Linux

It said so many common commands, there is a function we also often use, is the timer, schedule, generally through the crontab to run;crontab specifies that specific scripts are executed at fixed or fixed intervals; crontab has the following 3 common

Linux under passwd command detailed Feature Description: Set the password.Syntax:passwd [-dkls][-u ][user Name]Additional Note:the passwd directive allows users to change their own passwords, while system administrators can use it to manage

Linux under chage command detailed Function: Modify the expiration date of the account and passwordUsage:chage[-l][-m mindays][-m maxdays][-i inactive][-e expiredate][-w warndays][-d lastdays]usernameOptions and Parameters:- L : Lists the

When using the finger and tree instructions yesterday, it was discovered that Linux did not install these two instructions by default. So I tried to install the two instructions.We have to have a clear idea before we do the operation, so we can do

"Bird Brother's Linux private cuisine" Basic study P382 said that in bash "=" and "= =" are the same, all mean to judge whether the equality, but because other languages generally written using "= =", it is recommended to use the latter. but in the

2014-07-29 23:36:10Use file descriptors to represent device files and normal files under Linux. The file descriptor is an integral type of data, and all operations on the file are implemented through file descriptors.The file describes the hub in

#define ARRAY_SIZE (x) (sizeof (x)/sizeof ((x) [0])Test procedure:#include #include struct dev{int a;char b;float c;}; struct Dev devs[]={{ 1, ' A ', 7.0,},{ 1, ' A ', 7.0,},{ 1, ' A ', 7.0,},};int main () {printf ("int is %d \ n", sizeof

Reprinted from: http://edsionte.com/techblog/archives/4019The partition page box allocator implemented in the Linux kernel based on the partner algorithm is suitable for large chunks of memory, and its allocated memory area is based on the page

The meaning of the number represented by the man command1. View by Man 7 Mans1 commands or executable files that the user can manipulate in a shell environment such as which2 system core can call functions and tools, etc.3 some commonly used

Jconsole monitors tomcat JVM memory, threads, CPU, and jconsolejvm JConsole was introduced from Java 5 to monitor Java application performance and trace Java code. Jconsole is a built-in JDK monitoring tool. You only need to find the JDK

Dynamic library generation and use in LinuxDynamic library generation and use in Linux I. Basic concepts of dynamic libraries 1. The dynamic link library is the library loaded when the program runs. After the dynamic link library is correctly

How to mount iscsi targets on centos Few users set authentication passwords on iscsi targets. This is not safe. You can talk about the mounting process here: First, you need to download the Mount utility: Yum search iscsi: Iscsi-initiator-utils

Linuxcsocket source code case Service end # Include # include # include # include # include # include # include # include # include # include # define MYPORT 8887 # define QUEUE 20 # define BUFFER_SIZE 1024int main () {// defines sockfd

View the running path of a process in linux In linux, you may think of ps-ef | grep XXX. But what we see is not the full path. How can we see the full path? After each process is started, there is a pid path under/proc. Example: ps-ef | grep

Set up Tomcat 7 in CentOS6.4 Check java version information Java-versionJava version "1.7.0 _ 65"OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode) If not, install: Yum-y install

Create and delete soft links in CentOSUse the ln-s raw file or the target file or folder to create a soft link.Note: Due to limited space, you do not need to change the original program file and continue to read the/data/ftp directory content. You

Mysqladmin in the SuSElinux System -- The sleep parameter usage is inaccurate. We all know that in MySQL, you can use the extended-status option of the mysqladmin command to view the running status of MySQL, for example, to obtain the values that we

Linux Advanced Skills: Cluster construction (1)1. Cluster introduction:Cluster technology is a new technology. With cluster technology, you can obtain relatively high performance, reliability, and flexibility at a low cost, task Scheduling is the

How to Learn the common operation methods of linux Files 23:36:10 In linux, file descriptors are used to represent device files and common files. The file descriptor is an integer type of data, and all operations on the file are implemented through

Build a php Development Environment on CentOS7.0-Lamp 1. Install mysql directly using yum. mysql is replaced by mariadb in centos7.0. Command: Yum install mysql-server mysql After installation, select to modify the default password of the root user