Linux

Install Java,sql and Tomcat under Linux:1. Java JDK Configuration:See if the Jdk:rpm-qa|grep JDK is installedInstall command: RPM-IVH jdk-7u15-linux-x64.rpmView installed version: Java-versionEdit ProfileEdit command: Vi/etc/profileTo add

To view the number of physical CPUs:cat/proc/cpuinfo| grep "Physical ID" | Sort| uniq| Wc-lTo view the number of cores per CPUcat/proc/cpuinfo| grep "CPU Cores" | UniqTo view the number of logical CPUscat/proc/cpuinfo| grep "Processor" | Wc-lView

command: sed [options] Flow Editor, change file additions and deletions, three Musketeers dickParameters:-N: Cancel default outputP: (print) printinge.g. sed-n ' 20,30 ' P ett.log print ett.log 20-30 lines of contente.g. sed-n ' $ ' p ett.log print

The LS command is a simplified form of list and is one of the most commonly used commands in a Linux command, and the following are some of the common options for this command!ls without any parameters, directly list all the files in the current

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Scenario 1:Ubuntu installs GNOME3, there is an easy way to install the Ubuntu gnome distribution directly. The following is the original 16.04.02LTS based on the installation of the GNOME3 desktop environment. sudo apt-get install gnome-shellsudo

Usage of shortcut keys in Linux1.1 Common shortcut keysCTRL + A moves the cursor to the beginning of the lineCTRL + E moves the cursor to the end of the lineCTRL + C undo the current Operation =cancelCTRL + D logout command (the current row has no

Shutdown, restart, logoff in Linux1.1 Turn off the machineShutdown shut down the machineExpected hope, expectShutdown 1 A minute, turn it off.Cancel CancellationShutdown-h now shut down immediately.Shutdown-h shutdown after 100 minutesShutdown-h

Use of regular expressions1.1 Creating an environmentCat >q.txtOldboy OldboyHellooldboy HellooldboyAwkoldboy AwkoldboySedoldboy Sedoldboyoldboyedu oldboyeduEofTake out only the Oldboy linegrep "\boldboy\b" Q.txtInstance 1-1 Reverse Reference[Email

Fdisk-cu Creating a partition-------------After adding the entry, then follow the steps, first add a hard disk, size yourself, then enter the command, choose N to create the partition, then select the primary partition (P) or the extended partition (

1. Installationsudo apt-get install python-virtualenv2. UseTo create a virtual environment:virtualenv [Virtual Environment name]Example: Virtualenv python27To activate using a virtual environment:SOURCE ~/workplace/python27/bin/activateInstallation

Log in to Linux and enter the root directory "/"by default.LS can query the current directory of files and folders;The ls directory path can query files and folders under directory pathExample:ls/home the absolute path of the home directory starting

I. DescriptionMany projects need to set a certain server's timing task crontab to implement some scripting functions, so here's a summary.Environment: Linux + centos6.8Second, prepare1. Check whether the server's crontab is in server stateService

The Linux Sync command is used for data synchronization, and the Sync command is used when shutting down the Linux system.The Linux system to write to the hard disk data sometimes will be more efficient, will write to filesystem buffer, this buffer

Centos7 users, group and file permission management, and centos7 permission management If no user is created during centos7 installation, only the ROOT user is used by default. This user is an account with the highest permissions and can do anything,

Ubuntu + win10 dual systems, adjust the partition size and enter the emergency mode, ubuntuwin10 Problem Background: Ubuntu and win10 dual systems are installed, and Windows D disks are mounted under Ubuntu. Later, due to insufficient D space,

Solution for Ubuntu 16 disconnection under VMware 12 virtual machine, vmwareubuntuOpen the built-in Firefox browser to show that the connection is not connected to the Internet, and ping the terminal also shows the unkown solution: 1. open the "edit"

Transcription group entry (4): learn more about reference genome and Gene annotation, transcription genomeTask List 1. Download The hg19 reference genome from UCSC; 2. Download the gene annotation file from the gencode database, and use IGV to

The input scanf and gets of the string, and the character string scanfgets# Include # include # define N 100int main (int argc, const char * argv []) {char str1 [N]; char str2 [N]; ① scanf ("% s ", str1); ② gets (str1); printf ("% s \ n", str1);

Shell input/output redirection, shell output redirectionOutput redirection is generally achieved by inserting a specific symbol between commands. In particular, the syntax for these symbols is as follows: command1 > file1Run command1 in the