1 Basic concepts of disk
1 Track (orbital), Cylinder (cylindrical), sector (sector), head (heads)
2 representation of disks in Linux systems
1 Linux all devices are abstracted into files saved in/dev directory
2 The name of the
Linux when starting a process, the system will create a PID-named folder under the/proc under which there will be information about our process, including a file named EXE that records the absolute path, which can be viewed by ll or ls–l commands.
Linux system operation for a long time, will produce a lot of watching video, download files left by the cache, if the occasional cleanup will cause the system to become very slow, the following small series to introduce the Linux release caching
Starting with the 2.6.16 version of kernel, we can use the Smaps in the proc file system to find this problem. Below is a list of all processes that occupy swap partitions. Can be used for statistics in/proc/$PID/smaps detected by simple
I. The installation and configuration of LVS based on NAT
1. Hardware Requirements and network topology
2. Download software:
(1), Kernel source code: Need to download the 2.4.23 version of the kernel source code. The download address
Date of 1st
1 time to view the current system by date date
2 format display time date +%y--%m--%d, the middle of the connection symbol can be arbitrary
3 Set the time of the system sudo date-s "Xx:yy::zz"
4
There are two types of scheduled tasks: one that is not executed after execution, and one that is executed periodically.
Scheduling tasks are divided into: System scheduling tasks, user-defined scheduling tasks.
The meaning of a scheduled task is
The user uses the Telnet command to log on remotely. command allows users to use the Telnet protocol to communicate between remote computers, and users can log on to a remote computer over a network, as if they were logged on to a local machine to
1, download ubuntu system mirror to Mac, the latest version of the system for Kylin, completely free. Download Address: http://www.ubuntu.org.cn/(Parallels Desktop provides a variety of system downloads, can also be downloaded directly in the
simple steps to make a Linux system that starts with a U disk:
First, the U disk for processing
1. Partition: (Insert the U disk)
# FDISK/DEV/SDB
D Enter Delete the existing partition
N Enter a new primary partition
W Enter Save Settings
#
We all know that a lot of Linux system operations require commands to execute, in the process of executing commands, sometimes encountered [root@localhost ~]# Iptraf error prompts, how to solve this problem? The following small series to introduce
When installing the RedHat Linux operating system with Vmware Workstation, because there are 3 RedHat Linux installer image files, RedHat Linux will remind us to insert the 2nd or 3rd CD at the appropriate time during the installation process.
As
Tip: Windows XP technical support will end in 90 days! That is, 2014 4 as Microsoft will end all service support for Windows XP, many users will face a huge security risk, because XP is still the second highest in global usage, after Win7. And
One, insert U disk to computer, if currently only inserted a U disk and your hard drive is not a SCSI hard drive interface, then its hardware name is: SDA1.
Second, in the MNT directory first set up a U directory.
Third, then command prompt #
Here to tell you about Linux under the U disk how to use, mainly from two scenarios to introduce. Hope to be helpful to everybody's study.
Programme I:
Linux is not like Windows, after the new hardware can be automatically recognized, in Linux
In fact, the Linux system input method to switch and Windows system is the same, in English and Chinese switch with CTRL + SPACEBAR, other with Shift+ctrl.
Fcitx Input Method Installation Tutorial:
1. It is recommended to install through
When installing multiple network adapters on a Linux system, changing the name is not so simple, in the face of this multiple network card situation, Linux How to modify the name of the network card? Come along with the small weave to understand.
/bin,/sbin,/usr/bin,/usr/sbin Differences/: This is root directory root user root/bin:commands in this dir is all system installed user commands system Some instructions/sbin:commands in this dir is all system installed Super User Commands Superuser
the philosophical thinking of Linux :1. All documents: Abstract almost all resources into the form of documents, including hardware devices, and even communication interfaces;Open (), read (), write (), close (), delete (), create ()2. Consists of a
A DescriptionTaking linux-2.4.10 as an example, this paper mainly analyzes the schedule function and its related functions in Linux process scheduling module. In addition, the relevant prerequisite knowledge will also be explained. The default
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