Linux

I use CentOs6.5Recently in the Linux operating system, the single use of the shell connection before using ifconfig eth0 set a temporary IP to let me patience. Decide to learn to set up a fixed IPSteps:1. Use the Setup command to enter the interface

Need to use Linux for Remote Desktop Services, Xmanager used before, feel normal, this time to try VncMy operating system is CENTOS7.One service-side installation Vncserver#yum-y Install VNC *vnc-server*Set Password# VncserverYou'll require a

 1. Page CacheLinux OS writes are write-cached by default, and direct IO is used to bypass the operating system's write cache. When you write a string of data, the system will open up a memory area to cache the data, which is what we often call the

Each process has a non-negative integer representing a unique process ID.A process is a data structure variable, how many processes there are, and how many PCBs there are.The IDs of several typical processes and their types and capabilities:ID

1. Set a local folder as a shared file2. Click on the virtual Machine menu, settings, Options, and so on, shared folder, always enable Add (add the shared folder set up in the previous step to the inside)3. Log in to the Linux system, see if the/mnt/

View Linux system version, kernel, and other information1 , view the system version of Linux cat /etc/redhat_release2, viewing the kernel uname -R3, View the number of system bits uname -MAttention:1, root switch ordinary users do not need a

The p option for the Linux useradd command error Usage: #useradd gaojian-p Gaojian# In fact, after-p should be followed by encrypted passwords such as:#useradd Tomjack#passwd tomjack input password plaintext: TomjackView/etc/shadow

Red Hat, after 9.0, is not following the GPL, becoming a premium product, but still open source,Fedora is a branch of Red Hat, the equivalent of Red Hat's white mouseCentOS (Community Enterprise operation System) is a branch of Redhat, the

Basic concepts System Timers A programmable hardware chip capable of generating interrupts at fixed frequencies, timer interrupts, and his interrupt handlers are responsible for updating the system time and performing tasks that

Since the installation of virtual machines and a variety of tool software, the process of learning Linux has been interrupted, has been trying to burn Ubuntu into the itop4412 Development Board, but always failed, feel that the process has

Installing the JDKDownload and unzip jdk-8u91-linux-x64.tar.gz to/optPerform:Alternatives--install/usr/bin/java Java/opt/jdk1.8.0_91/bin/java 2Alternatives--config JavaAlternatives--install/usr/bin/jar Jar/opt/jdk1.8.0_91/bin/jar

Linux file system is asynchronous, that is, write a file is not immediately saved to the media (hard disk, USB stick, etc.), but into the buffer, and so accumulate to a certain extent and then saved to the media. If there is no umount to illegally

1. Uninstalling the JDK#rpm-qa | grep GCJ If the output has no content, it means that there is no JDK, if the output has content, to unload the search to the file, the command is: #rpm-e--nodeps [file output from the previous step] and then use

1. Pdflush Refresh dirty Data condition(Introduction to the principles and parameters of Linux io kernel parameter tuning) The previous section describes the key parameter parameters of the IO kernel tuning. It is concluded that the dirty data in

Linux command-Compression decompression commandCommand name: gzipCommand English original: GUN zipCommand path:/bin/gzipExecute Permissions: All UsersSyntax: gzip "file"Function Description: Compress the file ( and only compress the file, do not

Sysconf This function is used to obtain the configuration information of the system execution. such as page size, max pages, number of CPUs, maximum number of open handles, and so on.#include #include#defineONE_MB (1024 * 1024)intMain () {Number of

Under the Hooks folder in the SVN repository, copy the template PRE-COMMIT.TMPLCP pre-commit.tmpl pre-commitchmod +x PRE-COMMITVI edit as follows: #!/bin/sh# Note must be filled in and not less than 5 characters repos= "$" txn= "$" # Make sure that

Linux vncserver configuration, linuxvncserver You need to use the remote desktop service in Linux. xmanager has been used before. I feel like it is normal. Try vnc this time. My operating system is centos71. Install VNCServer on the server # Yum-y

The "device is busy" solution appears when the Linux umount device is running. umountbusy In Linux, when you use the umount command to uninstall a LV or file, umount: xxx: device is busy may occur, as shown in the following case: [root@DB-Server u06

Keepalived, keepalivednginx Introduction: Keepalived is a high-availability solution for WEB Services Based on VRRP protocol. It is used to avoid spof. The master server sends a specific message to the backup server. When the backup server fails to