Linux

1.1 Viewing the number of CPUs# Cat/proc/cpuinfo | grep "Physical ID" | Uniq | Wc-l2 **uniq command: delete duplicate rows; wc–l command: Count rows * *1.2 Viewing CPU Cores# Cat/proc/cpuinfo | grep "CPU Cores" | UniqCPU Cores:41.3 View CPU Models#

LVM Logical Volume Manager can be said to be one of the key knowledge of Linux operation and maintenance work, let Xxxlinux engineer training organization teacher to take you to learn it!The following is a look at the LVM side of the noun (all

One, view the Linux kernel version command (two methods):1, Cat/proc/version [Email Protected]centos home]# cat/proc/versionLinux version 2.6.32-431.el6.x86_64 ([email protected]) (GCC version 4.4.7 20120313 (Red Hat 4.4.7-4) (gcc)) #1 SMP

directory structure of Windows and the directory structure of LinuxTAB keyComplement keyMkdirCreate a Directorymkdir-Make directorymkdir -p/zgc/-p Create multiple directories at onceTouch commandTouch # Create a file, modify the file's

The most basic TAB completion * Wildcard Characters CTRL + C interrupts the current process Ctrl+d EOF or exit Shift+page down/up Window page Instruction/Archive Help: Man page (manual description document)

1. When performing certain operations that require higher permissions, you can use (sudo + raw commands) for higher permission operations, but you will need to enter a password each time you use it for the first time, which is 2 more hassle. Change

Command suThe format is:su [-] username, the back can follow-, also can not follow.When a normal user's SU command is not username, it is equivalent to switching to the root user and vice versa. When the SU command is added-the various environment

1.Linux Desktop Environment IntroductionCompared to the current Windows system, Unix/linux itself is not a graphical interface, we usually see on the unix/linux distribution of the graphical interface is actually only run on the Linux system on a

You can view various kinds of specific information of the file: The digital form of the file permission 0664;uid, the number form of the GID's permission, etc.More Usage Reference Stat--helpLsattr test.sh to view other properties of a file:

First, the SEDThe Grep tool feature can only be found and cannot replace the found content.SED itself is a pipeline command, mainly in the Behavior unit processing, can be the data row to find, delete, replace characters or strings, swap string

12-Week Lesson (April 23)12.1 Lnmp Architecture Introduction12.2 MySQL Installation12.3/12.4 PHP Installation12.5 Nginx IntroductionExtendedWhy Nginx is more efficient than Apache httpd: Principle Article

FindF (normal file) d (directory)Finding: Find directory-type-fDelete: Find directory-type-f-exec rm-f {} \;Finding: Find directory-type-dDelete: Find directory-type-d-exec rm-f {} \;Cat Viewing filesCat-n Add line number (read only, do not

Set scheduled Tasks The effect of crontab–e and VI is the same, are edited->crontab–e join: 0 * */1 4 su-oracle-c/home/oracle/oracle.sh time-sharing sun and moon Week Oracle to run the task description: In the month of Thursday run dcms.sh file time

Preparatory workThe main function of Yum (Yellow dog updater,modified) is to facilitate the addition, deletion and updating of RPM packages. It solves the problem of package dependencies and makes it easier to manage a large number of system update

Lamp refers to the first letter of the Linux (operating system), Apachehttp Server, MySQL (sometimes also referred to as MARIADB, database software) and PHP (sometimes also referred to as Perl or Python), generally used to establish a Web

1.Linux has developed another virtualization technology: Linux container (Linux Containers, abbreviated as LXC)The 2.Linux container is not simulating a complete operating system, but rather isolating the process3.Docker is a package of Linux

12.1 Lnmp Architecture Introduction12.2 MySQL InstallationGo to download catalogue CD/USR/LOCAL/SRCView the files that have been downloaded LSTo see if a process is running PS aux | grep MySQLRemove the installation directory

BTRFS (B-tree,butter fs,better FS), announced by Oracle in 2007 and in progress in the Cow (copy-on-write) file system. Btrfs appears because its developers initially wanted to extend the functionality of the filesystem so that it included snapshots,

Linux installation Gradle Gradle is based on the Groovy language and is oriented toward Java applications. Automated building tools based on DSL (domain-specific language) syntax. On GitHub, there's a lot of gradle projects, some Gradel with Maven,

Https://www.cnblogs.com/kerrycode/p/4391859.htmlFind. -type f-size +800mAs shown in the command above, we can only see the file name of files over 800M, but the information about the file (for example, file size, file attributes) is unknown, can you