Linux

Problem Description:Disk 100% , after deleting large files, df-h found disk space not releasedWorkaround:The problem is that in Linux systems, deleting files via RM or File Manager will unlink the file system from the directory structure (unlink).

JDK installation tar.gz is the version that can be used after decompression, here we will jdk-7u3-linux-i586.tar.gz decompression to/usr/local/. 1. Unzip to the current directory: $ TAR-ZXVF/OPT/SETUP/JDK-7-EA-BIN-B145-LINUX-I586-07_JUN_2011.TAR.GZ2,

When a user is using a Linux system, they are actually dealing with the shell, and when the user issues the instructions, they are actually sent to the shell,The shell then translates the user's instructions to the kernel, which is then controlled

1. Introduction of several practical shortcut keysCtrl + u will delete all characters before the current cursorCtrl + K will delete all characters after the current cursorCtrl + b cursor moves forward one characterCtrl + F cursor moves backward one

Task at a certain timeFor user in $ (cat/etc/passwd | cut-f1-d:);d o crontab-l-u $user;d OneDoes a user perform a hidden scheduled task? If a task is being backed upTwo networkssysctl-a | grep xx View network kernel parameter informationSs-s Show

You can use the following command to grab a package command on a Linux system8080 192.168. 9.45 -w ./filename.capDescription Eth0 to monitor the name of the network card, you can use ifconfig to view; TCP represents a packet that crawls

Some concept terminalsAlso called terminal equipment, early because the computer is more expensive, so a host will have multiple terminals, these terminals themselves do not have the computing power, only assume the input and output of information

Netstat (view port)How to use:NETSTAT-LNP (View listening port, and this port for that service)Netstat-an (see the port on which IP, which port is communicating, and the current state)Netstat-an |grep 192.168.111.129:80 |grep-ic estab (view the and

Linux system installed, there will be a default hostname, here in the case of the CentOS system, the default hostname is Localhost.localdomain, for ease of use, we often need to modify the hostname, the following is a way to permanently change the

17th chapter, Equipment and modules17.1 Device Type1. Block Device (Blkdev):Addressing is in blocks and typically supports relocation operations. Accessed through special files called "Block device Nodes".2. Character device (Cdev):Non-addressable,

No, summarize the personal commonly used makefile template for later use.1. Compiling the dynamic library[Plain]View PlainCopy ############################################################# # Makefile for Shared library. # Compile the dynamic

For information on system level/etc/init.d/etc/rc.d/, see previous blog postThe command service can invoke the System V script for the specified service and perform the specified actionService Name [Start | stop | restart | status]Sometimes we need

About Daemons, here are a few things to look at:1.screen2.supervisord (Python)One: Screen　　Start using screenSimply put, screen is a window manager that can multiplex a physical terminal across multiple processes. Screen has the concept of session,

1. What is the relationship between Unix and Linux? Linux has borrowed a lot of Unix design ideas, it should be said, they are similar to the father-child relationship, the first Unix after the birth of Linux. 2. What is BSD? What do we usually say

Linux Environment Preparation After installing Linux in VMware, log in with the root user Configure the Network Environment building of virtual machinesClick Edit to open the virtual Network editorThere are three network cards in

Installing JDK under LinuxStep one: Upload the JDK's compression package to the Linux systemNote: If you do not have a RZ command, you need to install it on a Linux terminal650) this.width=650; "src="

NTP Server Installation configurationRedhat server can download the RPM installation package and execute # RPM-IVH ntp-4.2.0.a.20040617-4.x86_64.rpm or # yum-y install ntp.x86_64Time Synchronization MethodSync Command # ntpdate NTP server domain

I. Kernel module learning    The overall framework of the kernel is very large and contains a lot of components, how to include the required components in the kernel? Select one, all of the components are compiled into the kernel, although the

Https://yq.aliyun.com/articles/11192?spm=0.0.0.0.hq1MsDAs the number of servers to be maintained increases, so does the variety of bizarre problems that need to be addressed in order to solve these "small" problems in a way that requires deeper

Ubuntu Static IP SettingsCheck NetworkIfconfig (not ipconfig)Must have 2 addressesOne loopback address: 127.0.0.1An actual address: 192.168.3.58sudo vim/etc/network/interfaces add 2 addresses.Auto LoIface Lo inet Loopback# The Primary network