Linux

Basic knowledge of Linux and related conceptsOne, the distribution version of LinuxThe so-called release version is the Linux kernel + open source program Debain,ubuntu Ubantu is a derivative version of Debain, desktop system is better,

The following are the commands that I contact when I study, and the follow-up will slowly add1.tty: View terminal typeVirtual Terminal:/dev/tty#Pseudo Terminal:/dev/pts/#Console:/dev/consoleSerial Terminal:/dev/ttys#2.STARTX: Start the graphical

The most original intention: when their own talent can not dominate the inner dream, you need to calm down to read reading. Know that Linux is a coincidence, but since the choice, then work hard. This is my first blog post, and also my formal

SEQ command: Used to produce an integer that counts to another numberExample 1:[[email protected] 0702]# SEQ 1 512345[[email protected] 0702]# SEQ 512345The result of SEQ 1 5 and SEQ 5 is the same, and the default starting value is set from

1. View operating system kernel information uname -2.6. -194. El5 #1: £ º x86_64x86_ x86_64 Gnu/linux2. Query CPU InformationOverall information Cat /proc/cpuinfoCPU Name [[email protected] ~]# cat /proc/cpuinfo | grep Namemodel Name:intel (R)

Download genymotion http://www.genymotion.cn/on official website Then do the following:1. If the machine does not have VirtualBox download one can be downloaded by instruction sudo apt-get install VIRTUALBOX-QT2. Download the genymotion to do the

Instant file transfer between Linux hosts, SCP commands are familiar to everyoneBut when the file to be transmitted is large, the process is more tragic if the network is interrupted. At this point you can consider using the rsync command instead of

/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

1. Delete file command: Find corresponding directory-mtime + days-name "file name"-exec rm-rf {} \;Instance command:find/opt/Soft/log/-mtime +30-name "*.log"-exec rm-rf {} \; DescriptionRemove all files with ". Log" 30 days ago in

Valgrind Introduction:Valgrind is the framework for dynamic analysis tools. There are many Valgrind tools that can automatically detect many memory management and multi-process/thread bugs to dissect your program in detail. You can also use the

Yesterday the company a server suddenly can not ping,ssh, from the IDC feedback said the server outsourcing, the number of large, CPU status display 200%. Viewing the following process files via PS aux is an exception

I. DHCP-REQUIRED PackagesDhcp-common-4.1.1-34.pl.el6.centos.x86_64Dhcp-4.1.1-34.pl.el6.centon.x86_64Two. Edit the master configuration filevi/etc/dhcp/dhcpd.confddns-update-style interim;ignore client-updates;shared-network ifs {

1, initialization: One, git clone, the remote Git repository, cloned to a local copy. Mode two, git init and git remote2, git pull: Update other repository code to local. For example: Git pull Origin master, which updates the code from the Origin

Reference:openstack Grizzly Install Guide1 ubuntu How to add a virtual network card sometimes, a server needs to set up multiple IPs, but does not want to add multiple network cards, Then you need to set up the virtual network card. Here are two

Proc file system Introduction The/proc file system is a pseudo file system, which only exists in the memory and does not occupy the external storage space. It provides a communication interface between the kernel and processes in the form of a file

Ps-ef | grep./amplxe-gui | grep-v grep | cut-c 9-15 | xargs kill-9 Kill processes that contain the keyword "./amplxe" in batches. "Ps-ef" -- view all processes"Grep./amplxe-gui" -- list all processes that contain the keyword

To write a script, you need to obtain the first second of the previous month and the last second of the previous month. After reading the relevant information and using your own practices, you can find the following method to meet the requirements,

In linux, UTF-8 is generally used, while in windows, gb2312 is used for file editing. Therefore, Chinese encoding is garbled. To correct this problem, it is actually very easy to convert the file into UTF-8 encoding format and then import it

  ARP datagram format Note that the source MAC address and target MAC address appear each time in the Ethernet header and ARP request. It is unnecessary for the link layer to be Ethernet, however, if the link layer is another type of network, it

It mainly transplanted the list and rbtree in the kernel. These two data structures can also be used in user-state programs. At the same time, cpputest is used to test the transplanted code. (The test code is actually using the two data structures)