unix and linux system administration handbook pdf

Common Linux System administration commandsWhoAmI shows the user of the current operation, such as:650) this.width=650; "src=" Http://p3.pstatp.com/large/19210001778d80f7b8c8 "alt=" Linux Learning ~linux System

includes a file system of size 0 blocks -B,--block-size= size block with specified -H,--human-readable file system size in an easy-to-understand format (e.g. 1K 234M 2G) -H,--si similar to-H, but takes 1000 of the time instead of 1024 -I,--inodes displays inode information instead of block usage -K is--block-size=1k -L,--local only displays the native file

(1) Process management1. Determine the server health status2. View the processA. Viewing all processes in the system: PSExample: PS aux (using BSD OS command format)A show all foreground processesX Show all background processesU shows which user generatedPs-le (using the Linux Standard command format)-L display more detailed information-E Show All processesResult descriptionVSZ: Occupies virtual memory size

simply enters the command man and the name of the command shell will list a complete description.Standard usage:Name of the man commandTo query the description page of the LS command, enter the command: Man lsTo flip through the manual page, you can use the page UP and PAGE DOWN keys, or use the spacebar to turn back one page and use B to flip forward. To exit the manual page, enter the command Q. To search for keywords in the manuals page, enter a command/and keyword or phrase to search for, a

80/tcpBased on C/S modelLoading httpd/var/www/html/ETC/HTTPD/CONF/HTTPD.CONF Master configuration fileSELinuxAn access model developed by the U.S. Security ServiceEnableDisabledEnforing: Mandatory mode if our actions violate selinux, force a refusalPermissive: If you violate SELinux, you will only be warned that you can still accessFiles can be set up with permissions called DAC active access controlSELinux mac for files or directories, mandatory access controlTwo important elements related to S

example: useradd-d/home/bird bird2 ---bird2 is the account name,/home/Bird is the main directory of Bird2 -the general user of the system's main directory is generally built in/home/this pathpasswd Set User password -- in Linux, Superuser can use the passwd command to set or modify the user's password for a normal user. Users can also use the command directly to modify their own passwords without having to use the user name after the command. --pa

also useful when creating a RAM disk.Module classLsmodDegree of importance: MediumLists all installed kernel modules.InsmodDegree of importance: MediumForce the installation of a kernel module (instead of using modprobe if possible) must be called as root.RmmodDegree of importance: MediumForces the uninstallation of a kernel module. Must be called as root.ModprobeDegree of importance: MediumThe module loader, in general, is automatically called in the startup script. Must be called as root.Depm

Installing Pdftotext to Redhat/rhel/fedora/centos/ubuntuInstall Pdftotext (CentOS) in a different Linux distribution version using the Poppler-utils package:# yum Install Poppler-utilsor use the following command in Debian/ubuntu:$ sudo apt-get install Poppler-utilsPdftotext using syntaxPdftotext {pdf-file} {Text-file}How do I convert a PDF to text?Convert Php-ma

Find a very detailed Linux shell script tutorial, in fact, not only the shell script programming, but also introduced the system of various commandsHttp://vdisk.weibo.com/s/yVBlEojGMQMpvThis book is divided into five parts, in detail the shell programming skills, a variety of UNIX commands and syntax, but also related to UNIX