Linux

Brief introduction For the choice of Linux as an application platform for small and medium-sized enterprises or Web sites, often face how to achieve remote Data backup or Web site mirror image of the problem, although there are commercial backup and

The UNIX system records these three different times for each file, the first one is mtime, that is, the modification time. Whenever the contents of a file are changed, the value of the Mtime is modified accordingly. The second one is Atime, which is

Semaphore, sync these nouns have been said in the process of communication, where they mean the same, except that the synchronized objects are different. However, the interface of the semaphore described below is used for the semaphore of the thread,

By step: Operating Environment Centeros 6 * First run the following command: cat /dev/net/tun The return must be:Cat:/dev/net/tun:file Descriptor inRun:cat /dev/pppThe return must be:Cat:/dev/ppp:no such device or address If the above return is

Foreword: The general Novice does not adapt the LINUXVPS command to build the station, the loading panel is necessary, the KLOXO function is formidable most importantly is supports the automatic backup to be good protects the data not to lose. The

Linux to open URL rewriting method:1, open Apache httpd.conf (usually in the/etc/httpd/conf directory) 2, find #LoadModule rewrite_module modules/mod_rewrite.so Remove the front of the # 3, to find allowoverride None changed to allowoverride all,

Some Linux distributions provide GUI programs for system monitoring, such as SUSE Linux has a great and professional tool yast,kde the KDE System Guard is also excellent. Of course, to use these tools, you have to operate in front of the server, and

In Linux we can convert a large-capacity disk into a GPT format first. Because the GPT-formatted disk is equivalent to the 4*16 byte of the original MBR disk that originally retained 4 partition table, only the first 16 bytes are left, others are

In general we use the manual backup VPS site on it. Generally old left like 1 weeks to back up the site, such frequency should still be good, for yesterday to share the "database/website files Automatic Timing Backup" method is more important for

Linux mount U disk steps are as follows 1: The USB disk plug into the interface, check whether inserted good 2: Check partition and USB device information with fdisk command [Root@wgods ~]# Fdisk-l disk/dev/sda:1000.2 GB, 1000204886016 bytes255

When an executable file is already open for write, the executable file at this time is not allowed to be executed. Conversely, when a file is executing, it is not allowed to be open at the same time in write mode. This constraint is well understood

This technique is very practical. In particular, remote login to a host a, and then from a landing to B, if you want to do some operation on a, you have to open a finalEnd, very troublesome. When you use SSH to log on to a remote host from this

Description: My host for the Centos system, step-by-step instructions are written in the annotation inside, easy to read. VI apachemonitor.sh #!/bin/bash url= "HTTP://127.0.0.1/" Curlit () {curl–connect-timeout 15–max-time 20–head–silent

I. Creating multiple Files# Touch file{001..035}650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/8D/5C/wKioL1iZf7PCKNYrAACMVnXX2WE014.jpg "title=" Qq20170207160355.jpg "alt=" Wkiol1izf7pcknyraacmvnxx2we014.jpg "/>Two. Create multiple

View Burst Count records# Cat/var/log/secure | awk '/failed/{print $ (NF-3)} ' | Sort | uniq-c | awk ' {print $ ' = ' $;} 'Change the SSH default portModify the SSH server configuration file# Vim/etc/ssh/sshd_configYou need to specify a connection

The first part: Linux Rights ManagementI. Basic RIGHTSLinux privilege mechanism adopts UGO mode. where u (user) indicates that the owning user, G (Group) indicates that the owning group, O (Other) is in addition to the owning user, the owning

Log files are an extremely important tool for Linux system security. the Logrotate program is a log file management tool. Used to split the log file, delete the old log file, and create a new log file that acts as a "dump". You can save disk space.

Reprint: http://www.myhack58.com/Article/html/3/8/2017/83236.htm0x00 Operating system relatedOperating system Type version Cat/etc/issue Cat/etc/*-release Cat/etc/lsb-release # Debian Cat/etc/redhat-release # Redhat Kernel

The first way to read all the files is to use an iterative approach, first use the return value of function A to determine if there are files in the directory, and then return the value is valid in the loop with function B until the return value of

Linux-command learning-df, linux-command-df 1. the df command is used to view the storage of the file system disk of the Linux server. You can use this command to obtain the disk space and the remaining space. 2. du: displays the disk space used