Linux

The top command is a common performance analysis tool under Linux that shows the resource usage of individual processes in the system in real time, similar to the Task Manager for Windows. Here is a detailed description of how it is used.top-01:06:48

Permissions and owners for files and folders1. chmod-r 755 File777 Meanings and Sources:777 meanings: Owner, same group user, other user7 Source: The file has three modes of operation: Read 4, Write 2, execute 1, the value is 421.For example: 777:

Important Shortcut keys: TABcommand, PATH completion1. Create a directory/dataCommand syntax: Mkdir/data2.CD Switching pathCommand syntax: CD/ The concept of relative paths: Start from the current directory instead of/start. Example:

1. View the process usage bandwidth-nethogsInstall Howto Download the latest epel-release rpm fromhttp://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm Install epel-release RPM: Install nethogs RPM Package:# yum

Vim Configuration Memo:$cat. VIMRCSet tabstop=4Set shiftwidth=4Set softtabstop=4Set ExpandtabSet AutoindentThe Set Mouse=aSet HLSSet NuSyntax onFileType plugin onLet g:pydiction_location = ' ~/.vim/bundle/pydiction/complete-dict 'Let

First, Introduction Socat is a multifunctional network tool named "Socket CAT", which can be seen as Netcat's n-fold, Socat's official website: http://www.dest-unreach.org/socat/Second, installation1) Yum InstallationYum Install -y Sccat2) Source

1. Pipeline FlowIn Linux | Symbol represents pipeline FlowUsage: Command1 | Command2The standard output of the first command will be the standard input for the second commandExample: Cat A.txt | grep "ABC"2.IO Streamstdin---Standard input stream

Linux code SVN up index/ Then find out the exact version you want to undo:Linux code SVN log--limit Index/tpl/css/global.css According to log suspected to be 16976 version changed, compare:Linux code SVN

Order for temporary effect:Set static Ip:ip addr Add 1923168.1.2/24 dev eth0Set up Gateway: IP route add default via 192.168.1.1Start a network device: IP link set dev eth0 upTo permanently modify the DNS configuration:Edit this

First understand the difference between the following procedures and processes:Program Concept:A program is a pre-programmed work execution plan to solve a information processing task, which is a sequence of basic instructions that a CPU can perform,

Overview file OperatorsA file is an important concept of the operating system. All system calls that perform I/O operations refer to the open file as a file descriptor, a non-negative integer. Can be used to represent all types of open files

1. Introduction of the processClassification of processes:Processes are generally divided into three categories: interactive process, batch process, and daemon process.Daemons are always active, usually run in the background, the daemon is usually

First, we go to the official website to download the JDK, I download the Linux x86 174.84 MB jdk-8u65-linux-i586.tar.gz Address : http://download.oracle.com/otn-pub/java/jdk/8u65-b17/jdk-8u65-linux-i586.tar.gzYou can download them using the wget

[Email protected]:~The Tree Program "tree" is not yet installed. You can use the following command to install:sudoApt-getInstallTree[email protected]:~$sudoApt-getInstalltreetree--Displays the disk directory structure Command function: Displays all

we often find a file in Linux, but do not know where to put it, you can use some of the following commands to search:whichView the location of the executable file. WhereisView the location of the file. LocateView the file location with the database.

Shell learning notes and shell scripts1. for Loop 1. Syntax format 1 For variable in value 1 value 2 value 3... do program done  Note: The program will traverse all values, assign values to variables, and then execute the program. That is to say,

ORA-01034:, ORA-01078: And LRM-00109: SolutionEnvironment: Linux 5.4 Oracle 11.2.0.3 when connecting Oracle on Linux error: SQL> show parameter sgaORA-01034: ORACLE not availableProcess ID: 0 Session ID: 0 Serial number: 0 SQL> startupORA-01078:

Linux socat command and linuxsocat command I. Introduction Socat is a multi-functional network tool named "Socket CAT". It can be seen as an enhanced version of netcat N times. The official website of socat: Http://www.dest-unreach.org/socat/  

802.11ac NIC Driver compilation on Raspberry PI 2, raspberry802.11ac Recently, I played a video on Raspberry Pi 2 for FPV. However, I found that the 2.4G controller seriously interferes with 2.4G WIFI, during the start of the control, my desktop +

Centos6.7 installing Naigos tutorial1. Install the dependency package [root@Nagios ~]# yum install -y httpd php[root@Nagios ~]# yum install -y gcc glibc glibc-common[root@Nagios ~]# yum install -y gd gd-devel[root@Nagios ~]# yum install -y perl ntp