Linux

The following is an example of a 3-type server Certificate installation method:1. Apache 2.x certificate Deployment 1.1 get CertificateGet the certificate file 1_ROOT_BUNDLE.CRT,2_WWW.DOMAIN.COM_CERT.CRT and the private key file 3_www.domain.com.key

ObjectiveMerge two empty hard drives into a "piece" and mount it to the specified directory to achieve the effect of using 2 hard drives in one directory for all space.ConditionsHDD 1/dev/sdbHDD 2/DEV/SDCMethodCreate PVPVCREATE/DEV/SDB//HDD

Tag: Perform operation SHU length exp name Configure environment variable $path pathAs a Java developer, installing some development tools under Linux is an essential skill, and this article takes the installation JDK as an example, detailing each

This article is about how to secure a backup, here is how the master server pushes the data for backup.One, backup server configuration rsync file vi/etc/rsyncd.conf#工作中指定用户 (can not be specified as 0) uid = 0gid = 0# is equivalent to a black hole.

1. Set-e"Exit immediately if a simple command exits with a Non-zero status."When this option was on, if a simple command fails for any of the reasons listed in consequences of Shell Errors or returns An exit status value >0, and was not part of the

There are three major features of cat:1. Display the entire file at once. $ cat FileName2. Create a file from the keyboard. $ cat > FileNameOnly new files can be created and existing files cannot be edited.3. Merge several files into one file: $cat

Tag: Use the number family font else to manipulate the line-wrap output rangeI. AWK syntaxawk [options] ' commands ' filesOption-F defines the field delimiter, and the default delimiter is a contiguous space or tabDefine the interval symbol using

Our firewall default rules are as follows:If the firewall releases the port but still cannot access it, it may be because the rule is added with the IPTABLES-A option, so that the added rule is arranged after the 6th rule, although the service

Three barriers for technician growth:The ancients succeeded in the three sentences, the ancient people to become major events, the need to go through the triple State:First goal: Find the direction, set the targetThe second goal: tireless, support

Build a Java development environment (two types of installation tar packages or RPM packages)The first step is to install the jdk!Download the tar package (or RPM package) to ~/download on the Oracle websiteThe second part of the download file to be

1. View memory Information free[email protected] script]# free all used free shared buffers cachedmem: 3920488 585108 3335380 188 144312 219976-/+ buffers/cache: 220820 3699668Swap: 6143996

Grub Troubleshooting General TroubleshootingMBR446 byte overwrite cannot start650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/8F/13/wKioL1jTNZHD0aU8AAAnzbkBHpg948.png "title=" Picture 1.png "alt=" Wkiol1jtnzhd0au8aaanzbkbhpg948.png "/>

Sometimes we need a command, but it is not installed, and the package name that provides the command also differs greatly from the command name by directly locating the command name without finding the package, such as rexec.At this point, we need a

Tag: Nic converged nic Bond #!/bin/bash#by:cai# Modify the System language pack to ZH_CN. utf-8  changed into ZH_CN. gb18030# input command: such as vi  /etc/sysconfig/i18n  (note that you must restart the system after the change) sed -i -e  ' s/^/#

A. zipPath:/usr/bin/zipUsage:001. Compressing files[Email protected] ~]# zip myfile.zip myfile002. Compressing the Directory[Email protected] ~]# zip-r mydirectories.zip directories003. Unzip[Email protected] ~]# unzip Myfile.zipTwo.

003day -- Common commands for linux User Permissions, 003day -- linux I. useradd Command Options: -U: User's UID useradd-u 1024 mu # The UID of the specified mu is 1024 -G: Specify the user group useradd-g jack mu # specify the mu group as jack -D:

Linux awk sed R script python script input variable, awkpython Sed input variable: 1 chrI = "chr2"; sed-n "/$ chrI/p" clippointpos.csv # The variable is represented by $ var. Change the single quotes of sed into double quotes. Awk input variables: 1

Build your own linino system to compile your own linino system, ownlinino If you are a lazy cancer hacker, simply write the process first, and then you have time to make up the reasons for each step. If there is a bug, please leave a message and I

Basic Linux-metacharacters and basic linux characters The special characters in Bash have special meanings on the keyboard:The metacharacters are interpreted by shell. 1. ''. Obtain the command execution result. [Root @ MiWiFi-R3-srv ~] # Ls4. txt

RHEL 7 basic configuration and rhel basic configuration1. Modify the running level View the running level: [Root @ rhel7Oracle ~] # Systemctl get-defaultGraphical.tar get [Root @ rhel7Oracle ~] # RunlevelN 3 Modify the running level: