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1. Create a simple script variable:Vim variable2. Modify the contents as follows:#!/bin/SHEcho "number:$#"Echo "scname:$0"Echo "First : $"Echo "second:$2"Echo "Argume:[email protected]"Echo "Show Parm list:$*"Echo "Show Process id:$$"Echo "Show Precomm stat: $?"3. Execute the Script./variableThe meaning of some parameters in a Linux shell script: $# is the number of arguments passed to the script. The name

Original URL: http://dadekey.blog.51cto.com/107327/119938let's start by writing a simple script that will explain the meaning of each variable after execution .# Touch Variable# VI VariableThe script reads as follows:#!/bin/shecho "number:$#"echo "Scname:$0"echo "First: $ $"echo "Second:$2"echo "Argume:[email protected]"echo "Show Parm list:$*"echo "Show Process id:$$"echo "Show Precomm stat: $?"Save Exit a

Original URL: http://www.cnblogs.com/fhefh/archive/2011/04/15/2017613.htmlThe meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All parameter lists. such as "$*" in the Case of

1. Mount ISO image #创建挂载点 mkdir/mnt/chroom #手动挂载iso镜像 mount-o loop-tiso9660/tmp/xxx.iso/mnt/chroom# (-t specify mount type -o Mount mode) #查看是否挂载成功 df-hcd/mnt/chroom #取消挂载 umount/mnt/chroom# #设定开机自动挂载-Method 1vi/etc/rc.d/rc.local# (The RC.D directory below corresponds to each level start-up add-on) new mount-oloop-tiso9660/tmp/ xxx.iso/mnt/chroom # #设定开机自动挂载-Method 2vi/etc/fstab new /tmp/ xxx.iso/mnt/chroomiso9660loop00 #查看开机自动挂载是否设定成功 umountmount-a2. Setting the yum source to ISO image cd/

Javascript Learning Guide 0---2 Okay. Pretty girls have read it. Let's continue with the content of the last lecture (the content of the previous section)Control statement: First, I would like to sum up a total9 Expires/expires + CgogaWYg0 ++ expires/Cw + bAtLfWsfDOqtXivLi49r/Y1sbT777kvtm49sD919MKPHA + expires = "brush: java;"> var I = 10; if (I> 15) {ale

#!/bin/bash#Created by Ley on 2014-11-14#Testing the Paramtersecho "The Compleate list is%s\n" "$$"echo "The Compleate list is%s\n" "$!"echo "The Compleate list is%s\n" "$?"echo "The Compleate list is%s\n" "$*"echo "The Compleate list is%s\n" "[Email protected]"echo "The Compleate list is%s\n" "$#"echo "The Compleate list is%s\n" "$ $"echo "The Compleate list is%s\n" "$"echo "The Compleate list is%s\n" "$ $"the meaning of shell variable $#,[email protected],$

Students who want to learn automated tests can go here.Https://www.cnblogs.com/yoyoketang/p/9108552.htmlBasic Python CoursesKeynote Teacher: Shanghai-Li Meng1. Personal Blog , Baidu Direct search: Anges li Dream2. Beep miles search Anges Li Meng3. Personal original public number : LimengketangA total of 18 bar courses, only 99 Yuan!Full 2-month, Intermediate Test Foundation Benefit CourseAnswer questions from your classmates about testing, automation,

; fromCollectionsImportCounter>>> Counter (a[1]) Counter ({')': 6186,'@': 6157,'(': 6154,']': 6152,'#': 6115,'_': 6112,'[': 6108,'}': 6105,'%': 6104,'!': 6080,'+': 6066,'$': 6046,'{': 6046,'': 6043,'*': 6034,'^': 6030,'\ n': 1221,'-': 4,'a': 1,'T': 1,'I': 1,'L': 1,'': 1,'y': 1,'>': 1,'u': 1,'e': 1,'Q': 1})It's kind of interesting.Because the HTML is too large, I open it directly with Urlopen () and then take the regular expression out of that part (of course, in order to show the superiority of

Http://kodango.com/useful-documents-about-shell$$ the shell itself PID (ProcessID)$! PID of the Shell's last running background process$? The return value of the last command that was run to check whether the previous command executed successfully.$* all parameter lists, as a whole.[email protected] all parameter lists. Alone as a whole.$# the number of arguments added to the shell.The file name of the Shell itself."Shell Learning Notes" $#,[email protected], explaining the meaning of $

Anonymous functions:calc=Lambda x:x*3print(Calc (3)) # return 9Higher order functions: You can pass a function name as an argument to another function The return value can contain a function name Adorner :Essentially a function that adds additional functionality to other functions Cannot modify the source code of the decorated function Cannot modify the method of invocation of a decorated regret Simple Adorner example-run time for statistical functions:Im

There are three different parameters to the function: General parameters Default parameters Dynamic parameters# ######### define function ########## name is called the formal parameter of function func, abbreviation: Parameterdef func (name):Print (name)# ######### Execute function ########## ' Fuyuteng ' is called the actual argument of function func, abbreviation: argumentFunc (' Fuyuteng ') def func (name, age = 18print (" %s:%s (name,age)) # specify parameter func ( ' fuyuteng ", 19)

= Req.query.filetype ? ('. ' + req.query.filetype): '. png '; var newfilename = ' Upload_ ' + Moment (). Format (' x ') + math.random (). toString (). substr (2,) + '. ' + fileType; var readstream = Fs.createreadstream (File.path); var writestream = Fs.createwritestream (Uploadpath + newfilename); var deferred = Q.defer (); Readstream.pipe (Writestream); Readstream.on (' End ', Deferred.makenoderesolver ()); Return Deferred.promise.then (function ()

The string $s = ' A, B, C (x, y ("Z", 2, 0)), D, E '; Split into arrays, the difficulty is C (x, y ("Z", 2, 0)), is a whole. Desired Result: Array ' A ', ' B ', ' C (x, y ("Z", 2, 0)) ', ' D ', ' E '); Reply to discussion

Preface In Linux, all devices are regarded as files. Each time a file is opened, there is a file descriptor that represents the file to be opened. When the program starts, three I/O device files are opened by default: stdin, stdout, and stderr. The file descriptors 0, 1, and 2 are obtained respectively. Instance Now let's look at an example of testing the ttyname function (the ttyname function returns the p

server available, giving up.VFS: Unable to mount root FS via NFS, trying floppy.VFS: cannot open root device "mtdblock2" or unknown-block (2, 0)Please append a correct "root =" Boot option; here are the available partitions:Kernel panic-not syncing: VFS: Unable to mount root FS on unknown-block (2, 0) [Solution proces