Linux

Top See the memory has res shr virt severalThese kinds of things have different meanings:Res:1. Memory currently in use by the process, including heap memory allocated by various methods such as malloc new, and stack memory for program method calls.

0. System ();The system () function calls the shell program to execute the command (low efficiency), which is equivalent to fork (), then Execve (); Features: The original process and the sub-process each run, and the original process needs to wait

According to foreign media arstechnica, a Chinese chip-level system maker (Allwinner) has left a root backdoor in the kernel that it is carrying in its product development. The full-log processor chip is used on many low-end Android tablets, set-top

Jack Bauer performance Test and Python Automated Test training course synchronization admissions, consulting qq:2083503238The error is as follows Error: "Net.bridge.bridge-nf-call-ip6tables" is an unknown keyError:

If a dynamic library has a global variable, the dynamic library used by program A, and program B also uses this dynamic library, is the global variable in program A and b a? That is, when using dynamic libraries between processes, do you share

Five big search commands to learnExplain Locate,find,which,whereis,grep five major Linux search commands separatelyLocateExplanation: As can be seen from the man manual, locate lookup is based on the file name, but relies on the updatedb command.

IntroductionCat commands are often used to view the contents of a file, and some of its own parameters can often be used for special content processing.ParametersUsage:cat [OPTION] ... [FILE] ...concatenate FILE (s), or standard input, to standard

To set read and write permissions for a folder:sudo chmod-r 777/dataPermission Code Descriptionsudo chmod 600xxx (only the owner has read and write permissions)sudo chmod 644xxx (owner has read and write permissions, group user only Read permissions)

Linux rpm under System Commands and Yum the UseRpm:redhat Packages Manager (Management of Red Hat series packages), primarily for installing, uninstalling, upgrading, and managing software.A package consists of the following components:For example:

Original address: http://my.oschina.net/epstar/blog/513186Curl Plain Text Format output:ifconfig . Mecurl curlmyip.comcurl ip.appspot.comcurl ipinfo.io/ipcurl ipecho.net/Plaincurl Www.trackip.net/ICurl JSON format output:Curl ipinfo.io/ifconfig.

I. Build Linux driver framework (load, unload Linux drivers)The Linux kernel uses the driver to load the driver, perform some initialization actions during the loading process (build the device file, allocate memory, etc.), in the driver must

Scene:The computer network segment of the classroom is 172.16.30.0/24 some learning materials and the IP of the Yum source is 172.16.8.100By default the classroom computer is interoperable and connected to the teaching ftp172.16.8.100Now need to

The last two years, finally know the precious time, feel the time too fast, often said a word is not time, how many points, how many points. Summary reasons, mainly before nothing, is the time, feel the time too slow, how so boring, when a person

I. Adding a virtual machine system using clones(1) Cloning virtual machine specific steps: Turn off the virtual machine system you are using, or you will not be able to use the clone function1. Select the virtual machine navigation bar-virtual

Since the beginning of Learning Linux network programming to write a chat room, initially intended to use a multi-process way to write, but found that the communication between the process is a bit cumbersome, and the cost is also large, and then

Install chrome in CentOS7 and centos7chrome This article mainly records how to install chrome on CentOS7.0. 1. Configure the yum download Source: Create a file google-chrome.repo under the/etc/yum. repos. d/directory and add the following content

Eth0: error fetching interface information: Device not found, eth0fetching Reproduced, source: http://zh888.blog.51cto.com/1684752/775447 This test is effective. Thank you for your attention !!! ---------------------------- Split line ---------------

Linux commands (1) and linux commands ( Linux commands In the linux environment for work and study, we spend more time beating our fingers on the keyboard. Here, let's talk about how to use linux commands.In a linux environment, you obviously cannot

Linux cat command and linuxcat commandIntroduction Cat commands are often used to view the content of a file, and some of its own parameters can often be used for some special content processing.     Parameters Usage: cat [OPTION]... [FILE]...

LNMP parameter optimization (without comments) and lnmp Optimization Introduction: PHP FastCGI advantages 1. PHP scripts run faster. The PHP interpreter program is loaded into the memory instead of reading from the memory every time it is needed,