Three ways for CentOS 7 to create a local YUM source

Because the development environment only has local area network, some servers can't use all kinds of YUM sources on the network. It's difficult to copy rpm packages back and forth for installation, and the dependency problem has to be solved. I want to build a local / LAN YUM source in CentOS 7.3 to facilitate the installation of software with ...

Posted on Wed, 01 Apr 2020 08:51:41 -0400 by alex2046

01 "shell programming prelude" widget

1, Text processing tools 1. grep tool grep is a row filter tool; it is used to filter rows according to keywords Syntax and options Syntax: #grep [options] 'keyword' filename Common options: OPTIONS: -i: Case insensitive -v: Find rows that do not contain the specified content,Reverse s ...

Posted on Fri, 13 Mar 2020 00:18:24 -0400 by liquidmind

Application of linux basic entry system services systemctl and xinted

9. System Services 9.1 System Services Computers can be understood as a place such as Zhongguancun Street System Services can be understood as barber shops, restaurants, shopping malls and so on, each of which is a system service to provide customers with different content services Service: A program that resides in memory and provides some sys ...

Posted on Mon, 10 Feb 2020 12:45:46 -0500 by mohamdally

PXE+Kickstart unattended installation

PXE one key installation PXE(Preboot eXecute Environment) is mainly used to boot the client host to install the Linux operating system in the unattended installation system. Kickstart is an unattended installation method. Its working principle is to save the parameters that need to be filled in manually by the operation and ma ...

Posted on Thu, 02 Jan 2020 03:27:10 -0500 by asy1mpo

Learn to use vsftpd services in linux

Main points: 1. Overview of vsftpd 2. Four differences of ftp, sftp, vsftp and vsftpd 3. Anonymous users log on to ftp 4. Log on to ftp using local users 5. Set up virtual user accounts using ftp 1. Overview of vsftpd vsftpd is the abbreviation of "very secure FTP daemon", security is one of its biggest features.vsftpd is the name ...

Posted on Wed, 25 Dec 2019 12:37:20 -0500 by theverychap

Linux-Process Observation

16.1.1 Processes and Programs   Program: Usually a binary program, placed on storage media (e.g. hard disks, discs, floppy disks, tapes, etc.), which exists as a form of physical files; Process: When a program is triggered, the permissions and attributes of the executor, the program code and required data of the program are loaded into m ...

Posted on Sat, 21 Dec 2019 18:41:45 -0500 by Atiq

centos7 installation configuration vsftpd

1. installation Check if FTP is installed: RPM - qa|grep vsftpdInstall: yum -y install vsftpdchkconfig vsftpd on Start vsftpd: systemctl start vsftpd.service There are several kinds of vsftpd users: local user, virtual user and anonymous user. Active mode, passive mode: PORT active FTP mode:Command connection: client > 1024 port - > se ...

Posted on Fri, 06 Dec 2019 08:37:01 -0500 by saeeddeep

Regular expression three swordsmen and file processor in shell programming

Preface: Basic regular expression Extended regular expression How to use sed tool How to use awk tools One: regular expression I have learned the basic usage of Shell script before, and I can edit Shell script with conditional judgment, loop and other statements. Next, we will introduce a very important concept - regular expression (RE). Reg ...

Posted on Fri, 06 Dec 2019 01:25:35 -0500 by zc1

vsftp virtual user based

I. components required for online installation of vsftpd [root@k8s-node01 home]# yum -y install vsftpd* [root@k8s-node01 home]#yum -y install pam* [root@k8s-node01 home]# yum -y install db4* [root@k8s-node01 home]# yum -y install db4-utils II. Establishing virtual users [root@k8s-node01 home]#vi /etc/vsftpd/vftpuser.txt Add a virtual user n ...

Posted on Sat, 16 Nov 2019 10:11:23 -0500 by Nirvana

Regular expression and programming The Three Swordsmen (grep, sed, awk) command is detailed

Blog Outline:1. Regular expressions(1) Definition of regular expressions(2) Use of regular expressions1. Basic Regular Expressions(1) grep command tool2. Extending regular expressions2. Text Editing Processor1.grep Command Tool2.sed Command Tool3.awk Command Tool 1. Regular expressions (1) Definition of regular expressions Regular expressio ...

Posted on Sat, 09 Nov 2019 12:39:54 -0500 by Labbat