Configure CDROM as local YUM in CentOS 7By default, CentOS7 does not have any yum source. In this example, mount a local DVD to/mnt/cdrom and connect the system yum source to/mnt/cdrom.# Use yum-config-manager to generate a source file template[Root

How to Set dhcpd in linuxHow to Set DHCP in linuxSetting DHCP in linux is not complicated at all. All you have to do is to set up one file:/etc/dhcpd. conf.Next, I will use my own settings file to explain how to modify this file ﹕Default-lease-time 2

In centOS5.8, manually change the static IP address to a dynamic IP address. first mv/etc/sysconfig/network-scripts/ifcfg-eth0/etc/sysconfig/network-scripts/ifcfg-eth0.bakvi/etc/sysconfig/ the network-scripts/ifcfg-eth0 changes the content to the

Centos6.6 Mount iscsi Storage To solve the company's backup and log problems, we have specially set up a backup server and prepared 8 TB storage space for use. Now we will mount iscsi storage on the client. 1. The client installs the iscsi

Study Linux notes (5)-Mysql ApplicationCheck whether mysql is installed: # Rpm-qa mysql;If the installation has been completed, delete the command: # Rpm-e -- nodeps mysql (-- nodeps is forcibly deleted) Also, use the command line to back up

CentOS installation resinPrerequisites Now install the java environment in centos: Reference address Install Go to the official website to get the following information:Select the rpm format. Run the following command on the centos command line:

Set up DHCP service in CentOS7 I set up the DHCP service to use CentOS 7.0.1406 with the core version 3.10.0-123. el7.x86 _ 64. The CentOS system is installed on the virtual machine, and then connected to the virtual network set up in GNS 3 through