Linux

Software upgrades are improvements to software functionality and security upgrades, similar to Windows systems, the Linux operating system also needs to update the software on a regular basis, keep the software always in the latest state. Linux

The Linux file has three time attributes: 1) Mtime: file content Last modified time 2) CTime: File state changed time, such as permissions, properties were changed 3) Atime: File content is accessed time, such as cat,less, etc. By default, LS

Overview Epoll is Linux provides a multiplexing technology, similar to each platform to support the Select, but only epoll in the implementation of the kernel to do more optimization, can support more than select File descriptor, of course, also

reentrant functions Reentrant functions (that is, functions that can be interrupted) can be invoked by more than one task without worrying about data destruction. Reentrant functions can be interrupted at any time, and after a period of time can

First, look at the General IP command: Ifconfig Linux View IP address command--ifconfig Ifconfig command to view and change the address and parameters of a network interface $ifconfig-A lo0:flags=849 MTU 8232 inet 127.0.0.1 netmask ff000000

　　Example: Deployment environment Depending on your business needs, you can choose any of the following ways to deploy a cloud server ECS instance's usage environment: Mirrored deployment Manual deployment The following table lists the

Installing SNMP Http://www.zijidelu.org/thread-7479-1-1.html Yum Install Net-snmp net-snmp-devel net-snmp-utils CentOS Install SNMP Install NET-SNMP CentOS and other Redhat series products provide a NET-SNMP binary package. We can install it

SVN installation The SVN server operates in 2 ways: Standalone servers and Apache. Svnserve is lightweight and simpler than Apache, and Svnserve is included in subversion, so as long as subversion is installed it's equivalent to installing a small

Here are 100 uses, what's wrong, and please correct me. 1,echo "AA" > Test.txt and Echo "BB" >> test.txt//> Empty the original file and write the contents to the file,>> place the content at the end of the file 2,chmod go+w-r/home/zhangy//To add

Although Linux is a multi-user system like the Windows nt/2000 system, there are a number of important differences between them. For many administrators accustomed to Windows systems, there are many new challenges to ensuring that Linux operating

According to foreign media reports, Linux does not seem to be fully loved by people. Apple's OS X and Microsoft Windows and other operating systems have been the focus of attention, but in fact, free and open source Linux operating systems, although

Company currently has a server, network environment is too high, that server and source server connection download, ran to 400m-500m, in order to control, so studied the TC, to do flow control. Give him a little bit of control, don't let this one

Linux Base command (1) LS command Linux Basics Command (2) CD command Linux Basics Command (3) PWD command Linux Basics Command (4) mkdir command Linux Base Command (5) RM command Linux Basics Command (6) rmdir command Linux Basics Command (7)

Rsync sometimes because the server time is wrong, you need to change the time of the file modification, you can use the Touch command to modify the file's modified time: 1 touch-c-m-t 201101110000 teadme.txt Modified Readme.txt to January 11, 2011:00

Deadlock (deadlock) Refers to two or more than two processes in the execution process, because of the contention for resources caused by a mutual waiting phenomenon, if there is no external force, they will not be able to proceed. At this point the

Objective:Most of the contacts in Linux are commands and files.　　CommandThe command is in its format, and the general format is command [option] Parameter1 parameter2 [paramete3 ...] ；Comments:command is an order. These are the command names that

This article summarizes some of the commands and parameters that are commonly used when adding or removing users and user groups from Linux. 1, build User: AddUser PHPQ//new PHPQ user passwd PHPQ//Set password for PHPQ user2. Build Working Group

There was such a mistake in the process of building the library by hand today.ERROR:Ora-09925:unable to create audit trail filelinux-x86_64 error:2: No such file or directoryAdditional information:9925Ora-01075:you is currently logged on[Email

in the Linux system Build File system, build user, modify user group, reset user passwordExperimental background: User and Space user name: BOSSWLB      Group and satellite group:  BOSSWLB        home directory: /BOSSWLB             shell:

Deploy the log server with rsyslog in Linux & record history and send it to rsyslog server, linuxrsyslog1. syslog service Introduction Rsyslog is a multi-thread enhanced version of syslogd. Rsyslog is responsible for writing logs, logrotate is