Linux

Shortcut keys under the command line:DeleteCTRL + D deletes the character at the cursor location equivalent to VIM x or DLCTRL + H deletes the character in front of the cursor, which corresponds to the HX or DH in vim.Ctrl + K Delete all characters

I. The principle of communication between processesInter-process Exchange data must be through the kernel, a buffer in the kernel, process 1 to copy the data space to the kernel buffer, process 2 and then read the data from the kernel buffer. This

Http://www.cppblog.com/wolf/articles/74928.htmlHttp://www.cppblog.com/wolf/articles/77828.htmlHttp://www.jb51.net/article/34990.htmMost of the content copied from the above article.1 Classification of librariesDepending on the link period, the

Linux under Rights Management details Chown command: Change file owner (owner)Format: chown [option] User name file (can be modified with multiple files)Option:-R for all documents in the document and in the catalogue--reference=/path

Linux under Bash configuration fileConfiguration file for 1.bash:Global configuration:/etc/profile,/etc/profile.d/*.sh,/ETC/BASHRCPersonal configuration: ~/.bash_profile, ~/.BASHRCFile for Profile class:Setting environment variablesRun a command or

Everything is a documentAll the devices in Linux are treated as a file, including our IO devices, and in general, they are placed in the/dev directoryEg:ide HDD/dev/hd[a-p] (A-p is its number)Disk partition TableA. master boot partition MBR: Install

Turn ON/offsudo ufw allow|deny [service]Open or close a port, for example:sudo UFW allow SMTP allows all external IPs to access native 25/TCP (SMTP) portssudo ufw allow 22/tcp allows all external IPs to access the native 22/tcp (SSH) port This is

Go to the Linux root (i.e. "/", the entry for the Linux filesystem, and the directory at the top level), run the "ls–l" command and you can see that the Linux system contains the following directories.1. /binContains basic commands, such as LS, CP,

Crontab (the full Name Cron Table Schedule Task List) is a tool that is used for periodic execution.Related directives:Usagecrontab [-u user] Filecrontab [- u user ] [-i] {-e |-l |-r} #可以指定编辑哪个用户的crontab without specifying the default current

Zabbix and zabbix Based on the Environment configured in the previous article, the following describes how to execute remote commands on zabbix agent. Remote commands are subject to some restrictions: (1) The following sudu rules must be defined for

Linux ~ Common commands: Linux ~ Common commands Uncle learns Linux for the purpose of deploying services on it, such as redis, mongodb, fastDFS, cat, docker, mysql, and nginx. The following command is used to learn the mysterious operating

Linux file descriptors and redirection, operators and redirectionIntroduction The file descriptor is an integer associated with the file input and output. When writing a script, the standard file descriptor is often used to redirect the content to

Role of Linux pipelines-Use of pipeline commands in scripts Most administrative files in UNIX are simple text files that can be edited, printed, and read without special file-specific tools. Most of these files are stored in the Standard

Analysis of mmap memory ing mechanism in Linux When talking about the concept of file ing, it is inevitable that virtual memory (SVR 4 VM) is involved. In fact,File ing is the central concept of virtual storage.On the one hand, file ing provides

Linux Command details (2)-mv File Location:Mv:/bin/mv/usr/share/man/man1/mv.1.gz Name:Mv-move (rename) files Usage:Mv [OPTION]... [-T] SOURCE DESTMv [OPTION]... SOURCE... DIRECTORYMv [OPTION]...-t directory source... Description:Rename the SOURCE

Linux commands (1)-lsFile Location:Ls:/bin/ls/usr/share/man/man1/ls.1.gzName:Ls = list directory contentsUsage:Ls [OPTION]... [FILE]...Description:List Files in the directory (the current directory by default ). If the-cftuvSUX or-sort parameter is

Rsyslog + loganalyzer System Log Analysis System (basic)Rsyslog + loganalyzer System Log Analysis System (basic) Okay. First, describe it. I wanted to analyze the system logs. However, I did not expect to find that my requirements are a little high.

Install Python3.5.0 on CentOS7 and the old version Python2.7.5 coexist. On CentOS7, install Python3.5.0 and the old version Python2.7.5 to solve the problem.Current version [bkjia@localhost ~]$ python -VPython 2.7.5Installation instructions We must

Install the PDF Reader Evince in Ubuntu Evince is a lightweight Document Reader installed by default in Gnome desktop environments. It also supports multiple document formats, including PDF, Postscript, tiff, XPS, djvu, and dvi. The main

Hard Disk partitioning for Linux and Windows systems In Windows, hard disks are expressed by disk 0 and Disk 1, indicating the first and second hard disks, and then partitioned on disk 0, drive letters, such as drive C and drive D, are used for