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://www.archlinux.org/download/FreebsdSystem: BSDBased on: IndependentOrigin: United StatesArchitecture: ARM, Armel, i386, IA64, MIPS, Mipsel, SPARC64, PC98, PowerPC, POWERPC64, PS3, x86_64, XboxDesktop: Afterstep, Blackbox, Enlightenment, Fluxbox, GNOME, ICEWM, KDE, LXDE, Openbox, Wmaker, XFCECategory: Desktops, firewalls, serversFreeBSD is a UNIX operating system, which is an important branch of UNIX developed by BSD, 386BSD and 4.4BSD. FreeBSD provi

; "src=" Https://s2.51cto.com/wyfs02/M01/06/B8/wKiom1m85lDw0iYbAAAyLHfzVaU358.png "title=" 555. PNG "alt=" Wkiom1m85ldw0iybaaaylhfzvau358.png "/>650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M01/06/B9/wKiom1m87SvAGP_eAAA8QIQAXz4874.png "title=" 666. PNG "alt=" wkiom1m87svagp_eaaa8qiqaxz4874.png "/>select Loop statementUsage:The select variable name in list is similar to the for statement, as are the routines.DoCircular Body CommandDoneThe Select loop is used primarily to create menus,

loop body by default. In the continue example, if you change to break, only 1-4 is printed, because the 5 trigger breaks out of the loop after it is not printed.8. Loop Control Shift CommandShift [N]n is used to move the list of parameters to the left for a specified number of times, with the default shift left once.Parameter list once moved, the left-most argument is removed from the list. The while loop iterates through the position parameter list, often to shift.Example#!/bin/bashwhile (($#>

four dividers are as follows:PS1:/DEV/HDA1 (1-100)Ps2:/dev/hda2 (101-200)Ps3:/dev/hda3 (201-300)PS4:/DEV/HDA4 (301-400)These four sets of delimited information becomeMainOrextending the divider slot。The advantages of separation: Data security, high performanceIn fact, you can separate a hard disk into more than 10 slots using the extended split method.The purpose of the extended segmentation is to use the additional sectors to record the segmentation

!!.." Echo-e "\ n";; q| Q|quit|exit) exit;; *) echo-e "\n$var Enter error...\n" Esacdone Additional:　　# cat select.sh #!/bin/bashps3= ' Choose one: ' #select default to use PS3 to do a prompt echoselect var in $ (for I in {A). D};d o echo $i;d one) Doechoecho "Your choose is $var" echo "OK" Echobreak # jump out of SELECT, otherwise dead Loop done# #./select.sh1) A2) B3) C4) D Choose One:3your Choose is cok# if omitted in list then [email

_version break donedone# bash Test.sh1) 5.12) 5.6#?15.11) 5.12) 5.6#? 25.61) 5.12) 5.6If you judge the number of user input to execute the corresponding command, if the multi-branch with the IF statement is much more complex, with case statement is much simpler.#!/bin/bashps3= "selectanumber:" whiletrue;doselect Mysql_versionin5.15.6quit;docase $mysql _versionin5.1) echo "MySQL 5.1 " break;; 5.6) echo "mysql5.6" break ;; quit) exit ;; *) echo "Inputerror,please enteragain! " break NBSP;NB

starting with LC_ Oldpwd Previous working directory Path command to search for paths. A list of directories separated by colons, which the shell uses to search for commands, a common value of/usr/gnu/bin:/usr/local/bin:/usr/ucb:/usr/bin PPID Process ID of the parent process PS1 main prompt string, default value is $ PS2 prompt string, default value is > PS3 the Select Prompt string to use with the Select command, the default value is #? PS4 the defau

This time about the Linux mascot * Penguin *All know that the mascot of Linux is Penguin, but what is the name of this penguin? Its name is "tux", note is not "tax" (tax).Specific Reference wiki: Chinese explanation Explanations in English are more detailed: English explanationsWhen the Linux kernel developed to v2, the logo design competition was held and the Penguin logo was finally selected.Other alternate logo works see: Linux logo alternates (many of which have "linux 2.0")Tux is displayed

terminal name[[email protected] ~]# lastcomm ls via command name[[email protected] ~]# lastcomm Oracle query by user name[Email protected] ~]# LastcommCrond SF Root __ 0.03 secs Sat 19 20:01Run-parts Root __ 0.03 secs Sat 19 20:01The S command is performed by the super userThe F command is generated by fork, but no execD command terminates and creates a core fileX command terminated by Sigterm signal[[email protected] ~]# SA32918.77re 0.02CP 15590k2 103.78re 0.00cp 17840k sshd2 0.00re 0.00cp 40

= "ZH_CN. Gb18030″Lc_collate= "ZH_CN. Gb18030″Lc_monetary= "ZH_CN. Gb18030″Lc_messages= "ZH_CN. Gb18030″Lc_paper= "ZH_CN. Gb18030″Lc_name= "ZH_CN. Gb18030″Lc_address= "ZH_CN. Gb18030″Lc_telephone= "ZH_CN. Gb18030″Lc_measurement= "ZH_CN. Gb18030″Lc_identification= "ZH_CN. Gb18030″Lc_all=The default language is en_US. UTF-8 or POSIX, set to ZH_CN. GB18030.Second, vim display ChineseAfter installing the Chinese package, you also need to edit the VIM profile VIMRC:Vim/etc/vimrcAt the end, add the fo

: printing 1 to 10 with a for double-brace C language style650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M02/86/3B/wKiom1e5csnQsVZ2AAAtJPuiEqI484.png "title=" 28.png "alt=" Wkiom1e5csnqsvz2aaatjpuieqi484.png "/>Select loops and MenusSelect variable in List;doCircular Body CommandDoneThe Select loop is used primarily to create menus, and menu items in numerical order are displayed on standard errors, and a PS3 prompt is displayed, waiting for

choose, the execution will exit, and select is actually a loop, and the function of break is to exit the loop![[emailprotected]sbin]#sh3.sh1) 5.12) 5.6#?NBSP;1YOUNBSP;CHOOSENBSP;THENBSP;5.1[[EMAILNBSP;PROTECTED]NBSP;SBIN]#NBSP;SHNBSP;3.SH1) 5.12 ) 5.6#?2 /Choice is the one in front "#? "Symbol can be modified, can be modified with PS3, the following script youchoosethe5.6 [Email protected] sbin]# vim 3.sh#!/bin/bashps3= "Please select a number:"/Ad

Chapter NO. 0 Introduction to Computer science Computer: Receiving the user input instruction and data, after processing the data of the central processor and the logical unit, to produce or store the useful information. The composition of the computer: the input unit, the output unit, the control unit inside the CPU, the arithmetic logic unit and the memory five parts. Note: The actual data that the CPU is going to process is completely from memory. CPU Classification: (actually there are some

the internet has said that the IIS Admin Service is possible, there may be some situations can be, we pay attention toPS2: "Identity" of the application pool, if LocalSystem not, then set up "Custom account", account with Administrator account (administrator)PS3: This effect may be a little different from what the WinForm desktop program does, such as the EXE program I called, which has a command-line form that appears after the WinForm call, and the

If you see the Webcenter Space app (Webcenter.ear) from the WebLogic console, the session timeout (3,600 seconds) session timout is misleading and is not applicable in the case of webcenter space applications. If you update the value from the console, it does not affect the session time-out of the Webcenter space application. Then, the question is how can I change the Webcenter space app session timeout? The default session timeout in Web. XML is set to 45 minutes. There are two ways to change t

= =" -"] Then ln-s $FILEVG 355 $FILEVG fi fi V, Cat/etc/Profile # Set PATH environment variable path=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin PS1='[\[email protected]\h \w]\$'# The message format displayed in the shell export path # Exports path bit environment variable alias ll='ls-l'# Set command aliases alias La='ll-a'Export PS1='\[email protected]\h \w$'# Exporting some environment variables export PS2='>'Export PS3='? 'Export PS4='[$LINENO]+

be some situations can be, we pay attention toPS2: "Identity" of the application pool, if LocalSystem not, then set up "Custom account", account with Administrator account (administrator)PS3: This effect may be a little different from what the WinForm desktop program does, such as the EXE program I called, which has a command-line form that appears after the WinForm call, and the WebService call does not have a command-line form, but through the task

compound statement. PS2: It is recommended to use the first or third format, the if statement for a row , or a multi-line if compound statement. This will not cause confusion because of multiple statements. PS3: Compound statements We generally like to weigh as: blocks of code. if ( conditional expression ) { statement ;} else { statement ;} var box = 100;if (Box > 50) {Alert (' box greater than '); // condition is trueto execute this

, through the test show Vg248qe time is 4ms, which is by far the most sensitive monitor. Over the former king Acer GN245HQ. As a result, Asus VG248QE is the best choice for gamers, especially those who are looking for a FPS that will be able to reach a traditional CRT display with unlimited response time. If you already have an Nvidia 3D Vision 2 or if you plan to buy it, then this 24-inch display can be used to play 3D games. Unlike Asus ' vg278h, it is compatible with 3D sources a

1. Drive Acceleration DirectX 10 There is no doubt that the DirectX 10 support for Vista gives Vista gaming a more than imagined Windows gaming environment, leading to more than Microsoft's own Xbox 360 gaming console and Sony's PS3 game console vision. When the DX10 game is launched, there will be a qualitative improvement in the visual fidelity. 2.Crysis Developed by the German Crytek company Crysis 3D Graphics Technology in the gaming industry r