Linux

int status;pid_t t = fork (), if (t) {waitpid (T, &status, 0);}    else{System ("VI temp.txt"); Exit (0);} After both the parent and child processes have finished executing the parsing process: if and else or select branch.The main reason is that

The following is a log-like code, the message content of the communication and the content of the environment parameters, is to create a file, using standard IO fopen, fprintf for output records. But in the debugging, at first I was dumbfounded, the

Manually execute SH script in CentOS, call Java program, everything is OK;The SH join crontab in the timing of scheduling, hang up, completely did not perform to the feeling AH!!!To view the crontab execution log:Cat/var/log/cronHave execution

CatNAMEcat-concatenate files and print on the standard outputSynopsisCat [OPTION] [FILE] ...DESCRIPTION-N,--numberNumber all output lines -E,--show-endsDisplay $ at end of each line[Email protected] ~]# cat-e/etc/inittab#$# Inittab This file

Linux display details of files and directories[Email protected]:~$ ls-l total dosage 56-rw-r--r--1 youhaidong youhaidong 8980 December 00:10 examples.desktopdrwxr-xr-x 2 root root 4096 January 1 21:18 javadrwxr-xr-x 2 root root

disk-level conceptsThis is mainly about the online so-called old-fashioned disk, it is composed of a platter, we start from a disc structure. 1, the graph of a circle of gray concentric circle for a track, from the center to draw a straight line,

Linux system single NIC binds multiple IP addressesDescriptionSingle NIC binding two IP addresses, telecommunications and Unicom, the purpose: is to be used when the telecommunications fault unicom normal use.SystemIP AddressSubnet maskGatewayCentOS

First searched the Internet some information, said is temporarily unable to solve.However, in the installation of the choice is the Chinese installation, so on the command page is displayed in the box garbled.Since it is the Linux service version, I

Here's how to install Yii2 under Linux , see my other blog post forwindows to install YII2 http://blog.csdn.net/zqtsx/article/details/39344913The first step installs the composer:Syntax: "Curl-ss Https://getcomposer.org/installer | PHP executable

First, Runtime pm introduction1. Background(1) Display requirements(2) The demand of dynamic power optimization for the whole system(3) Upstream2. Solution(1) Introduction of Debounce(2) Use a unified workqueue to manage tasks(3) Close the device

MBR , all called Master Boot Record , that is, the hard Master Boot Record . bootloader , partition table and delimited identity), That is, the master boot Record bootstrapper because the MBR partition table has a maximum

Today suddenly interested in RABBITMQ, on the virtual machine has a play (Ubuntu 14.04 installed on the virtual machine, you can enter lsb_release-a view version information). As long as the Linux kernel, the basic installation method should be

Analysis of the causes of UDP packet loss in Linux system kernel1. UDP Checksum ErrorPhenomenon: You can use NETSTAT-SU to see that there is a UDP error packet.Tcpdump catch packet, open the captured UDP message in Wireshark, turn on checksum option,

If you're going to switch to the ETC directory in the current directory then use this CD etc This is the relative path, and this is the way to go back to the root directory under the CD/ETC directory Absolute Path, the absolute path file in front of

linux grep command1. RoleThe grep command in a Linux system is a powerful text search tool that uses regular expressions to search for text and print matching lines. The grep full name is global Regular expression Print, which represents the

Linux SSH operation parsing and LinuxSSH operation Parsing1. view the SSH status: Service sshd status Check whether ssh has been started and some status information 2. Start the SSH service:Systemctl restart sshd. service Ps: some basic services

View linux system information commands (kernel, OS, cpu, etc.), linuxkernel 1. view the kernel information of the current operating system [Spark @ S1PA222 tomcat6] $ uname-Linux S1PA222 2.6.32-358. el6.x86 _ 64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x8

Install weblogic12C on Linux (Remote GUI installation) (2) and linuxweblogic12c The previous Linux installation of weblogic12C (Silent Installation)This article describes how to install weblogic in silent mode through a remote graphical interface on

Use of the sort command in Linux By default, the sort command in Linux sorts each row in the file and then outputs the result. Specifically, it starts from the first character of each line and compares the results by ASCII code value in sequence.

Celebrate the launch of the CentOS open source image source of Chongqing University!The new CentOS image source is available! Chongqing University mirror station Co., http://mirrors.cqu.edu.cn. is currently included in CentOS, Archlinux, CentOS,