linux foundation certified system administrator

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

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–

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: 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

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

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

?[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

1. Founder of Linux operating system kernel ()A. Bill Gates B. Richard Stallman C. Linux Torvalds D. Dennis M. Ritchie2. Which of the following statements about the correct names of IDE devices in Linux are as follows ()A. SDA is the first ide controller, primary device B. SDB, and secondary deviceC. HDB second ide con

The sections below summarize some of the main tasks that administrators is expected to perform.1. Account ProvisioningThe system administrator adds accounts for new users, removes the accounts of users, is no longer active, and handles All the account-related issues this come up in between (e.g., forgotten passwords).2. Adding and removing hardware3. Performing BackupsPerforming backups is perhaps the most

enabled service 　　 By default, Linux is a powerful system that runs many services. However, many services are not required and may cause security risks. This file is/etc/inetd. conf, which defines the services to be listened to by/usr/sbin/inetd. You may only need two of them: Telnet and FTP, and other classes such as shell, login, exec, talk, NTALK, IMAP, pop-2, pop-3, finger, auth, etc. unless you reall

Sudo is a command that manages everything. It literally means "Super Users can do it !" (Super user do !) For Linux system administrators or advanced users, it is one of the most important and essential commands. You have had this experience: when you try to run a command on a terminal, but the result is "Access Denied "? This is the command you need! But the bigger the power, the greater the responsibility

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)

can be written to the/etc/rc. local file. rc. local is the script file started by the system and used by the Administrator. 7. View network conditions Nameserver is the DNS address You can use netconfig to configure the network. This is a text window tool. After configuration: I installed red hat 9 on Vmware to access the Internet. Method: Bridge:Vmnet0 is used by default.Set the ip address of the Virtu