duties of linux administrator

+--------------------+| Database |+--------------------+| Information_schema || Test |+--------------------+2 rows in Set (0.00 sec)permission settings Grant: GRANT privileges on [object_type] db.* to ' username ' @ ' host '; #指定权限PRIVILEGES on Specifies the object name db.* object_type Specifies the object type to [email protected] The specified user. object_type object types are: Table (table) function (function) PROCEDURE (program, library)Usage:GRANT EXECUTE on FUNCTION db.abc to ' username

?[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

Centos7/rhel7 into the single user mode and reset password mode has changed significantly, grub from B to boot into ctrl+x boot.There are two ways to reset passwords, Rd.break and init.Rd.break Method:1, start the time, in the Start screen, the corresponding startup item, the kernel name on the "E";2, enter, find linux16 beginning place, press "End" key to the last, enter Rd.break, press ctrl+x enter;3, enter after the command mount, found root for/sysroot/, and can not write, only ro=readonly p

test whether your domain Name system is working properly. Domain Name server (DNS) helps resolve URLs to a set of application servers. However, you will find that some URLs cannot be parsed, which can lead to application connectivity issues. For example, suppose you try to access your database from the host of the application. You receive a "Cannot parse" error. To troubleshoot, you try to use the Dig (DNS query tool) or nslookup (query Internet name server) to determine why your application se

and outbound traffic. You can install it using the following method:Yum Install nloadOrsudo apt-get install nloadSmokeping.Smokeping can keep track of your network latency and visualize them. There are various delay measurement plugins developed for the smokeping. If the graphical user interface is important to you, there is now a plug-in being developed to implement this functionality.Mobaxterm.If you're working in a Windows environment all day. You may feel the limitations of Windows under th

Article title: Linux Network Administrator Manual (3 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Chapter 3 Configure network hardware 3.1 devices, drivers, etc. Till now, we

/]:[http://sebastien.godard.pagesperso-orange.fr/]:[http://goaccess.io/]:[[]: http://whowatch.sourceforge.net/[http://www.webmin.com/]:[Https://github.com/opsengine/cpulimit]:[https://www.serverdensity.com/server-monitoring/]:[http://www.opennms.org/]:[http://sysusage.darold.net/]:[Up]: http://www.pcp.io/[Https://userbase.kde.org/KSysGuard]:[+]: http://munin-monitoring.org/[http://www.nagios.org/]:[http://www.zenoss.com/]:[http://www.cacti.net/]:[[i]: http://www.zabbix.com/[https://collectd.org/

apacherootme . Modify for the version, and then restart. If you don't succeed, you'll be miserable ... 23#_evil (Popular science is a kind of commonweal behavior) | 2015-09-27 10:05The NFS format can also be a .... mof for personal computer, but not to ensure the avoidance of killing. The traditional operation of PowerShell is sufficient. 24#_evil (Popular science is a kind of commonweal behavior) | 2015-09-27 10:17 Linux: kernel code will

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 password, don't worry, take the

Article title: Linux Network Administrator Manual (12 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Chapter 4 management of Taylor UUCP 12.1 Historical Review UUCP was designed

: Poweroff[Email protected] ~]# PoweroffRestart: reboot[email protected] ~]# reboot#####################################################Add:Fill key: Tab[[email protected] ~]# IFCO (tab)[[Email protected] ~]# if (two tabs in a row)# Cat/et (tab)/red (tab)-R (tab)# Ls/et (tab)/sysco (tab)/NETW (tab)-(tab)/IFC (tab)-E (tab)###################################################View Text file contentsCat: Small FileLess: Large files Press Q to exitView text File part contentHead-3/etc/passwd #显示头多少行Tai

Article title: Linux Network Administrator Manual (8 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Chapter 8 point-to-Point Protocol 8.1 uncover P letters Like SLIP, PPP is a p

visualize inbound and outbound traffic. You can install it using the following method:yum install nloadOrsudo apt-get install nloadSmokeping.Smokeping can keep track of your network latency and visualize them. There are various delay measurement plugins developed for the smokeping. If the graphical user interface is important to you, there is now a plug-in being developed to implement this functionality.Mobaxterm.If you're working in a Windows environment all day. You may feel the limitations o

We have read many tutorials and many videos. You are now a Linux advanced user. Okay. Congratulations. But there are still some things to learn! The following commands will be used when you become an all-powerful administrator! Ifconfig: when modifying the existing network interfaces in the kernel, you will use the ifconfig command. This command is usually used for system tuning and debugging, but can al

command is used to send messages to all logged-in users. You can send messages only to users whose message permissions have been set to ' yes '. The message is given as a parameter to the Wall command. MESG: The user can use the ' write ' command to send you a message. But as a server administrator, you can use the MESG command to determine whether they are able to use the write command. You can choose ' n ' and ' Y ', respectively, to control not

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 information for observing system activities and

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

Article title: Linux Network Administrator Manual (14 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Chapter 4 configure and run smail This chapter will give you a quick start t

Article title: Linux Network Administrator Manual (7 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Chapter 7 serial line IP The serial line protocol SLIP and PPP provide Intern

Tags: linux operations computer network Dahne Red Hat Linux system operationsecurity-enhanced Linux (SElinux)– United States NSA National Security Agency-led development, a set of mandatory access control systems to enhance Linux system securityPurpose: Mandatory access control system– integrated into the