Linux

UptimeFunctionOutput System Task queue informationOutput current system time, system boot to current run time, how many users online and system average load, etc.Example[Email protected] ~]# uptime20:25:06 up 18:21, 2 users, load average:0.00, 0.01,

The first part First to install the Epel extension sourceYum Install Epel-release Then install HTTP PHP MySQL separatelyYum install httpd php php-mysql mysql mysql-server mysql-devel php-gd libjpeg libjpeg-devel libpng libpng-devel

RPM Common CommandsInstallation-IVH: Installing the RPM Package--nodeps: Forced installation with ignore dependencies--REPLACEPKG: The package is forcibly installed regardless of whether the package has been installedUnloading-E: Unload RPM Package--

[[email protected]/]# sort order ^C[[email protected]/]# sort/etc/passwdadm:x:3:4: adm:/var/adm:/sbin/nologinbin:x:1:1: bin:/bin:/sbin/nologindaemon:x:2:2:d aemon:/sbin:/sbin/nologindbus:x:Bayi:Bayi: System Message bus:/:/sbin/nologinftp:x: -: -:

A simple way of thinking this stuff needs namespace support,First open socket, a serial path (packet_set_ring ()->INIT_PRB_BDQC ()Prb_setup_retire_blk_timer ()->prb_init_blk_timer ()Prb_init_blk_timer ()->init_timer ()) generates a Timer object, hog

1. List the user names of all logged-in users on the current system, note: The same user logged in multiple times, only one time is displayed[email protected] ~]# who | Cut-d '-F 1 | Sort-uAdminRoot2. Remove the shell that is the user's default

In order to complete the compilation first, the following steps are required:1. Go to the Linux subdirectory and perform make. (This step is patching.) ）2, return to the previous level directory, open file simplec.c, add header file #include .3.

Linux zip commandZip-r myfile.zip./*All files and folders under the current directory are compressed into myfile.zip files, and-R indicates that all files in the subdirectory are compressed recursively.2.unzipUnzip-o-d/home/sunny Myfile.zipUnzip the

A. Lists the user names of all logged-in users on the current system (only once with the user logged on multiple times). The title does not indicate whether the username is allowed to be sorted, so it can be written as:# who | Cut-d '-f1 |

System InformationThe processor architecture of the Arch Display machine (1)UNAME-M Display the processor architecture of the machine (2)Uname-r displaying the kernel version in useDMIDECODE-Q Display hardware system

1. Copying files Cp:copy Format Srcfile DEST A file to a file Multiple files to a directory Note that nothing on the back of the CD is to enter the user's home directory If the destination file does not exist, the

1. Difference Differences before installation: conceptual differences The difference after installation: different installation locations 2, RPM Package installation location Installed in the default location

[Email protected] rh]# pwd/opt/rh[[email protected] rh]# lsRhel-server-6.4-x86_64-dvd.iso[[email protected] RH] #mkdir/mnt/cdrom[Email protected] dev]# mount-v-t Iso9660-o loop/opt/rh/rhel-server-6.4-x86_64-dvd.iso/mnt/cdrom/Mount:going to use the

Chmod is the right to change a file Chown is the owner and genus of the modified file Chgrp only the genus group that changed the file.(1) chmod is the right to modify the file/directory. can have text modification and digital modification.#chmod

First, configure the host to access the TCP/IP networkRouting:Host routes: HostsNetwork routing: NetDefault route (Gateway):d EfaultDNS server:Primary DNS ServerAlternate DNS ServerHost Name:Configure IP:How network devices represent:Kernel

Example of UDP socket programming:The server-side code is as follows:? 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465 66676869 /******************************

Bugfree3.0.4 Linux Environment Installation GuideBugfree System Installation premise is to configure the lamp environment (apache+mysql+php), the following centos6.3 system as an example of bugfree3.0.4 installation steps.First, installing the

Linux video player, see many web pages are recommended MPlayer, so they installed a test. The installation process is documented below.1. Installing the DecoderThe decoder includes:

Introduction to Linux hardware I/O optimization and linuxioIntroduction to Linux hardware I/O Optimization First of all, let's briefly introduce the following hardware devices ): 1. CPU: the central processor is one of the core components of

In linux, SSH is started and automatically started upon startup. in linux, ssh is started. Address of this Article Sharing outline: 1. Check whether startup is enabled. 2. Set automatic start   1. [Check whether startup is enabled] Start the