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: Cal 2016//view the Year 2016 calendarUser's environment variable:/home/user/.bash_profileSystem Environment variables:/etc/profileConfigure the. bashrc file to specify that some programs start automatically when the user logs on:One user on the system:/home/user/.BASHRCEntire system (all users):/ETC/BASHRCLinux Start-Up process Analysis BIOS self-test; Start Grub/lilo; Run the Linux kernel and detect the hardware; Run the system's first process init; Init reads the inf

: JavaScript isprototypeof vs instanceof usage Using only the prototype chain to implement inheritance Disadvantages: 1. The prototype property of the reference type value is shared by the instance; 2. You cannot pass arguments to a superclass constructor when you create an instance of a subtype Functionfather () { this.name = "Father"; This.friends = [' aaa ', ' BBB ']; } Functionson () { } Son.prototype = Newfather (); Son.prototype.constr

-shared-o $ @ $ (TGT) 18 Run the following command: $ Make-f makefile-lib $ Generate the libmy. so library. Note: In the maintenance file, row 17th uses the-shared option to generate a dynamic link library, and uses the-s option to remove the symbol table in the target file, thus reducing the file length. 3. Share the dynamic link library 3.1 dynamic link library configuration file To make the dynamic link library used by the system, you need to maintain the configur

set-uid root program to run under the ordinary userIn this case, ignore the LD_PRELOAD environment variable, do not overload the sleep function, and use the system's own sleep function:2.6.3 The program that compiles myprog into a set-uid root runs under rootIn this case, using the LD_PRELOAD environment variable, use the overloaded sleep function:2.6.4 under a normal user to compile Myprog into a set-uid ordinary user program run under another ordinary userIn this case, the sleep function is n

set-uid root program to run under the ordinary userIn this case, ignore the LD_PRELOAD environment variable, do not overload the sleep function, and use the system's own sleep function:2.6.3 The program that compiles myprog into a set-uid root runs under rootIn this case, using the LD_PRELOAD environment variable, use the overloaded sleep function:2.6.4 under a normal user to compile Myprog into a set-uid ordinary user program run under another ordinary userIn this case, the sleep function is n

Render 1. Do not specify render Result: (current models is within Controller)/(current Controller)/(current action). phtml 2. $this->render (' xxx '); Result: (current models is within Controller)/(current controller)/xxx.phtml 3. Summary Render directly into the view file Forward 1. $this->forward (' xxx '); Result: (current models is within Controller)/(current controller)/xxxaction 2. $this->forward (' xxx ', ' Yyy '); Result: (current models is controller)/yyycontroller/xxxaction 3. $this->

The Linux under tar command is extracted to the specified directory:#tar zxvf/bbs.tar.zip-c/zzz/bbs//The root directory under the Bbs.tar.zip decompression to/zzz/bbs, the premise to ensure that the existence of/zzz/bbs this directoryThis is a bit different from the CP command, and the CP command will automatically create this directory if it doesn't exist! attac

Code that is located after the return statement is not executed. In the 1th program given below, you will find that there is a WriteLine function call in C #, but we do not see it in our IL code. This is because the compiler realizes that any statement after the return will not be executed, and thus does not have to convert it into IL. A.cs class zzz { public static void Main() { return; System.Console.WriteLine("hi"); } } A.il .assembly mukhi {}

String explanation Package Com.yuanzijian02;public class Objecttest {public static void main (string[] args) {//TODO auto-generated method Stub Object object = New Object (), Object object2 = new Object ();System.out.println (Object = = Object2); System.out.println ("---------------------"); String str = new String ("AAA"); String str2 = new String ("AAA"); System.out.println (str = = STR2); System.out

data is transmitted to the S5800-1 through the IRF optical fiber, a part of the switch is lost ......... Good! Let's make a traffic statistics to verify this situation: Telnet 10.10.10.12 \ S5800 IP Address Sys Acl number 3876 Rule permit ip source 223.1.5.41 0 destination 223.1.5.1 0 Rule permit ip source 223.1.5.1 0 destination 223.1.5.41 0 Quit Traffic classifier aaa If-match acl 3876: Quit Traffic behavior

2016 calendarUser's environment variable:/home/user/.bash_profileSystem Environment variables:/etc/profileConfigure the. bashrc file to specify that some programs start automatically when the user logs on:One user on the system:/home/user/.BASHRCEntire system (all users):/ETC/BASHRCLinux Start-Up process Analysis BIOS self-test; Start Grub/lilo; Run the Linux kernel and detect the hardware; Run the system's first process init; Init reads the information from the system

☆ Get all the table names of the database, all the column names of the tableSelect name from sysobjects where xtype= ' u ' Select name from syscolumns where id= (select Max (id) from sysobjects where xtype= ' u ' and name= ' table name ') ☆ Recursive query dataRecursive queries in SQL statements SqlServer2005 and Oracle two versions Using Oracle before, and finding it useful for recursive queries, I studied SQL Server and found that it also supports recursive queries in SQL An example is pro

(egrep. , [Root @ nginx_back ~] # Cat test. log [Aaa] Cfg1 = aaa Xxxx = bbb Cfg2 = ccc Cfg3 = ddd [Bbb] Cfg1 = eee Yyyy = fff Cfg2 = ggg Cfg3 = hhh Cfg4 = iii [Ccc] Cfg1 = jjj Zzzz = kkk Cfg2 = lll Cfg2 = mmm Cfg2 = nnn [Root @ nginx_back ~] # Grep "c *" test. log [Aaa] Cfg1 = aaa Xxxx = bbb Cfg2 = ccc Cfg3 = ddd [Bb

; return *this; } void Mytestfunc (Cexample ex) { } }; int main (void) { cexample aaa (2); Cexample BBB (3); bbb = AAA; cexample CCC = AAA; Bbb.mytestfunc (AAA); return 0; } If you can see this as a result, congratulations, you can stand up and twist your butt, no more looking down. If y

(11),Partition P3 values less than (16)); Then, create the local index: Create INDEX IDX_TP2_C2 on TP2 (C2) local; Because the primary key is a global index, you do not need to create another global indexes, we insert the data: INSERT INTO TP2 vlaues (1, ' AAA ', ' AAA '); INSERT INTO TP2 vlaues (2, ' AAA ', ' AAA ');

program run under another ordinary userIn this case, the sleep function is not overloaded:It can be seen from the above four cases: only the user's own program to run, will use the LD_PRELOAD environment variable, overload the Sleep function, otherwise ignore the LD_PRELOAD environment variable, do not overload the sleep function.2.7 Elimination and cleanup privilegesTo be more secure, SET-UID programs typically call the SETUID () system call function to permanently purge their root permissions

file in the/tmp directory, zzz. Under root user name the following code test.c, put in the/tmp directory, compile the program, give the program root permissions. Under an ordinary user, run this program. Describe the situation you have observed,/TMP/ZZZ will this file be modified? Explain your observations.Code:#include #include #include #include #include void Main (){ Int fd; Assume That/tmp/

1, into the global configuration mode Switch-3548 > Enable Password: ******** Switch-3548 # config T Switch-3548 (config) # 2, enable the switch HTTP Server Switch-3548 (config) # IP HTTP Server 3, configure the host name Switch-3548 (config) # hostname switch-phy-3548 4, configure the root user password switch-gyx-3548 (config) # enable secret 5 zzz switch-gyx-3548 (config) # enable password zzz

Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa [html] viewplaincopy lt ;! DOCTYPEHTMLPUBLIC quot;-// W3C // DTDHTML4.01Transitional // EN quot; gt; lt; html syntax [html] view plaincopyScript function overIt () {var the_obj = event. srcElement; if (partition () = "td") {the_obj = the_obj.parentElement; the_obj.oBgc = partition; the_obj.oFc = partition; partition = '#71BAF0'; the_obj.style.color = '';}} function outIt () {var the_obj = event. srcElement; if (partition ()

Test the table space function of oracle transmission (including detailed procedures) 1. Export the table space from the source server to the source server: 10.1.122.55 target server: 10.1.122.540. note: If the character set is not set here, an error will be reported during the import. For details, see the end of the article. Suse11sp2 :~ # Export LANG = AMERICAN_AMERICA.AL32UTF8suse11sp2: ~> Export NLS_LANG = AMERICAN_AMERICA.AL32UTF8 suse11sp2: ~> Sqlplus/as sysdba SQL * Plus: Release 11.2.0.3.