Linux

1. Generate public key, secret key$ ssh-keygen-t Dsa-p "-F ~/.SSH/ID_DSA$ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys2. Modify Key Permissionschmod ~/.ssh/authorized_keys3. Modify the SSH configuration fileSu---Login to the root user to modify

Manually add a user Nokia, specify the default shell is/bin/bash, home directory is/home/inokia, the password is valid for 10 days, the password expires 3 days before the warning, after 2 days after the expiration of the password can not be signed

Analysis and storage log (ii)1. Find Events by JournalctlThe SYSTEMD log stores the log data in a structured binary file with indexes. This data contains additional information related to log events. In Red Hat 7, the SYSTEMD log is stored by

Grep-I is case insensitive--color Adding colorsAlias Grep=grep ' grep--color-V displays rows that are not matched by the pattern-O displays only strings that are matched by the patternReview:* Any character of any length？ Any single character[]

Rsync and find is the Linux system comes with the command, if not installed can find the system installation disk or ISO file, there is a RPM package, install it. The concrete idea is as follows: 1) can realize the timing of rsync. The System timer

There are several ways to start a Linux service, and sometimes it is not possible to use the Chkconfig command to run level settings and NTSYSV graphics run level settings, which can effectively resolve the problem.Production environment:OS: CentOS

Ps-ef|grep Java to view the programs that Tomcat runsNetstat-nltp|grep 8300 Viewing port usageNetstat-ano|findstr Windows View Port usageList to remove duplicate elementsfor (int i = 0; i i; j--) //Inner loop is the number of times the outer loop

Ssh connection persistence and reuse in Linux1. MaintainUsing a terminal to log on to the remote development machine coding should be the work of most programmers year after year, but the tragedy is that ghost will cut off your instant chat with the

Install mysql and linuxmysql in Linux Install mysql in Linux -- @ Liang WP Abstract: Install mysql in Linux.   1. Download mysql 1. Search for mysql in Baidu. One of the results is marked with MySQL Downloads. Click to go To the mysql official

Install jdk in Linux and linuxjdk Install jdk in Linux -- @ Liang WP Abstract: Install jdk in Linux.   1. Download jdk 1. Search for jdk in Baidu and see the first result with the word "Java SE-Downloads | Oracle". Click to go to the official java

Use Libreoffice in UbuntuUse Libreofficestep 1 in Ubuntu Students with English dregs. Or you may not be able to start with a bunch of professional words in the function bar.You need a Chinese packageYou don't have to go to the official website.

Differences between three network connections in VMware1. Overview After the virtual machine is installed, two virtual NICs, VMnet1 and VMnet8, are installed by default. VMnet1 is the host Nic used to connect to the network in the host mode. VMnet8

Android Application Development: Genymotion cannot be started After the Virtual Box, Genymotion, and Genymotion plug-ins on Android Studio are installed, the Genymotion Android simulator cannot be connected to the Virtual Box, this is often caused

Ubuntu 14.04 environment variable Modification Ubuntu 14.04 environment variable Modification The command cannot be found during development and compilation, because the path is added to the environment variable, how to set the environment variable,

How to configure Git and Git File status in Android Studio The configuration of Git in Android Studio is relatively simple, and various problems may occur in the middle. If you want to know or are interested, please read it down. Download the Git

Introduction to Linux kernel engineering-Network: Filter (LSF, BPF, eBPF)Overview LSF (Linux socket filter) originated from BPF (Berkeley Packet Filter), which has the same basic architecture but is easier to use. The BPF in LSF was first cBPF

Linux LVM logical volume, linuxlvm LogicOverview LVM is generated because the traditional partitions cannot be expanded online once the partitions are well organized. There are also some tools that can expand the space online, but still face the

How to compile a java project using shell scriptsCompiling java projects generally uses IDE or Ant, Maven, and other tools directly. Few people use pure shell to compile java projects. This is exactly the case. Use this blog post to record it.Case:

How to use http proxy for wget and curl in LinuxLet's take a look at how wget and curl in Linux use http proxy.Wget-e "http_proxy = porxyhost: port" www.baidu.comCurl-x proxyhost: port www.baidu.comIf you need a user name and password, the format

Tomcat startup Methods Tomcat can be started in two scenarios: Start at deployment and start at development. The war package is basically used to start the deployment, and there are various startup methods during development. The following describes