Linux

Linux uses crontab to perform sqldump scheduled backup database:#!/bin/bashVar= ' Date +%y%m%d '/usr/local/mysql/bin/mysqldump--databases Core|gzip >/apps/sqldump/bak/core${var}.gz/usr/local/mysql/bin/mysqldump--databases access_service|gzip

2.Linux Development machine and intranet server Mutual transfer file method Download file: Running on an intranet server 1 tar-cf - file_name | nc -l -p 8555 Run on a Linux notebook: 1 nc 10.1.1.1

One. The standard editor for UNIX Linux is VIVI Three state modes: Command mode, insert mode, and bottom line mode (last lines). You can generally classify the bottom row mode as command mode① Command mode: Controls the movement of the screen cursor,

In practical applications an application needs to process multiple signals, and for convenience, the Linux system introduces the concept of a signal set. The signal set consists of a data type of multiple signals sigset_t. You can use the following

LS is one of the most commonly used commands under Linux. Here are a few common commandsLS: Displays all non-hidden files in the current directory.Ls-a: Lists all files in the directory, containing the implied files that begin with.Ls-l: Lists the

Domain name and IP information parsing/etc/hosts file has some IP address and domain name hostname information/ETC/RESOLV.CONF has the IP address of the DNS serverstruct hostent{ char *h_name; // official name of the host Char **h_aliases; /

Vi/etc/sysconfig/iptables-A input-m state–state new-m tcp-p tcp–dport 80-j ACCEPT (allow 80 ports through the firewall)-A input-m state–state new-m tcp-p tcp–dport 3306-j ACCEPT (Allow 3306 ports through the firewall)Special Tips:Many netizens add

User name Luy, password 31A1C7GFLL series ViewMC Program DirectoryCd/usr/local/com.wiselong/mc/mc_platformplatform.wiselong.com Domain NameRunning Tomcat./startup.shStop process./shutdown.shKill-9 29653 Kill Process 29653 (disabled)./kill.sh Close

#vim/root/baklog.sh----------------------------------------------------------------------------!#/bin/bashriqi= ' Date +%f 'Tar zcvf/opt/log-$riqi. tar.gz/var/log/*----------------------------------------------------------------------------#chmod

1. Synchronization Time#chkconfig--list | grep NTPNTPD 0:off 1:off 2:off 3:off 4:off 5:off 6:offNtpdate 0:off1:off2:off3:off4:off5:off6:off#chkconfig ntpdate on//self-booting.#service ntpdate Start//Turn on this service#date//is updated at this

shutdown command under Linux shutdown [options] [TIME] [wall]options:--Help for assistance-h shut down the machine-R Restart-C Cancel-K displays only warning messages walltime: two forms:1/hh:mm 24-hour binary2/+m represents M minutes after the

Linux Process memory space segmentation, linux Process Segmentation Linux memory space can be divided into five parts: Text (Code area): stores executable command operations, which are read-only and cannot be written. Bss (static or global):

Linux Performance Index Analysis, linux Performance Index System Analysis standards and Optimization PrinciplesCPUGood: user % + sys % Bad: user % + sys % = 85%Bad: user % + sys %> = 90% MemoryGood: SwapIn (si) = 0 SwapOut (so) = 0Bad: Per CPU

Linux operations (Continuous updates) and linux operationsFile Operations Create a folder: mkdir folder name View the folders and files in the current directory: ls See all files and information in the current folder: ls-l Delete empty folder: rmdir

Linux has 7 runlevel and linuxrunlevel Linux has 7 runlevels)Running level 0: The system is down. The default running level cannot be set to 0. Otherwise, the system cannot start normally.Running Level 1: single-user working status, root permission,

Linux mysql-5.6.26 installation, linuxmysql-5.6.26 Ftp://mirror.switch.ch/mirror/mysql/Downloads/MySQL-5.6/mysql-5.6.26-linux-glibc2.5-x86_64.tar.gzExtract tar -xzf mysql-5.6.26-linux-glibc2.5-x86_64.tar.gz Note: The installation directory must be

Learn the Linux encoding style and the Linux encoding Style For encoding, each coders may have their own style. Many people may not care about the encoding style at all, because the final compilation of the target code by the compiler will not be

Optimize or modify the maximum number of CentOS connections System Environment: CentOS + Keepalived + HAProxy + MariaDB + Galera + MongoDB When we set up a high-availability server environment, we will encounter a limit on the number of

Install Apache2.4 offline on CentOS 6.5 Install Apache2.4 offline on CentOS 6.5 I. Download Apache 2.4. Http://httpd.apache.org/download.cgi Http://mirrors.cnnic.cn/apache//httpd/httpd-2.4.10.tar.gz Packages for solving Dependencies Http://www.

Install Apache2.4 + PHP5.6 + MySQL5.5 (LAMP) in CentOS 6.5) I always think that the best PHP framework in China is ThinkPHP, but some friends say that the Where condition will be lost in the case of DB updates, it means that when conditional updates