Linux

SQL Server data migration to MySQL considerations: Some field types are different and need to be converted during migration Unique indexes differ, only one null is allowed for a unique index column in SQL Server, but there can be more

1. Find all files in the current directory that end with. Tar and move to the specified directory:Find. -name "*.tar"-exec mv {}./backup/;Note: Find–name is mainly used to find a file name,-exec, Xargs can be used to take the previous results, and

The data is stored on the disk, and the files are stored in the form of data. Because the data on the disk is stored continuously, it is necessary to manage it. That is, the file system (FS).First, FS should be independent of the OS, the smallest

Linux password:root;First, commonly used directives:1.sudo apt-get install vim ( indicates to install vim This software,sudo means administrator rights) 2. Check the GCC compiler version:gcc-v ( Note: "-" preceded by a space )The GCC compiler is

1, install Prce (redirect support) and OpenSSL (HTTPS support, if you do not need HTTPS can not be installed. )Yum-y Install pcre*Yum-y Install openssl*2. Download Nginx 1.7.8wget http://nginx.org/download/nginx-1.7.8.tar.gz3, unzip the installation

Narrative:The Chinese Input method installs the FCITX0x01First install the language pack, if the system language has been set to Chinese, you can omit this step, there is a point to explain, if the English system switch to Ali and then want to

First, the service side1. Install the Samba packageYum-y Install Samba2. Add Samba AccountUseradd-s/sbin/nologin HarryPdbedit-a Harry//Enter Password 2 times3. Modify the ConfigurationVim/etc/samba/smb.confAdd in last line[Common]Path =/commonSecond,

1. Querying a line in a fileSed-n ' 1000p ' 1.txt--Query the 1000th line of 1.txt2. Query 1 to 5 rowsSed-n ' 1,5p ' 1.txt---Querying lines 1th through 5th of 1.txt3. View the last 1000 rows of dataCat FileName | Tail-n 10004. View data from 1000 to 3

01: File Search Command + find [Search Range] [match condition][Match condition]-name search by name (exact search, fuzzy query with *, indeterminate single letter?) -iname case insensitive-size +1024 Search by size-user Root based on owner

vim/etc/security/limits.conf Add the following content* Soft Nofile 65535* Hard Nofile 65535and add boot bootVim/etc/rc.localUlimit-shn 65535Under Nginx process Check maximum file open number script#!/bin/bashFor PID in ' PS aux | grep Nginx |

Rsync syncs through services/etc/rsyncd.conf is the default profile for Rsync, the profile does not exist, and you need to edit the contentOperations on the primary server:1, [[email protected] rsync]# cat/etc/rsyncd.conf#启动的端口port=873#log文件Log File=

Vim/etc/profilenet.ipv4.tcp_syncookies=1--Protect against a small amount of SYN attacksnet.ipv4.tcp_tw_reuse=1--Turn on Reusenet.ipv4.tcp_tw_recycle=1--enable fast recovery of TCP time_wait socketsnet.ipv4.ip_local_port_range=10000 65535--does not

I. Introduction of Cobbler Cobbler is a Linux server-installed service that allows you to quickly install, reinstall, and manage Dhcp,dns, as well as the physical server and virtual machines through a network boot (PXE) 1. Main functions:①cobbler

In Linux, the tasks performed by the cycle are typically handled by the cron Daemon (ps-ef|grep cron). Cron reads one or more configuration files that contain the command line and its invocation time.The cron configuration file is called "crontab"

Http://jingyan.baidu.com/article/546ae1853947b71149f28cb7.html1. Lsof-i: Port number2. Netstat-tunlp|grep Port numbercan see which process is consuming the specified portTools/Materials Linux,windows Xshell Method/Step

Narrative:Ubuntu17.04 comes with Python2.7 and Python3.5.3 version, because Python2 and Python3 have some gaps may need to install the update Python3 version, and switch the default Python interpreter.0x01Get the latest Python source through wget,

Linux is REDHAT4, python2.6 is installed by default, the Python script content that needs to be executed contains the standard library Xml.etree.ElementTree A ITER method used in the library is a new feature of python2.7, so it needs to be upgraded

A few days ago, the Windows system failed and needed to be reinstalled, since Windows 7 and CentOS 7 were installed on the hard disk before Windows system rewritten MBR caused CentOS to boot, because there is data in CentOS, Unwilling to reload, he

After Windows and Linux are installed, MBR and GRUB2 are repaired. The previous day, the Windows system was faulty and had to be re-installed because Windows 7 and centos 7 were installed on the hard disk at the same time, after Windows is installed,

What should I do if I forget my logon password when the linux (redhat) system is installed on the vmwarevm? vmwareredhat Today, I opened the previously installed vmwarevm. After it was started normally, I couldn't remember the login password.