Linux

Su-#su-lyyExecuting this command means switching to the LYY user and re-reading the user environment-related configuration file, specifically executing the current user home directory. Bash_profile and. bashrc files, this we become full switch.Su#su

1.PS-EF:-e Displays all processes running on the system,-f displays some useful information columnsUID: The user responsible for initiating the processPID: ID of the processPPID: PID of the parent process (a process started by another process)C:

1. View the entire fileCat mongo.sh View the contents of the script file: MONGO 172.60.0.203:27017/che001-uplatform-pplatformCat-n * *, view the contents of a file and give the number of upstream numbers, including blank linesCat-b * *, view the

Linux Shutdown Firewall command1) Permanent, no recovery after rebootOpen: Chkconfig iptables onOFF: Chkconfig iptables off2) immediate effect, recovery after restartOpen: Service iptables startClose: Service iptables stop3) When the firewall is

Linux--grep This is a very important tool, Sed,awk,grep is called the 3 swordsman of Linux!grep: Searches the text according to the pattern, and displays the line of text that conforms to the pattern.To cite an example, grammar:Example 1: #grep-i '

Any content in Linux is a fileHard disk file users are filesHardware Device file nameIDE HDD/dev/hd[a-d]SCSI/SATA/USB HDD/dev/sd[a-p]Optical drive/dev/cdrom//DEV/HDCFloppy/dev/fd[0-1]Printer/dev/lp[0-2]Printer USB

Several major phases of the "1" Linux bootStart processStart the first step --load the BIOSWhen you turn on the computer, the computer loads the BIOS information first, and the BIOS information is so important that the computer must find it at the

The operating system in the virtual machine. CentOs (no graphical interface)Without the graphical interface of Linux, I also do not configure the network, now need to copy files to the Linux system above, I use the U-disk mounted way to obtain the

Haproxy is integrated with nginx and zabbix1. Due to business requirements, some directories on the server should be exposed so that other systems can call the exposed files, however, http Services on port 80 must be provided externally. Analysis:

Never run Linux commands, never linux The commands listed in this article cannot be run, even if you are curious, unless you are running on a virtual machine (you can restore the problem ), because they will actually damage your system. Therefore,

Scheduled tasks in linux and scheduled task commands in linuxAt In windows, windows provides the task scheduling function. In the control panel- In linux, you may have discovered why the system often performs some tasks automatically? Who are

Awk (1), awkThe following information is extracted from the netstat command as an example. $ cat netstat.txtProto Recv-Q Send-Q Local-Address Foreign-Address Statetcp 0 0 0.0.0.0:3306 0.0.0.0:*

Use SHELL to import txt files of certain formats to the database through SQL LOAD, 1. Preparation: in Windows, you can directly import files through sqlload. in linux, you need software related to sqlload. 2. SQL script (MID_DFDZ.ctl) LOAD

Let's Encrypt trial In the morning, I received an email from Let's Encrypt, saying that I have already approved the application, so I will try it out immediately. Let's Encrypt is a new digital certificate authority that eliminates the complexity of

RabbitMQ installation and monitoring plug-in installation in Linux[Note that some commands not found are prompted during the installation process. Just click yum isntall.] The following is a successful test in CentOS release 6.4. RabbitMq

CentOS installation video conversion FFmpeg and cutting tool segmenter 1. Install FFmpeg in yum 1. the lazy way is to install yum and automatically resolve dependencies. However, the CentOS system does not have FFmpeg source by default, And the EPEL

How to compile the latest 32-bit Wine 1.7.53 in 64-bit Ubuntu 15.10 Wine released the latest version 1.7.53. This version brings a lot of performance improvements, including XAudio and Direct3D code cleanup, improved OLE object embedding technology,

Set the network for Linux virtual machines and implement host name ssh access To install a virtual machine, you must set the Internet access permission to use the host name for ssh remote access control. 1. Set the hostname in Linux and access the

CentOS IP Address Configuration Environment Virtual Machine: VMWare10.0.1 build-1379776 Operating System: 64-bit CentOS7 Introduction CentOS7 Minimal installation (Minimal) without the ifconfig command, which can be installed in the net-tools

Statistics on process memory and cgroup memory in Linux In the Linux kernel, there are some similarities and differences between the memory usage of processes and the memory usage statistics of Cgroup.Process Memory statistics In general, the memory