Category：Linux
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Time：2019-10-24
Methods to control account expiration under Linux: The enterprise generally gives the unmanaged role account or the developer temporary demand and so on May set the account expiration date, enhances the security! Method 1: when adding usersuseradd oldboy -e 01/28/12 Or modify the following file parameters: [[email protected] skel]# grep EXPIRE /etc/default/useradd EXPIRE= Example […]
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Time：2019-10-24
Experimental notes on centos rescue model 1, first in the BIOS boot options to set the DVD drive boot or USB boot is also possible 2. Select “Rescue installed system” from the option that appears after the CD startup and press enter to confirm. 3, language selection, here we can choose the default, because it […]
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Time：2019-10-23
Basic introduction of authority: RWX permission details: RWX works on files: [r] : stands for readable, and can be read and viewed [w] : represents writable and can be modified, but does not mean that the file can be deleted. The prerequisite for deleting a file is to have write permission to the directory […]
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Time：2019-10-23
preface This article mainly introduces you to use Shell script loop to read each line of the file, share out for your reference, the following words do not say, let’s have a look at the detailed introduction. 1. Use a for loop for line in `cat filename` do echo $line done or for line in […]
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Time：2019-10-23
spf13-vimIs a cross-platform andVIM plug-inAnd various resourcesVim，gVimandMacVimIs highly customizable. It is available on Linux, Windows and MacOS X systems and other unix-like systemsvimThe traditional feel, as it provides today’s features, such as plug-in management systems, auto-completion, tagging, and so on. Recommended reading:Learn about the vi/vim editor – a beginner’s guide Notable plug-ins provided under spf13-vim […]
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Time：2019-10-23
Linux crontab function syntax If you want to visit a website every 3 minutes, you can use: crontab -e Then type the following command: */3 * * * * curl http://www.baidu.com Where */3 means access every 3 minutes. Curl returns the content of HTTP (HTML) to the output.
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Time：2019-10-22
There are three ways to set grub password: I. set clear text password Edit grub configuration file ා VI / etc / grub.conf After opening, enter in the next line of hidden menu password=123456 Save and exit, enter the startup page after restart, press enter to enter the system startup menu, and press p to […]
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Time：2019-10-21
First, inStructure termsBasic configuration of serial port (such asBaud rate setting, check bit and stop bit setting And so on. （One）： struct termios //The setting of serial port is mainly settingMembers of struct termios { tcflag_t c_iflag; //input mode flags Enter the mode flag. tcflag_t c_oflag; //output mode flags Output mode flag tcflag_t c_cflag; //control mode flags Control mode flag tcflag_t c_lflag; //local mode flags Local mode flag. cc_t c_line; […]
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Time：2019-10-21
The make command under Linux is one of the most frequently used commands by system administrators and programmers. Administrators use it to compile and install many open source tools through the command line, and programmers use it to manage their large and complex project compilation problems. In this article, we will use some examples to […]
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Time：2019-10-21
Echo command of Linux is very commonly used in shell programming. It is also often used when printing the variable value under the terminal. Therefore, it is necessary to understand the usage of echo. The function of echo command is to display a paragraph of text on the display, which generally plays a role of […]
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Time：2019-10-21
Test version: CentOS 6.6 To edit the startup grub profile: #VI / boot / grub / grub.conf or / etc / grub.conf soft connect files. The contents of the two files are the same. Delete the “rhgb” at the end of the kernel line to save and exit. Restart after deletion will not display the […]
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Time：2019-10-20
Catalog Cacti + Nagios monitoring deployment steps… 2 I. cacti installation… 2 1 dependent packages to install:… 2 2 install RRDTOOL 2 3 start database and httpd service… 3 4 write servername and IP to hosts 3 5 install cacti 3 6 create cacti database and authorize:… 3 7 importing cacti’s data table… 3 […]
