The emergence of free software has changed the traditional company-based closed soft

Linux is a Unix-like operating system on personal computers and workstations. Howeve

 Since September 17, 1991, Linus Torvals officially announced the first official vers

1 Development of the operating system Because the operating system is the basis for a

 The Linux kernel is not isolated. It must be studied in the entire system. Figure 1.

From a programmers perspective, the kernel of the OS provides an extended or virtual

 The Linux kernel source code is located in the /usr/src/linux directory. The structu

Linux Hypertext Cross Code Retrieval Tool LXR (Linux Cross Reference), written by Arn

 In order to easily learn Linux source programs, we may wish to return to the familia

80386, as a member of the 80X86 family, must be backward compatible, that is, it must

  The eight general-purpose registers are supersets of the 8086 registers. Their name

8086 has four 16-bit segment registers: CS, DS, SS, ES, which are used to store the c

 The status and control registers are composed of the flag register EFLAGS, the instr

for Linux Regardless of hardware design or software design, caching is a common means

 Each process in Linux is described by a task_struct data structure. In Linux, the ta

1. Exception Handling Linux uses exceptions to achieve two distinct purposes: ·

Switching From Windows to Nix or a Newbie to Linux – 20 Useful Commands for Lin

This period win8.1 Mac OS X 10.9 Mavericks Two operating systems almost simultaneou

 I dont know how much swap space is allocated, so I will assign one randomly. When I

sudo authorization, and later blog friends reminded me, directly editing the sudoers

 Under the virtual machine, the CentOS6.3 system uses the minimum installation by def

bit 15 or bit 31 The scan word or double word operand oprd2 contains the first bit of

First, the installation of VirtualBox and expansion package installation steps is too

 Set the IP address: /etc/sysconfig/network-scripts/ifcfg-eth0DEVICE="eth0"

Nagios is an open source free network monitoring tool that effectively monitors Windo

 [ -a FILE ] True if FILE exists. [ -b FILE ] True if FILE exists and is a block spec

binary comparison operators, compare variables or compare numbers. Note the differenc

 ACL is an abbreviation of Access Control List. The main purpose is to provide detail

The common network operation commands for Linux systems include netstat, nslookup, ho

 Share some shell usage and scripts that you may not know, simple & powerful! Before

First, switch snmp configuration, the following is the configuration command of H3C 5

 The main commands used: netstat, nmapThe difference between the two is as follows: l

 1, check the occupancy of a partition, use the command df[root@linux~]# df -h file s

There was a problem these days, the USB mouse and keyboard are not available. The fin

 Sometimes we need to set up a script in the server to let it start itself when it bo

Linux centos restart command: ■ 1, reboot ■ 2, shutdown -r now restart immediately (r

 Deploying java development web application under linux, generally adopts Tomact+jre

VI/VIM is one of the most commonly used tools for programmers, especially on unix/lin

 Today, the author computer installed the LinuxOS, and then wanted to change to the W

to view the memory usage under the Linux server, you can use the command free -m. Not