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The default version of lsof in CentOS6 is 4.82
The default version of lsof in CentOS7 is 4.87< /p>
The difference between the above two versions is shown in the figure be
Category: Linux
Linux is a free-to-use and freely disseminated Unix-like operating system. It is a multi-user, multi-tasking, multi-threaded and multi-CPU operating system based on POSIX and UNIX. It can run major UNIX tools, applications, and network protocols. It supports 32-bit and 64-bit hardware. Linux inherits Unix’s network-centric design philosophy and is a multi-user network operating system with stable performance.
Application process monitoring under Linux
Two ideas:
First, execute the monitoring script regularly
Use the crontab that comes with centos to execute the status.sh script regularly as needed.
#!/bin/bash
status=$(ps
LINUX basic article
One, the type of user
1. root administrator: all permissions (rwx)
2. file owner (u): who created Who owns
3. Main group (g): user group AAA {A1,A2}
4. Other users (o): does
LINUX (CENTOS) Automatically performs script (rc.local)
1. There are many ways to boot Linux. For example, I set mysql boot to start as: chkconfig –level 35 mysqld on
Second, let’s talk about booting through the rc.local file:
1 , First cre
How to implement password login in Linux
The normal process of logging in to mysql is generally to execute the following command:
mysql -uroot -p
and then enter the password. In the local linux system, if you want to automatic
Linux network programming 2, TCP connection API
First, server side
1, create a socket:
int socket(int domain, int type, int protocol);
domain: Specify the protocol family, usually AF_INET.
type: Specify the socket type, a
Create import export of Linux database and some basic instructions
First check mysql related directories under linux
Execute query SQL< /p> mysql>show variables like ‘%dir%’;
datadir is the data path
The running path is determined, and the impo
Disk quota management
1. Introduction to the use of disk quota management
In the Linux system, due to the multi-user and multi-tasking environment, if a few users use a lot of disk space, other users’ Normal use, so yo
Linux Foundation – Process and Service (1)
Process in Linux: an executable running instance that has been started
1, PID: process ID (each new process has a unique PID)
3, any process can create a child process
4, above re
Linux07 – Install MySQL
①Check the work CentOS6 rpm -qa|grep mysql or rpm -qa | grep mysql
If mysql-libs exists The old version package is as follows:
must be Perform uninstallation! ! ! Uninstall command: