Linux

recently, I have been writing PPC simulators and assemblers, also in the design. So the new look at "Bird's Linux private dishes", or a lot of commands are not familiar. I'm going to write a few blog notes down. 1. nl [-BNW] FileName: Add line

Linux FTP ServiceActive Mode Port : The server actively initiates a data connection. The client establishes an FTP data connection to the server port . The server sends data from port to client random port. Passive Mode PASV : The server is

1. How to add a user to the Sudoer list:chmod +w /etc/echo'mirandam all= (All) nopasswd:all' >>/etc/chmod -w /etc/2. For loop Example: for in $ (find ' *.xml '-do Done3. String segmentation:INPUT == 'echocut'_'2echo //4. Replace the regular

1. grep: Search for text based on the pattern and print the line of text that conforms to the patterncommands to filter text using patterns defined by basic regular expressionsgrep Option mode (regular expression) parameterPattern: A matching

First step: Create a new virtual machine on the virtual machine, next select the Red Hat Enterprise Linux 5 64-bit version of the operating system Linux650) this.width=650; "title=" 1.png "style=" Float:none; "src=" http://s3.51cto.com/wyfs02/M02/41/

Background:We often encounter the problem of handle leaks when developing Linux online servers. Because in the Linux system design to follow everything is the principle of the document, that is, disk files, directories, network sockets, disks,

1. Simulate the repair of MBR sector after being destroyed. MBR Failure Recovery:1. BackupAdd a hard driveTo start the operating system:To add a hard drive:To format a partition:Mount:Do backup:Destroying MBRRestart the system:Shutting down a

Three editing modes for VI Command modeYou can control the movement of the cursor in this mode, you can delete characters, delete rows, and copy and move a paragraph Input modes (Insert mode)You can enter characters only in this mode Last-line

Linux file typesSmall mirror of the App StoreWe have just mentioned using "ls-l" to observe the first column of the 10 characters, the first character is the type of the file. In addition to the common General profile (-) (d), what kinds of file

Monitoring system resources:Vmstat#vmstat [ sampling time ] [ sample Count ] such as : #vmstat 3 2Sample every 3 seconds for a total of 2 samplesOutput information each field explains R indicates how large the run

The role of a Linux under Link fileLinux pays particular attention to the user's privileges, and the role of the linked file is a reflection of this aspect. The location of the source file is hidden, and the user only operates on the linked file.The

1,/ETC/MOTD fileThe file is the message of today (bulletin board information), and each time the user logs in, the contents of the/ETC/MOTD file are displayed in the user's terminal. System administrator can edit system activity messages in

What is Job managementwork from the translation of the job command,the job command can view the process of working in the background. For example, what is job management, when you want to pack a larger directory, is time consuming, but you need to

Linux boot-up processAt the beginning of the system, the system will actively read the BIOS loading hardware information and hardware self-detection, and according to the set of the first boot device to obtain the MBR (main boot record area) in the

CentOS network-related query script 1. View TCP connection status Netstat-nat | awk '{print $6}' | sort | uniq-c | sort-rnnetstat-n | awk '/^ tcp/{++ S [$ NF]}; END {for (a in S) print a, S [a]} 'or netstat-n | awk'/^ tcp/{++ state [$ NF]}; END {for

Server heat dissipation and Linux Temperature DetectionWhen the server is placed in poor cooling conditions, this will lead to premature damage to the hard drive, and other components of the server will soon fail. When a modern server motherboard

Check the storage engine type of MySQL Data Tables on Linux. Question: I want to know whether my MySQL database is of the MyISAM or Innodb type. How can I check the MySQL database table type? MySQl mainly uses two storage engines:MyISAM and Innodb.

Linux Top commands (1) TOP is a dynamic display process. You can press the buttons to refresh the current status. if you execute this command on the foreground, it excludes the foreground until the user terminates the program. more accurately, the

Optimize System Parameters in CentOS to build high-availability LNMP WEBMain reference:Http://www.howtocn.org/nginx:%E9%85%8D%E7%BD% AE %E4%B8%80%E4%B8%AA%E9% AB %98%E6%80%A7%E8%83%BD%E7%9A%84nginx_fastcgi%E6%9C%8D%E5%8A%A1%E5%99%A8I. Linux system

Force reset Mysql password in CentOS 7 The security mechanism of Mysql 5.6 is enhanced. By default, a password is randomly generated for the ROOT user and stored in the/root/. mysql_secret directory of the installation user. (1) log on with the