linux practice exam

Linux DHCP service practice-Linux Enterprise Application-Linux server application information. The following is a detailed description. We know dhcp is a dynamic IP Address Allocation service pull! In a network, if there are not many computers, we usually manually assign IP addresses and other network settings to each

boot:Chkconfig--list MySQLView MySQL listens on the listening port (default is 3306 ):Netstat -lt | grep MySQL" MySQL user name, remote login Settings "How to install and start the above MySQL , MySQL after the initial installation, you also need to set up user name, password, and remote login and so on. MySQL by default, only Root user, and the password is blank, this machine is not allowed to log on to other machines. If you want to set a password to root and allow it to telnet, you need to d

"); Elseprintf ("read from msg queue%d bytes\n", Reval); Msg_stat (MsgId, msg_ginfo); Msg_sinfo.msg_perm.uid=8; Msg_sinfo.msg_perm.gid=8; Msg_sinfo.msg_qbytes=16388; Reval= Msgctl (MsgId, Ipc_set, msg_sinfo); if(Reval = =-1) {printf ("msg Set Info error\n"); return; } msg_stat (MsgId, msg_ginfo); Reval=Msgctl (MsgId, Ipc_rmid, NULL); if(Reval = =-1) {printf ("unlink msg Queue error\n"); return; }}voidMsg_stat (intMsgIdstructMsqid_ds Msg_info) { intReval; Sleep (1); Reval= Msgctl (MsgId,

packages at the same time in the on-site process (it's amazing) because you'll need SSH to provide a remote connection service later, if you do something inside the SSH setup it's a big back door, and MySQL doesn't reinstall. Later, these two problems have to wait for customers to connect the server to the network, the OpenSSH in the Redhat version of the release package of the OpenSSH and Telnet-related packets first to the server, and then install the Telnet-server server, Remove OpenSSH Rein

right knife and fork if (Semop (Semid, sops, 1) = =-1) err_exit ("Wait_2fork error");} *///release two cutlery void signal_2fork (unsigned short) {unsigned short left = no; unsigned short right = (no+1)%5; struct SEMBUF sops[2] = {{left, 1, 0}, {right, 1, 0}}; if (Semop (Semid, SOPs, 2) = =-1) err_exit ("Signal_2fork error");} philosopher void philosopher (Unsigned Short No) {Srand (Time (NULL)); while (true) {cout int main () { //Creates a semaphore set: Contains 5 semaphore

the things are compressed separately. If you compress the folder, do not add this is not compressed. will display xx is a directory--ignored)-V displays materials such as the name and compression ratio of the file being compressed.-T verifies the integrity of the compressed file.-1 The fastest compression, compression ratio is very low,-9 The best compression, compression ratio is very high, but the rate is very slow. (You can specify a number 1~9, which is 6 levels by default)The gunzip has no

Program hack for Linux PracticeThis time the practice is file hack, let's start with the login executable file! First we execute this executable program① we want to be able to log in without knowing the password. And no matter what the password is, it is prompt "on your command,my master!" ".The program is first disassembled.We'll first find the entrance to the main function. We can see the CMP statement, t

The shell practice of Linux Learning 1. Describe the operation principle of shell program (can be attached with necessary graphic instructions);2, summarize all the knowledge points involved in shell programming (such as: variables, grammar, command status, etc., to take the picture of Yo);Summary article: http://pizimsn.blog.51cto.com/7002551/16976713, summarize the course of all the circular stateme

First, the actual case (practice) contentIf you study Linux, want to find a portion of Linux related operations, one day you received a company to give the invitation, you came to the company interview, before the interview, OPS supervisor gave you some simple pen questions, the title is as follows:1, the creation of a 10G file system, the type of EXT4, requires

Linux Process understanding and practice (5) discuss the daemon process1. daemon process and Its FeaturesThe most important feature of a daemon is that it runs in the background. At this point, the TSR of the resident memory program under DOS is similar. Second, the daemon must be isolated from the environment before running. These environments include unclosed file descriptors, control terminals, sessions

Practice of C Programming in Linux (1) -Development Platform Construction . GCC compiler GCC is the most important development tool in Linux. It is the gnu c and C ++ compilers. Its basic usage is as follows: Gcc [options] [filenames] Options is the compilation option. GCC provides more than 100 compilation options, but only a few are frequently used. We will on

Article Title: Linux Practice strategy: NFS server troubleshooting. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. In Red Hat Enterprise Linux