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Linux System Timing shutdown Command Detail

The Linux system shutdown command is used to safely turn off / restart the computer, it not only facilitate realize timing shutdown, user can also determine the related parameter. In the execution of the shutdown command, the system will send each terminal (user) a screen display, prompt shutdown operation. T...

The Max_connect_errors MySQL Performance Parameter Details

Max_connect_errors is a counter value related with safety in MySQL, it is responsible for too many failed clients to prevent brute force crack password. The max_connect_errors value and the performance do not have too much relationship. By default, the my.cnf file may not have this line, if you need to set th...

The table_cache MySQL Performance Optimization

Table_cache is a very important property parameters of MySQL, it is called table_open_cache in later 5.1.3 version. Table_cache is mainly used to set the number of high speed cache. Since each client connection will visit at least one table, so the value of this parameter is related to max_connections. The ca...

Chkrootkit Installation and Configuration Tutorial Linux Backdoor Intrusion Detection

From the simple level speaking, Rootkit is a self-concealment backdoor program, it is often used as a intrusion tool by intruder. Through rootkit, the intruder can secretly control a compromised computer, so it has great harm. Chkrootkit is a tool to find and detect rootkit backdoor under the Linux system. Th...

Linux Apache SSL Installation and Configuration Tutorial

Internet line interception exist everywhere, the plaintext transmission data can be stolen if not careful. Apache SSL encryption connection can help visitors to transmit data more safe and reliable. Generally speaking, the ordinary HTTP protocol URL begins with http://, while the SSL encryption protocol is be...

How To Prevent SSH Violent Attacks By DenyHosts

Denyhosts is a software to prevent violent crack SSH password in Linux system, its principle is similar with DDoS Deflate, can automatically reject ip address that try too many times to login SSH, to prevent some Internet server cracking the password, also can prevent hackers exhaustion SSH password. As every...

Linux fstab Automatically Mount Partition Tutorial

Some time when the Linux system partition a new partition, those partition need to be set to automatically mount while boot, otherwise, Linux is unable to use the new partition. /etc/fstab file responsible for configuring automatically mounted partition while Linux boot. The file structure of the Windows is a...

The skip-external-locking MySQL Performance Parameter Details

MySQL configuration file “my.cnf” exist “skip-external-locking” parameter by default, namely “skip external locking”. According to the MySQL official explanation, External-locking is used to MyISAM data sheet on multi process conditions. If you have multiple servers use the...