Linux

Portal :http://www.jianshu.com/p/f4a98a905011Word 802Read 164Reviews 0like 4 Environment:1. Operating system: CentOS release 6.8 (Final)2. Installation version: Mysql-5.6.31-linux-glibc2.5-x86_64.tar.gz3,:

Linux operating system is a multi-user operating system, it allows multiple users to log in to the system at the same time, the use of system resources, in order to make all users work smoothly, protect each user's files and processes, but also for

Readn function function: In the network programming reading data, usually will need to use a read the specified byte to return the function, the Linux system call did not give, need to own encapsulation.READN Implementation code:intREADN

1, explain the PV, UV, IP is what meaningPV (traffic) that is, Page view, pageviews, or clicks, which are calculated once each time the user refreshes or clicksUV (Independent visitor) A unique Visitor that accesses a computer client of your website

In actual production use, such as performing bulk operations, we do not want to create SSH authentication, need to use a password login or link, you can use expect to operate the automatic add password:Expect is not installed on the CentOS system by

What is Samba?The Samba service is similar to the sharing feature on Windows, which enables you to share files on Linux, access them on Windows, and, of course, access them on Linux.is a kind of communication protocol that share files and printers

NFS = Network File systemRole: Allows a system to share directories and files with others.Lab requires a virtual machineInstalling NFS[Email protected]# yum install-y nfs-utils rpcbindThe rpcbind is used for communication.[Email protected] ~]#

When the client close closes the connection, if the server side then sends the data, according to the TCP protocol, the server side receives the RST response, when the server side sends the data to the client again, the system sends a SIGPIPE signal

If the system is found to have a large number of time_wait state connections, by adjusting the kernel parameters to resolve,Vim/etc/sysctl.confEdit the file and add the following:Net.ipv4.tcp_syncookies = 1Net.ipv4.tcp_tw_reuse =

Why Learn Linux?Why learn Linux, everyone has their own reasons:Linux is free without spending a penny, can save a lot of costs;Linux is open source, you can modify the source code according to your own needs;Linux is open and has a wide community,

First, Ptree: View the file directory hierarchySecond, pgrep process name: can view process IDThird, Chkconfig--list: Check the service open status; Chkconfig--list |grep process Name: view the specified process;Chkconfig--level 2345 sshd on/OFF:

Linux Command Learning one:TTY: Displays the current terminal device file650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M00/8B/22/wKioL1hFeEnxkolrAAAKdaP3sPU353.jpg-wh_500x0-wm_3 -wmp_4-s_1336999349.jpg "title=" tty.jpg "alt="

-a displays all files and directories (LS default starts the filename or directory name as ".") As hidden files, will not be listed)-l In addition to the file name, but also the file type, permissions, owners, file size and other information

Tar is responsible for packaging, Gzip is responsible for compressingTar-C: Create compressed archives-X: Unzip-T: View content-r: Append files to the end of a compressed archive file-U: Update files in original compressed packageThese five are

1) kernel boot init2) System initialization: (/etc/init/rcs.conf exec/etc/rc.d/rc.sysinit)3) Init finds the/etc/inittab file and determines the default RunLevel (X) (/etc/init/rcs.conf exec telinit $runlevel)4) trigger the corresponding RUNLEVEL

Edit with Crontab-e, then edit the routine tasks, then save and exit.The specific format is described below:The format of each line is: time-sharing Week commandThe 1th column represents minutes 1~59 per minute with * or */1The 2nd column represents

Install node on Linux and use Linux to compile the best version.1, enter the website of node, find the Linux version download, here we right-click Copy.2. On Linux, use the command Curl-o node.tar.gz

Install Ubuntu (1 ). This is the first time that a blogger has written a blog. Although he is studying computer science, he is also a beginner. I have solved a problem that has plagued me for a long time not long ago. I 'd like to share it with you.

Common configurations of the firewall in CentOS7, and configurations of the centos7 Firewall # Start systemctl start firewalld # view the status systemctl status firewalld # stop disabling systemctl disable firewalldsystemctl stop firewalld # Add a

RHEL6 and RHEL7 restore the root user password, rhel6rhel7root 1. RHEL6 restore the root password Restart the system. The following page appears. Press the up or down key to stop the system and enter the e key. Select the red box option and