Linux

How to obtain detailed information about the CPU:Linux command: Cat/proc/cpuinfoUse the command to determine several physical CPUs, several cores, etc.:Number of logical CPUs:# Cat/proc/cpuinfo | grep "Processor" | Wc-lNumber of physical CPUs:#

http://blog.csdn.net/xu3737284/article/details/12710217The address space of a process in a Linux operating system on a 32-bit machine is 4G, where 0-3g is the user space and 3g-4g is the kernel space. The address space of the process exists in

Select the IP address of the same network segment as your native IP is OK, my IP is650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M01/8D/59/wKiom1iYlS-yDrSHAAAFza23wYs185.png "style=" float: none; "title=" Clipboard.png "alt="

One first download arm-none-linux-gnueabi-gcc Cross compiler, according to different needs please at the URL:Download the required code in the Https://launchpad.net/gcc-arm-embedded/+downloadTwo create a directory by extracting the commandTAR-JXVF

The use of the general Vmstat tool is done by two numeric parameters, the first parameter is the number of time intervals sampled, the unit is seconds, the second parameter is the number of samples, such as:[Email protected]:~# vmstat 2 1procs-------

Configuration fileUser Information file:/etc/passwdOne line with 7 messages man 5 passwdRoot:x:0:0:root:/root:/bin/bashUser name: Password bit: User uid: Default group GID: Description information: default directory after user login: command

Procedures and processes do not correspond to each other, a program can be shared by multiple processes, the program is a static concept, and the process is the process of program execution, has a certain life cycle, is the dynamic generation and

Linux Root partition expansionToday's web site upload pictures problems, at first thought it was a program problem, and then found that the original server storage space is not enough, obviously there is 200G of disk space, no reason to use up so

For Linux systems booting with GRUB. After post, when the Grub boot interface appears, press the E key to enter edit mode, as shown in: Move the cursor to the line with the word "kernel" and press the E key to edit it. Press a space at the end,

1. Network Environment View command:1.1 ifconfig command: View and configure network commands1.2 Turn off and start the NIC: Ifdown/ifup NIC device name-disables and enables the NIC device1.3 Querying network Status:Netstat option (-TULN: The

Implementation of soft raidMdadm-C: Creates an array.-A: assembly-F: Monitoring-D--detail: Displays details.Major: The main device number that distinguishes the device category.Minor: the secondary device number used to distinguish between different

The TRTR command can replace, compress, and delete characters from standard inputGrammarTR Options (SET1 SET2)Options- C or--complerment: Supersedes all characters that are not part of the first character set;-D or--delete: Deletes all characters

Paste the two lines directly together, and the middle is separated by the "tab" keyGrammarPaste (option) (File1 file2)Options-d or--delimiters=: Replaces the skip character with the specified interval character;-S or--serial strings are processed

Col is often used to dump a description file into plain text for easy readingGrammarCol (option)Options-B: Filter out all control characters, including Rlf and Hrlf;-F: Filter out the RLF character, but allow the Hrlf character to be rendered;-x:

File owners, other groups in the group-changing the user groupGroups and groups in the OA system are similar, the user represents the individual, the group is a bit like the meaning of the role. But the permission is not the individual from the

Time synchronization Setup of hardware Time hwclock Clock Clock and hwclock usage similar, only one on the line, but clock command in addition to support the x86 hardware system, but also support the Alpha hardware system. Viewing

Why do you need a faster CPU?   Because you need to save time. CPU is divided into time slicesCPU in order to avoid waiting for IO time, we want to maximize the performance of extracting CPUThe kernel does not have any productivity, the less time

reference:http://blog.csdn.net/jiaobuchong/article/details/50272761#One day, I want to check the use of computer hard disk, as a command control, nonsense, start it:Use the DF command to view the current disk usage:[Email protected]:~$ df-lh

1. Download the program code in Linux (make sure you get the correct file attributes) 2, in the Windows code, for the existing code, do not change the file permissions, such as the original 755, change the contents of the file is still 755 after the

"Fatal: protocol error: bad line length character: No This", fatallength "Fatal: protocol error: bad line length character: No This" error occurs during git clone remote address Changes found on stackoverflow ~ The/. bashrc file uses echo "error