Linux

First of all, many caching services are used during PHP development to improve access quality or temporarily store some data.The advantages are simple structure, fast reading speed and easy maintenance. There are some features memcache Redis MongoDB

/etc/fstab (partition mount configuration file)/etc/sysconfig/network (host name configuration file)/etc/sysconfig/network-scripts/ifcfg-eth0 (Network interface configuration file for IP addressSettings/ETC/RESOLV.CONF (DNS server configuration file,

The disk and file system management in Linux systems is summed up in the fact that they are mutually reinforcing and often used together in peacetime work. First, we introduce the management tools for disk partitioning.Common disk partition

Title: Use of the awk commandrole:awk is a very good data processing tool that handles data in the fields of each row, with the default field separator being the SPACEBAR or the [tab] keyFirst, the basic structure of the awk script:　　awk '

Content of this week's job:1, the Replication/etc/skel directory is/home/tuser1, requires/home/tuser1 and its internal files belong to the group and other users do not have any access rights.# Ls/home/tuser1 | | Mkdir/home/tuser1 &&

1.1 Take out the 908 of the A.txt in these three numbers: Instance:[email protected] tmp]# cat a.txt AaaaaaaaaaaaaBBBB BBBBBBBBBBBBBBI am ZJC 1046 (in) 908 jiayou[Email protected] tmp]#The result is:[email protected] tmp]# cat A.txtAaaaaaaaaaaaaBBBB

Linux Course Notes (class opening1, to create their own 51CTO blog, after each test will be written to their own blog, good memory is not as bad as written. 2, Marco full name: Ma YongliangBasis ( RHCE)3 BooksRH1033 FoundationRH133 Operating

Title: Use of SED commandsfunction:sed is the processing of the text data in the behavior unit, you can select (display), replace, delete and add the data by the line.First, usagesed [-NEFR] [action]Parameters:-N: Use Quiet mode to cancel the

Kernel design style:RedHat, SUSECore: Dynamic load kernel moduleKernel:/lib/modules/"kernel version number command directory"/vmlinuz-2.6.32/lib/modules/2.6.32/Redhat5:ramdisk-->initrdRedhat6:ramfs-->initramfsSingle core: Linux (LWP lightweight

Log systemLinux system startup processPc:os (Linux)Post-->bios (Boot Sequence)-->mbr (bootloader,446)-->kernel-->initrd--> (ROOTFS)/sbin/init (/etc/ InittabThe service started differently:Operating level: 0-60:halt1:single user mode, directly as an

Features in the kernel, in addition to the core functions, at compile time, most of the features have three choices:1, do not use this function;2, compile into kernel module;3, compile into the kernel;How to manually compile the kernel:Make

One:system systems Call int system (constchar *string ); The system function is passed to /bin/sh-C to execute the command specified by string. The string can contain options and parameters if/bin/sh is not found . The function returns 127 if

in centos6.8 System for columns , Creating swap partitions view the swap partition of the current system [Email protected] ~]# swapon-sfilenametypesizeused Priority/dev/sda3 partition20725720 -1 create /dev/sdb1 partition

Windows:Dll:dynamic link library, dynamic link librariesLinux:. so:shared object, shared objectsOperating system:Kernel: Kernel:1. Process Management2. Kernel ManagementLibrary: Libraries, APIsShell: human-computer interfaceLoginUser name: User

The purpose of the cat command is to connect files or standard input and print. This command is commonly used to display the contents of a file, or to connect several files to display, or to read from a standard input and display it, often in

1, the Replication/etc/skel directory is/home/tuser1, requires/home/tuser1 and its internal files belong to the group and other users do not have any access rights.1.touch/etc/skel/test.txt # Create a test file in the original

Scene:linux6.4 virtual machines, configure 1 5G disks, do LVM, now expand the disk to 21G, and add the expanded space to the existing LVM group.Steps:1. Disk expansion on VMware (slightly)2. See if the hardware is expanding successfullyCommand:

Popular Linux commands: sed Title: sed command usage Purpose:Sed processes text data in the unit of action. You can select (Display), replace, delete, and add data by row. I. Usage Sed [-nefr] [action] Parameters: -N: Use quiet mode to cancel the

Linux File Management commands and linux commands     Copy and move files Cp: copy Cp SRC DEST Cp file1 file2 file3 // file1, file2 is the source file, and file3 is the target Copy an object to an object Copy multiple files to a directory. The

Linux root file system details, linux Root details   ELF: storage format of executable files Executable, connectable files   File System: Rootfs: root file system Ls/ /Boot: files related to system startup, such as kernel, initrd, and grub (boot