Linux

You want to modify the permissions of all the files in a directory at once, including the file permissions in subdirectories, and to use the parameter-R to initiate recursive processing.For example:[[email protected] ~]# chmod 777/home/user Note:

1. Crontab task scheduling: Refers to the system at a certain time to execute a specific command or program2. Tasks on Linux are divided into: system work (e.g., anti-virus), individual user's work 3. Set task: A. CRONTAB-E will go to edit interface

Expr is a multiplication method, but is limited to integer type.Expr 3 + 2Expr 5-2Expr 3 * 2Expr 10/2To make a floating point count, you can use awk.[[email protected] ~]# awk-v x=2.5-v y=2.5 ' BEGIN {printf "%.4f\n", X*y} '6.2500[[email protected] ~

1. The command for user Switching in the Linux system is SU, and the syntax is:su [-FMP] [-C command] [-s Shell] [--help] [--version] [-] [USER [ARG]]Parameter description-F, –fast: Do not need to read the boot file (such as CSH.CSHRC, etc.), only

1.linux Restart WebLogic (Shutdown and start):SSH remote connection to Linux server!Open weblogic:1, find/oracle/middleware/user_projects/domains/user _domain directory, 2, execute nohup. Startweblogic.sh (Nohup's role is to let WebLogic boot in the

1. Process: Executing program, each process has an ID number 2. Threads: 1. Lightweight process 2. The process has a separate address space and the thread does not have 3. Thread cannot exist independently, he is a process created (FORCK) thread

Download the installation package# wget Http://www.python.org/ftp/python/3.3.4/Python-3.3.4.tgzExtract# TAR-XZVF Python-3.3.4.tgzCreate a path for a new version of Python# Mkdir/usr/local/python3Installation# CD Python-3.3.4#./configure--prefix=/usr/

Centos's dhcpd modification log is not recorded in the system log Edit the dhcp service configuration fileVim/etc/dhcp/dhcpd. conf is added to the endLog-facility local4; Edit the rsyslog service configuration file and add/var/log/messages to local4

CentOS basics: Process Management Process is a very important concept in the operating system. All data running on the system will exist as a process. In Linux: when an event is triggered, the system will define it as a process and give the process

Replace Centos6.4 with the yum source provided by 163.1. Description YUM is the abbreviation of "Yellow dog Updater, Modified", is a software package manager, YUM from the specified place (the rpm package address of the relevant website or the

CentOS basics: Startup Process Computer startup is a very complex process. From power-on to desktop display, a series of indispensable processes are required. Understanding these processes helps us better understand the operating system, it also

CentOS basics: File System We know that different operating systems use different file systems. For example, before Windows 98, the file system was FAT, and later versions of Windows 2000 were called NTFS file systems. For Linux, the regular file

CentOS basics: File Management In Linux, all files and directories start with the root directory. And then branch one by one to form a complicated tree. Therefore, we also call this directory configuration method "directory tree ". What is the

CentOS7 VNC Installation Steps First, let's look at what VNC is (Virtual Network Computing) VNC allows Linux systems to access Linux desktops like remote desktop access in Windows. This configuration machine runs in a Centos 7 HP Server in xingning

Linux File Archive CompressionFile Archive compression:Compression and decompression command compression formats: gz, bz2, xz, zip, zCompression Algorithm: different algorithms and different compression ratiosCompress: FILENAME. ZUncompressGz: gzip.

Linuxlvm Common commandsPv: pvcreate, pvremove, pvscan, pvdisplay, and pvmovePvcreate/dev/sda {10, 11}Pvs view the pv of the current systemPvdisplay View DetailsPvscan scans the pv on the machine on the current node.Vg: vgcreate, vgremove, vgextend,

Install MySQL online on CentOS There are many ways to install MySQL in CentOS. This article introduces a very easy installation method, provided that the network connection is normal. Step 1: Enter the commandWget

Linux system management commands System and management commands Users and Groups commandsUsersImportance: MediumDisplays all logged-on users. This command is basically the same as who-q. GroupsImportance: MediumLists the current user and the group

Linux network configuration -- ifconfig & amp; ipHost access network:IPNETMASKGATEWAYHOSTNAMEDNS1DNS2DNS3Manually specify:DHCP: Dynamic Host Configuration Protocol RoutingLinux Network Configuration:Network is a kernel function /Etc/udev/rules. d/***

Configure JBoss in CentOS Step 1: Download The JBoss compressed package on the windows platform. For each version of JBoss: http://teddysun.com/260.html; Step 2: Use the LeadFtp client on windows to upload the unzipped JBoss file jboss-eap-6.2 to