Linux

1.man "Nine Yang Martial"(a total of 9), firstMan 1: Executable program or shell command (for example: LS,CD)Man 2: System call (Kernel function)Man 3: library function (c library)Man 4: Special files (e.g., devices and drivers)Man 5: File format

Booting from Tomcat:Each boot to start Tomcat, directly modify the system files to achieve, has been practical method effective.1. Modify the script file rc.local:vim/etc/rc.d/rc.localThis script is a user-defined start-up program that can add

Document descriptor (file descriptors)/etc/security/limits.confHere is the file descriptor limit that the current user allows to open, which can be ulimit -n viewed.Modify the configuration as follows: * hard nofile 65536 root hard

1 descriptionCat's full name concatenate files and print on the standard outputA text output command under the Cat command thing Linux.Used to link files and print to standard output devices.Usually things are used to view the contents of a file

Linux first week study notes (+)2.5 . alias command alias command: alias " causes the original command to prevent special characters from causing an error. alias Unalias command: used to cancel the command alias, which is the Shell

Linux first week study notes (+)2.6 , relative and absolute paths( 1 ) . Path: is the place where a file is stored, as long as you type the path of the file system can only directly find the location of the file, so find a file needs to enter the

Linux first week study notes (a)2.3:ls Commandls–l Commands: Listing file detailsLs–i Command :  View Inode numberLS–LH command: View file sizeLs–la commands: View all files and hidden filesLs–lt command: Sort by Time orderLs–ld command: Lists only

Third Week Study Summary catalogueI. Knowledge context diagramTwo. Shell scriptsThree. Shell Login methodFour. File search and compression and tarFive. Simple SED text processingI. Knowledge context diagramTwo. Introduction to shell script 1.shell

Linux systems, when users are added using Useradd, all files in the system's/etc/skel directory are copied to the newly added user's home directory. All files in this directory are hidden files (files that begin with a. dot).By modifying, adding,

1. Edit Timed Task Informationsudo crontab-e #以root用户创建, can also-u parameterEdit the contents as follows:Frequency expressions correspond to minutes, hours, days, weeks, and months, respectively.Lang=zh_cn. UTF-8*/30 * * * *

Open Access Port commandSee if the port is open first/etc/init.d/iptables status/sbin/iptables-i input-p TCP--dport xxxx-j ACCEPT #开启xxxx端口/etc/rc.d/init.d/iptables Save #保存配置/etc/rc.d/init.d/iptables Restart #重启服务View information such as the

set up Scheduled TasksCrontab-e1 0 * * */bin/find/mnt/tomcat/logs/-mtime +3-type f-name "*.log"-EXEC/BIN/RM-RF {} \; Clear tomcat log script every morning at a time of the week Tomcat automatic backup under Linux1, the page file in

# Linux and Windows dynamic Library load path differencesAbout # #------------------------------The path to the Linux load Dynamic library is the system directory/lib and/usr/lib.-Windows Load Dynamic library path is local directory, then search

Logrotate implements Mysql slow log segmentation and logrotatemysql MySQL slow log? The slow query log of MySQL is a log record provided by MySQL. It is used to record the statements whose response time exceeds the threshold value in MySQL,

Installation Steps for Nginx in Linux Nginx is a high-performance http server/reverse proxy server and email (IMAP/POP3) proxy server.Application scenarios 1. http server. Nginx is an http service that provides http services independently. Web

Use the vi editor in linux for programming (instance description) and vi instance description For beginners of linux, if you want to program in linux, You can first use the vi editor on the terminal for programming. The following describes how to

644, 755, and 777 permissions in linux, 644777 Detailed description of linux 644, 755, and 777 Permissions Common linux File Permissions: 444 r -- 600 rw ------- 644 rw-r -- 666 rw- 700 rwx ------ 744 rwxr -- r -- 755 rwxr-xr-x 777 rwxrwxrwx From

Centos7 install jdk and configure the environment variable (yum). For details, centos7yum 1. yum search java | grep jdk 2. Select the jdk to be downloaded from the list. 3. yum install java-1.8.0-openjdk (I downloaded jdk1.8) 4. Return to the

[Ubuntu] Ubuntu sets up the Samba service and ubuntutu16.04 1. Samba Introduction Samba is a free software that implements the SMB protocol on Linux and UNIX systems. It consists of servers and client programs. Server Messages Block (SMB) is a

Tips for using the iptables command in linux: linuxiptablesTips for using the iptables command in linux: iptables advanced network Iptables commandIs a common firewall software on Linux and is part of the netfilter project. It can be configured