Linux

Command: Su[options] Username-,-l,--login:make Shell as login shell, which makes a shell a login shell, such as executing Su-pzhang, indicates that the user wants to change the identity to become Pzhang, and uses the Pzhang user's environment

Login generated verification code when using the Monaco.ttf font, without the installation of fonts, will error: can ' t open resourceThe way Linux installs fonts is actually very simple, which is to callFc-cache-f-Vcommand, in fact we can just call

Question: What does the field mean in the segment descriptor?Information such as linear address/offset/granularity/privilege limit for the first address of the segment.1, quick access to segment descriptorsWhen the segment selector is loaded, the

Disk partitioning uses the partition editor (partition editor) to divide several logical parts on disk. Once the disc is divided into several partitions (partition), the non-homogeneous directory files can be stored in different partitions.At the

1. Command format:Less [parameter] file2. Command function:Less is similar to more, but you can browse files at will with less, and more can only move forward, but not backwards, and no will load the entire file before viewing it.3. Command

Recently looking at the basic knowledge of Linux programming, intends to do some of the more interesting knowledge to do some summary memo, this article revolves around Fpic, learning reference at the end of the text. In a Linux system, a

The-linux system does not differentiate file types with file suffix names.#详解 (Pending completion)-linux systems are case sensitiveA quick way to toggle case is to press SHIFT and letter keys at the same time-If you are installing dual systems for

Reference: http://www.cnblogs.com/liqingdong/p/7346100.html1, service iptables status--View server firewall status2, Vi/etc/sysconfig/iptables--Edit firewall rules3, service iptables restart (start,stop)--Restart (start, stop) server firewall4,

# default Comment source image to improve apt update speed, if necessary, can be self-uncomment Deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial main restricted Universe Multiverse Deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/xenial

Do the program from the start can be written into the startup script start-up script or into a service, this way to write boot scriptVi/etc/rc.localJoin the startup scriptZK joins power-on self-start/opt/zookeeper-3.4.6/bin/zkserver.sh

Main content: What is a system call Principle of system call implementation on Linux Implementation of a simple system call 1. What is a system callSimply put, a system call is a bridge between a user program and a hardware

Tag: Represents a statement a user Xferlog time to transfer a TMP wordDelete file command:Find corresponding directory-mtime + days-name "file name"-exec rm-rf {} \;Instance command:find/opt/soft/log/-mtime +30-name "*.log"-exec rm-rf {} \;find/home/

1, without root login management system, and as a normal user login, through sudo authorization management.2, change the default remote connection SSH server port, prohibit the root user to connect remotely, or even change the SSH service only

Important Environment variablesThere are many environment variables in the Linux system, we can use Env to view hisVariables are made up of fixed "variable names" and user-defined "variable values". Variable name Role

The find command can quickly find a file within a specified range, using the basic syntax:Find "OPTION" "Path ...." "Expression"Such as$find/etc/ -name init.d -type d-printThe meaning of the above command is to look for a file named INIT.D in the

1. Download the websitehttp://maven.apache.org/download.cgi2. DecompressionTar zxvf apache-maven-3.5.0-bin.tar.gz3. Copy to the/usr/local/directoryCp-r apache-maven-3.5.0/usr/local/maven3.5.04, configuration, so that it can be used in any place MVN

Environment variable,In layman's terms, environment variables are used to tell the computer (actually the operating system) A few directories. These directories store several execution files, such as the/usr/bin directory shown above. Most of the

Shell parses the command line process and eval command, shelleval This article describes how to process a linux Command during execution? And the general sequence of these processes.1.1 shell parsing command line The general procedure of shell

Analysis of scale-up sub-Statement: 5. Species annotation OTU table operation, species otuThis course, first, complete the operations before the "Analysis and Interpretation of amplification" Series 1 Quality Control Experiment Design Dual-ended

Nf_conntrack solution, nf_conntrack1. symptom The following information appears in/var/log/message: Dec 8 11:22:29 product08 kernel: nf_conntrack: table full, dropping packet.Dec 8 11:22:29 product08 kernel: nf_conntrack: table full, dropping