Linux

Orphan processThe parent process dies first, and the child process Tuogu to a process#include #include#includeintMainvoid) {pid_t pid; PID=Fork (); if(-1==pid) { return 0; } if(0==pid) {Sleep ( -); } if(PID >0) { ; } return

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/4A/19/wKiom1QihfLCu6bTAAQZ8C169MI485.jpg "title=" 63547096596513039783563.jpg "alt=" Wkiom1qihflcu6btaaqz8c169mi485.jpg "/> "Build a highly available Linux Server version 3 " will be

For example, to expand/partition[email protected] mapper]# df-hFilesystem Size used Avail use% mounted on/dev/mapper/vg_mysql-lv_root 24G 8.4G 14G 39%/Tmpfs 499M 224K 498M 1%/DEV/SHM/DEV/SDA1 485M 35M 426M 8%/boot[[Email protected] mapper] #fdik-l

A soft interrupt signal (signal, also referred to as a signal) is used to notify the process that an asynchronous event has occurred. Processes can send soft interrupt signals to each other through system call kill. The kernel can also send a signal

The role of the top commandUsed to view the resource usage of the process, such as you write a program, want to see how much it occupies the CPU, how much memory, whether the machine is overloaded, top can help youUsageEnter top directly, this is

Installing JDK under LinuxSystem environment[Email protected] ~]# File/sbin/init/sbin/init:elf 64-bit LSB Shared Object, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for Gnu/linux 2 .6.18, stripped[Email protected] ~]#

Sometimes blog does not upload attachments, but can be transmitted pictures, so we can compress the attachment in the picture (of course, the picture can not be too large).Linux Store the pictures 1.jpg and file.zip files separately

/Etc/fstab file error, unable to enter Linux system, fstablinuxProblem description Today, I will review Linux File System Management, mount a new hard disk on the Linux system, partition, format, and step by step. In order to enable the hard disk to

Configure the FTP server with vsftpd in UbuntuConfigure the FTP server with vsftpd in Ubuntu After working for a while, I found that although there are a lot of related tutorials on the Internet, it is either too simple to understand the content of

How to Reduce memory fragments and allocate memory fragments when allocating memory I felt that I was often asked this question during the interview. I also learned the slab mechanism of Memcached and found that many servers use this mechanism to

[RK_2014_0924] Ethernet II v. S. 802.3, rk_2014_0924802.3 I. Ethernet Frame Types: Provan's Definitive Answer Novell Frame Type Designation: Ethernet_IICommon name: EthernetLayout: 6 bytes 6 bytes 2 bytes Up to 1500 bytes+----

[RK_2014_0923] the minimum length of the Ethernet II data packet captured by wireshark is 60, and wireshark 1. For the minimum length of Ethernet data packets in wireshark, see the following text:Packet format A physical Ethernet packet will look

CentOS IP configuration After the system is started, ping the Internet or other machines in the LAN. If you select the NAT Internet access mode When configuring the virtual machine, you need to configure a fixed IP address later. For more

Centos6.5 source code compilation and installation Hadoop2.5.1I. compiling environment [plain] view plaincopy Centos6.5 (64bit) Jdk7 Ant1.9.4 Maven3.1.1 Findbugs3.0.0 Protobuf2.5.0 Hadoop2.5.1 source code file Ii. Install all the software

RHEL6.4 changed to CentOS Source After installing RHEL of Version 64 of version 6.4, we found that the Redhat yum online update is charged. If you do not register it, you cannot use it, that is, you cannot install software online, therefore, we need

CentOS scheduled Task ProcessingAdd task: crontab-e 0 */1 *** command 0 */2 *** command to check whether the task has been added: crontab-l 0 */1 *** command 0 */2 *** commandBasic Format: minute hour day month dayofweek

Detailed description of at commands for linux/centos scheduled tasksCommand:Scheduled task. You can only execute one task at a time.Syntax: # at [parameter] [time]At> executed commandExit at command ctrl + dCommand prerequisites:You need to enable

CentOS6.5 configure cron tasks Cron is a daemon that can be used to schedule the execution of repeated tasks based on the combination of time, date, month, and week. Cron assumes that the system continues to run. If the system does not run when a

Detailed description of the find command in linuxFindSearchIt is a real-time Feature and does not require a database. It is relatively slow.1. Recursively search for files in a specified path2. Search by various criteria3. Support for further

Install PostgreSQL using yum in CentOSDirectory 1 Configure YUM repository 2 Install pgdg rpm file 3 Install PostgreSQL 4 Configuration 5 Initialize 6 Startup 7 Yi search reference Configure YUM repository vim