linux system administrator tutorial

The Linux system administrator should know the monitoring tool. If you want to monitor the performance of the Linux server, try the built-in shell commands and some additional tools. Many Linux distributions have "tons" of monitoring tools. These tools provide measurable inf

ourselves permission to access sudo, so just add it at the bottom: Username all= (All) all//grants sudo access to the user "username" %wheel all= (All) all//grants sudo access to all users belonging to the wheel user group The user name you specify now will be able to use all of the root permissions. You can also allow a user or group of users to have sudo access to a particular service or server instead of the all parameter, but that's another topic.Several optionsAs with any

-09-28 08:24@_evil MOF Calling WMI timed start does not ensure that no-kill sex specifically what does it mean?The. NET remoting is also very fun, estimated that not many people use ~ 26#_evil (Popular science is a kind of commonweal behavior) | 2015-09-28 08:58@ Miyoshi Students MOF calls WMI timed to start . NET Remoting These two really did not try, long to see the empty toss under thanks. 27#erevus | 2015-09-30 10:18You can try code audits, plug the shell into the database. 28# Fire

Finish the basic part of Linux before June 30.Content included: Marco Basics of Linux Tutorial Brother Bird's Linux private cuisine-Basic Learning ChapterThe first part is to know Linux and Linux host planning and ins

Use Linux to restore the Windows system administrator password-general Linux technology-Linux technology and application information. The following is a detailed description. If you accidentally forget the Windows administrator pa

else can edit the file. Once you have completed the editing work, it will parse the file to find out if there are any simple errors. Editing sudo files is much safer than just using any old text editor.The file contains many parameters. You can specify which users or which user help can execute which commands. We're going to give ourselves permission to access sudo, so just add it at the bottom:Username all= (All) //%wheel all= (All) // Grant sudo access to all users who belong to the

assume that neither command has permission to write information to the TEST.ASC file. There are two ways to solve this problem. The first is to use the "sh-c" command, which allows bash to execute a string as a complete command, so that the scope of sudo can be extended to the entire command. The specific usage is as follows: $sudo sh-c "Echo ' another line of information ' >> TEST.ASC"this way sudo executes a shell that executes the previous command in the root-privileged shell without any mor

Server provides standard time for clients–NTP client need to maintain communication with NTP server?????? package, configuration, service?? One, the server, the Linux system on a software? ? NTP time synchronization server, classroom? ?? II. client server, installing client software?? RHEL7 Client's School Time service– Package: Chrony– Configuration file:/etc/chrony.conf–

?[Email protected] ~]# lvcreate-l 50-n test? myvg[[email protected] ~]# LVS################################################### ?Managing Swap Space? Equivalent to virtual memory,– Use disk space to simulate memory when physical memory is not sufficient– To some extent alleviate the problem of low memory– Swap partition: Swap space acting as an idle partition[Email protected] ~]# MKSWAP/DEV/VDC5? #格式化SWAP命令[Email protected] ~]# swapon-s????? #查看SWAP状态[Email protected] ~]# SWAPON/DEV/VDC5? #启用交换空间

Linux: 10 commands save time for the system administratorAlthough the Linux desktop has undergone significant changes over the past two decades (for example, the Ubuntu Unity Interface), the command line operation mode is always a measure of the capabilities of a system development or maintenance personnel, most of the

Two methods:1. Using the Pkill command1.1 Viewing the currently connected user through who or WFor example:WUSER TTY from [email protected] IDLE jcpu PCPUJjony pts/0 xxx.xxx.xxx.xxx 00:10 0.00s 0.03s 0.01s WRoot pts/1 xxx.xxx.xxx.xxx 00:20 1:25 0.34s 0.34s-bashOver here:What parameter reflects the program that the user is running. If the user is executing a program, the name of the program is displayed here, and if you are performing a generic text-mode command, the user environment name is disp

powerful as the KDE System Guard, the basic information it provides is very useful for getting started users.* Displays a variety of basic information about computer hardware and software.* Linux kernel version* Gnome Version* Hardware* Installed Memory* Processor and its speed* System Status* The currently available hard disk space* Process* Memory and swap spa

environment variables. Did you use it now?sudo provides secure elevation of privilege when we want to run important tasks. Among Ubuntu users, it may be the most widely used and most powerful command, as it has become the preferred method in this release. Since you have so much power, be sure to be safe when you run your commands! There is no su-undo in the world to revoke orders!Original: http://blog.linuxacademy.com/linux/

? Bootproto=none???? #手动配置? Onboot=yes?????? #每次开机自动启用? Ipaddr0=172.25.0.11? #IP地址? Prefix0=24?????? #子网掩码? gateway0=172.25.0.254? #网u关4. Configure a permanent DNS server,/etc/resolv.conf?? in the Linux system, the configuration file content, "#" begins with the comment text??[[email protected] ~]# vim/etc/res (tab)? nameserver? 172.25.254.254##################################################True on-Machine

Windows system is quite simple, a lot of methods, but Linux has become a long-standing problem, under Windows used to QQ, to the Linux without QQ, how to do it, PRT SC sysrq key fullscreen again to cut it, you out, It's no problem learning this trick Linux.1. Open TerminalDifferent

0909 operating system tutorial understanding and understanding, linux operating system tutorial Questions: 1. What does the operating system do? 2. Why do I learn the operating

This chapter describes an important part of the standard Linux directory tree, based on FSSTND file system standards. Outlines a general approach to dividing a directory tree into several separate file systems for different purposes and given requirements. Some other methods are also explained. Background Loosely based on the Linux file

process improvement. UNIX and Linux System Administration Handbook-Walk into system management from the perspective of usage EditorOpen Source Code Editor Atom-Text editor from GitHub Brackets-Open source editor for Web design and front-end development Eclipse-IDE written in Java with extensible plug-in

upgrading ComposerComposer upgrade is not able to use our image to speed up the download, and must be connected to the Composer foreign official website of the server downloaded the upgrade files, some times it will cause the speed of the upgrade is very slow or even failure.Here's an easy way to do this:If your system already has a normal use of Composer, indicating that the system environment is complian

Windows 7 Hard Drive installation Ubuntu 14.04 Graphics tutorialPart of the installation diagram:The following installation choose the default, do not change anything ( for the Dish rookie ).Click Restart Now.If you have not done this tutorial, take a look at some of the following scenarios that may be helpful to you.Attention:(1) When you choose the device to install the boot launcher, you can select our sub -region or create a new / boot area . (