Linux

Linux system Architecture/bin binary, used for all users. Executable files, user commands, related to system startup/sbin system binaries, only administrators use. Management commands, which are related to the system's own startup./boot and system

After I installed RedHat Linux 5, in the terminal to use some commands, such as: Ifcinfig to view the IP of the machine, found unable to use this command, prompted to say "command not found", what should I do? Think of the environment variable is

1 File Menu items1 Open file 2 close closes file for current operation 3save file for current operation 4 Save buffer as saved as 5split window splitter windows, simultaneous operation of different files 6 upsplit window to

CP command: CP filename1 filename2cp-r directory1 directory2cp-rv directory1 Directory2 (can show progress) MV command mv filename1 filename 2 (if the command renames the file in the same directory) MV filename directory/ mv filename

chmod [options] mode filesThis feature can only be used by a file owner or a privileged user to change the file access mode. Mode can be expressed in digital form or in the form of who opcode permission. Who is optional and the default is a (all

1.7 Operating levels under Linux0 System shutdown mode, the system default operation level cannot be set to 0, otherwise it will not start normally, the machine shuts down.1 single-user mode, root privilege, for system maintenance, prohibit remote

1. Pipeline command: line command with a "|" Indicates that the pipeline command can only handle the standard output information that is transmitted by the previous instruction, that is, the stdoutput information, and there is no direct processing

Screen: Ctrl + Alt + D shows desktop/desktop minimize/restore win+d under Desktop ==windows Ctrl + Alt + L (L) win+l under lock screen ==windows ALT + F2 input command to run Win+r under ==windows Alt +tab switching between different work

UnixThe predecessor of Unix was Multics, and Bell Labs was involved in the development of the operating system, but because of the slow pace of development, Bell Labs decided to abandon the plan. Bell Labs engineers, Thompson and Ricky, developed

Temporary Open coredumpecho "core.%e.%p" >/proc/sys/kernel/core_patternUlimit-c Unlimitedpercent of a single% characterProcess ID of the%p dump processThe actual user ID of the%u dump process%g The actual group ID of the dump process%s causes the

Transferred from: http://www.jb51.net/linux/sudo.htm——————————————————————————————————Name: sudoUsage rights: Users who are present in the/etc/sudoersHow to use: sudo-vSudo-hSudo-lSudo-vSudo-kSudo-sSudo-hsudo [-b] [-P prompt] [-u

Introduction of environment variable fileTransferred from: http://blog.csdn.net/cscmaker/article/details/7261921Environment variables in Linux include system-level and user-level, system-level environment variables are system variables to be read by

\d: #代表日期, formatted as weekday month date, for example: "Mon 1" \h: #完整的主机名称. \h: #仅取主机的第一个名字, as in the example above, Fc4,.linux is omitted \ t: #显示时间为24小时格式, such as: HH:MM:SS \ t: #显示时间为12小时格式 \a: #显示时间为24小时格式: hh:mm \u: #当前用户的 Account name \v:

1. test for a desktop before you install 2. EstablishYumsource File 3. mount the disc (/rhelCreate Yourself) 4. UseYum Listcheck it out and make sure OhRepoThe file is configured correctly

1. the client boots from the network as follows 2. CopyVESAMENU.C32file to solve the above problem 3.          client starts again 4.          Select the

If your iptables basic knowledge is not yet known, it is recommended to take a look first.Start ConfigurationLet's configure a firewall for the filter table.(1) Check the setting of this institution in Iptables[email protected] ~]# iptables-l-NChain

1. Installation: Yum Install tftp-server–y 2. ConfigurationTFTPFile OpenTFTPfunction 3. turn on dependent services xinetd 4. installation Syslinux 5. will bepxelinux.0files are placed inTftpbootdirectory under 6.         

CentOS running level and Boot Process Linux running level: 1) 0: Shutdown 2) 1. Single User 3) 2. There is no network service in the multi-user status 4) 3. Multi-User Network Services 5) 4. The system is not used and reserved for the user. 6) 5.

Management Terminal interface of CentOSI. Introduction By default, CentOS6.2 opens six consoles and a graphical interface. Switching and management operations on them can greatly improve work efficiency. Opening multiple graphical interfaces is also

Burn a CD-Rom under CentOS It is very easy to burn a CD in linux. Just enter the following command in the terminal window: Cdrecord-v-eject speed = 8dev =/dev/cdwriter driveropts = burnfree test. iso Cdrecord software is generally available in the