duties of linux administrator

Article title: Linux Network Administrator Manual (2 ). 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 2 TCP/IP network problems We will go to discuss some of the details y

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– System Services: Chronyd[Email protected] ~]# rpm-q chronyChrony-1.29.1-1.el7.

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 Linux masters we understand are operating in

Previous ArticleArticleThe simple implementation of Linux allows common users to execute administrator commands. That is to say, you can execute commands that can only be executed with sudo without entering the password, now we want this command to be executed at startup and before the user logs on. First, create a Python script based on the above article. Assume that the

Linux+shell Administrator's Good helper--batch decompressionRecently, the company has been busy with OA on-line work, as an administrator, it is necessary to provide them with data backup and recovery operations, the main operation is to restore the production environment change data to the test machine for testing. Of course, some of the previous articles have also introduced to the use of shell scripts to

Although Linux desktop has undergone major changes over the past two decades, the most significant change may be the Ubuntu Unity interface.) based on the strength that can be provided to experienced system administrators, the command line is still non-parallel. Although most of the next 10 tips are about Bash shell, all these skills can be easily applied to other current shells. 1. Use a command to create and enter the Directory Creating and entering

Restore the MySQL administrator password in Linux 1. Send the kill command to the mysqld server to disable the mysqld server (not kill-9). files storing process IDs are usually stored in the directory/var/lib/MYSQL of the mysql database. # Killall-TERM mysqld 2. Use the -- skip-grant-tables parameter to start mysqld. #/Usr/bin/safe_mysqld -- skip-grant-tables Paths may not be the same. You can use loca

Ubuntu input su input password hint su:authentication failure problem Resolution:sudo passwdpassword: Your current password enter New UNIX Password: This is the root password retype New UNIX Password: duplicate root password Then you will be prompted for successful information. NBSP; In the note, using Su and sudo is different, using the SU Switch user needs to enter the user's password to switch to, while using sudo is the current user's password.If a small black box appears, it is a la

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

"Sudo" is a very useful tool on the Unix/linux platform that allows system administrators to assign some reasonable "rights" to ordinary users to perform tasks that only superuser or other privileged users can accomplish, such as running some commands like MOUNT,HALT,SU. , or edit some system configuration files, such as/etc/mtab,/etc/samba/smb.conf. This has not only reduced the number of logins and administrative time of the root user, but also impr

installation of Linux hosts and use of VMware, Xmanager. 1) Linux Installation documentation 2) Vmware Workstation install Linux 3) Xmanager Use the document Annex Section III: Start the Linux system with help and switch and basic operational knowledge. 1) Small operation: Restart X-window:alt+ctrl

Linux Systems-User Management-Administrator authorization The root privilege of a Linux normal user 1 often used to manage some services need some permissions, you can edit in the Visudo User name Host address = absolute path (to restrict permissions so that users can execute the program only under these paths, without root privileges) 2 can be used for Web site

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 space* Network Utilization* File System* All mounted file systems and their basic information

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/

Linux system use version: CentOS 6.61, boot into the boot interface after pressing E or ENTER, enter the GRUB boot menu, such as;2, press E to enter the editing mode, the upper and lower key moves to switch to line 2nd kernel this line;3. Press E to enter kernel Edit command line, for example, in the cursor space and then enter single or S or 1Press ENTER when finished, save to return to the previous boot menu, press B to start the system4, start the

Tags:/etc/cert verify gid account dir minus Echo archive1 Case 1:linux Administrator Comprehensive test1.1 QuestionsComplete all the practice cases according to the practice steps provided in this article.1.2 SolutionsBefore you begin the exercise, reset the virtual machine environment in turn.[[emailprotected] ~]# rht-vmctl reset cla***oom[[emailprotected] ~]# rht-vmctl reset server1.3 StepsThe impleme

? 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 completion1. Restart Nfs-server Shared Servi