practice of system and network administration

Written in front: After using python for reptiles, found that it has not used my old line of PHP crawl, plus a senior dog has just started to meet the so-called pit * training, and can not go out to find an internship, so can only entertain themselves, just see the recent school operation of the public number, there are binding school number, Then query the functions of various things, and then want to imitate this function to do. Functional interface with the use of TP development, but also rel

)Administratorb)Administratorsc)Guestd)SYSTEMthe process of opening the brain hole:What? This question is really a single choice? Really have an answer? Aren't these four built-in? All right? Leng to choose one, that only as the firefly-like Sharp outstanding D-June, Ah! Wait, no, if in fact, as I remember the four are built-in accounts, that as a group of accounts or called Account Group B is extremely suspicious. .................. Well, to say that the account, it is not specifically grouped

management, file management, package management, and other basic automation requirements than tedious manual work. In this scenario, Ruby is very useful. It has a very good library to meet this point. For this article, I assume that the reader has the application knowledge of Ruby. The basic examples provided here use pure Ruby, so can any UNIX-like support in Ruby? System and Windows? Run on. For more advanced Cfruby examples, you need to be able t

system table. Can you imagine the complexity of the relationship? To tell the truth, that time really gave me a headache. Every day I repeat students, teachers, classrooms, colleges, and so on. It's really boring. In fact, the root cause of this idea is that I do not have a deep understanding of software development, and I am blindly infatuated with the study of technology. I think that if I discuss this every day and cannot learn any technology, I

debugs, no problem. Finally I use Firefox browser, Firefox login to see the request information, it is strange that unexpectedly found no cookies,This is very strange, in the group of Httpclent asked, some said debugging tools, I think it is also, then try Httpwatch,firebug, Google Browser, there is a big brother introduced the use of Fiddler2. The result is still no cookies, a wry smile, but found Fiddler2 this tool good, analytical very detailed, interested can be downloaded to use.Usually is

can arrange fixed push, enhance the presence, enhance publicity, let students know there is this platform.The following is the experience of students in Nantong University.College Tau Junyi: I did not use, just pay attention to a bit, listen to the roommate said one to choose the lesson need desperately brush, too long to reactCollege Liu Jiacheng: Generally like, with very little, only when the choice of class, the official network card is not inSch

View network configuration information ifconfig View system Resource information (like win system Explorer) Top (ps:load average load Task process Cpus/mem Swap swap partition similar to win system virtual memory) View Memory usage Free-m #-m represents the default KB in megabytes View

Stat Displays details of the specified file, more detailed than LSWho shows online loginWHOAMI Show current Operation userHostname Display host nameUname Display System InformationTop dynamic display currently consumes the most resources process informationPS Display transient process status Ps-auxDu view directory size Du-h/home with units display directory informationDF View disk size df-h with unit display disk informationIfconfig Viewing

root user and is usually used in the system installation script.Getty, AgettyImportance level: LowThe initialization process for a terminal is usually established using Getty or Agetty, so that the user can log on. These commands are not used in the user's shell script. Their behavior is very similar to the stty.MesgImportance level: LowEnable or disable access to the current user terminal. Disabling access will prevent another user on the

: Modify which NIC to follow which, only one can be omitted) x.x.x.x/y (M.M.M.M)//modify IP information; x:ip address, Y: Mask length, M: mask. such as =225.225.255.0Shutdown-h now or Poweroff or init 0//shutdown operation.Shutdown-r now or reboot or init 6//restart operation.Shutdown-r +15 ' The system would be rebboted!! '//Send a notification to each user who is currently logged on to the Linux host ' the syste