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Shell script variable $#,$*,$$,$@,$0,$1,$2,$? meaning __shell Script

Parameter description 1:$# indicates the number of incoming arguments executed by the script 2:$* indicates that the execute script passes in the argument list 3:$$ represents the Process ID 4:$@ indicates that the execute script passed in all parameters 5:$0 to execute script name 6:$1 represents the first parameter 7:$2 represents a second parameter 8:$

The meaning of Shell scripting variable $#,$*,$$,$@,$0,$1,$2,$?

Parameter description1:$# indicates the number of arguments passed into the script2:$* indicates the execution of a script passed in the parameter list3:$$ represents the Process ID4:[email protected] means that the execution script passes all parameters5:$0 represents the execution script name6:$1 represents the first parameter7:$2 represents the second argument8:$? Indicates script execution status

1106:0 start-up algorithm 13--find the number of minutes between 2 time

1106:0 start-up algorithm 13--2 minutes between time limit:1 Sec Memory limit:64 MB 64bit IO Format:%lldsubmitted:4320 accepted:1602[Submit] [Status] [Web Board] DescriptionWater problemInputEnter 2 lines, which are 2 times, between hours and minutes: separated (Subject contains multiple sets of test data)Outp

Discuz! NT 2.x-3.5.2 SQL injection (0 day) and official patch

Author: Jannock Affected Version: Discuz! NT 2.x-3.5.2Http://www.discuz.net Vulnerability Type: SQL InjectionVulnerability Description: Discuz! NT is a powerful community software under Comsenz. It is based on the ASP. NET platform.Vulnerability Analysis: ajaxtopicinfo. ascx poster SQL Injection VulnerabilityArbitrary User Control calling vulnerability combined with ajax. aspxIn the admin/UserControls/ajaxtopicinfo. ascx File Go to the GetCondition fu

0-2 How to install Minikube

Installation Requirements:The BIOS of your computer must be enabled Vt-x or amd-v virtualizationInstalling hypervisorMacos:virtualbox or VMware Fusion, or Hyperkit.Linux:virtualbox or KVM.Note:The Minikube also supports the--vm-driver=none option, which can be run directly on the host instead of on the VM. With this option, Docker is required, not hypervisor.Installing KubectlRefer to the installation documentation for 0-1Installing MinikubeInstall ac

This condition 1 and (0 OR condition 2) How logical operations are understood

This condition 1 and (0 OR condition 2) logical operation how to understand?

Caffe FCN Test | Check Failed:error = = cudasuccess (2 vs. 0) out of memory

When using Caffe run FCN test, the following error is prompted:Check Failed:error = = cudasuccess (2 vs. 0) out of memoryis the memory overflow, and is the Cuda, then the GPU cache overflow.In this case, the first thing to see is the training and testing of the batch_size, and the training process is no problem, indicating that the training batch_size no problem;This problem with the test process, see the F

Course three (structuring machine learning Projects), second week (ML Strategy (2))--0.learning goals

Tags: deviation chinese data cts You multitasking performance GPO ESCLearning Goals Understand what multi-task learning and transfer learning is Recognize bias, variance and data-mismatch by looking in the performances of your algorithm on train/dev/test sets "Chinese Translation"Learning GoalsLearn what multi-tasking learning and migration learning identify deviations, variances, and data mismatches by viewing the performance of the algorithm on the training/dev/test setCourse three

PHP design Pattern Notes and summaries (2) developing the PSR-0 framework

' (length=45) requireBASEDIR. ' /‘.Str_replace(‘\\‘, ‘/‘,$class).‘. Php; }}common/object.php:phpnamespace Common; class Object { staticfunction Test () { echo__method__, ' ; }} // there must be no executable statement other than the object classapp/controller/home/index.php:phpnamespace app\controller\home; class index{ staticfunction Test () { echo__method__, ' ; }}When you run the Portal file index.php, app/controller/home/index.php and common/object

The meaning of the shell variable $ #, $ @, $0, $1, $2 in linux

The meaning of the shell variable $ #, $ @, $0, $1, $2 in linuxVariable description $ shell's PID (processID) $! Background ProcessID $? End code of the last command (Return Value) $-Flag list Set using the Set command $ * List of all parameters. For example, if "$ *" is enclosed by "$1 $2 $3... $ n", all parameters are output. $ @ List of all parameters. For exa

12400-3, 2, 1, 0 (mathematical thinking Questions & amp; high precision or table)

223222233322323233233233232332323332222222332323322232332233323222222322333223322323322332232332222333222233333323332322232232232222233232332323332232222233323332233323223222232232232232332222333332332333333332223233333323323232223232;int cnt[2][mx];int main(){for (int i = 1; i Code for table creation: (enter 999 999 999) /* 1.802 s */import java. io. bufferedInputStream; import java. math. bigInteger; import java. util. *; public class Main {sta

Error: (2, 0) Plugin with id ' com.github.dcendents.android-maven ' not found workaround

When importing open source projects, you always report this mistake.Error: (2, 0) Plugin with id ' com.github.dcendents.android-maven ' not foundWorkaround:First add global dependencies to the Build.grade under projectBuildscript { repositories { jcenter () } dependencies { ' Com.android.tools.build:gradle : 1.5.0 ' //1. Automated Maven Packaging plugin ' com.github

The meaning of shell variable $#,$@,$0,$1,$2 in Linux is explained:

Variable Description:$$ Shell本身的PID(ProcessID) $! Shell最后运行的后台Process的PID $? 最后运行的命令的结束代码(返回值) $- 使用Set命令设定的Flag一览 $* 所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。 [emailprotected] 所有参数列表。如"[emailprotected]"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。 $# 添加到Shell的参数个数 $0 Shell本身的文件名 $1~$n Example:#!/b

Explanation of the meaning of the Linux shell variable $#,$@,$0,$1,$2

Variable Description:$$ the shell itself PID (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. All arguments are considered to be a string[email protected] all parameter lists. argument is a separate string$# number of arguments added to the shellThe file name of the shell itself$1~ $n Each parameter value added to the shell. $ $ is the 1th argument, and the $ = is the

SAE Local Environment error [python][dictionary Update sequence element #0 have length 1; 2 is required]

When building the SAE Python environment locally, the following error is always reported:1F:\workspace\dev\python\frikyskice\1>dev_server.py2 Traceback (most recent):3File"C:\Python27\Scripts\dev_server.py", line 205,inch4 Main (options)5File"C:\Python27\Scripts\dev_server.py", line 165,inchMain6Options.__dict__. Update (CONF)7Valueerror:dictionary Update Sequence Element#0 have length 1; 2 is requiredLooki

The meaning of shell variable $#,$@,$0,$1,$2 in Inux

Transferred from: 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

TensorFlow starting from 0 (2)--Visual debugging tool Tensorboard

Tensorboard Tensorboard's official website tutorials are as follows:Https://www.tensorflow.org/versions/r0.7/how_tos/summaries_and_tensorboard/index.html A simple explanation: Tensorboard is a visual tool that can be used to view TensorFlow diagrams and various values and images in the process.1. Add "Summary operations" to the desired node in the TensorFlow program, and "Summary operations" collects the node's data and marks the previous step, timestamp, and other identifiers to write to the e

Windows Network Programming (2)--Overlapping i/0 models

Freebufferobj (Pbuffer_obj pbuffer)4. Based on the handle of the trusted event object, find the corresponding buffer_objPbuffer_obj findbufferobj (HANDLE hevent)5. Update event handle array g_eventsvoid Rebuildarray ()6. Receive SendThe Buffer_obj object that receives the connection. Function used: postacceptThe Buffer_obj object that receives the data. Function used: POSTRECVThe Buffer_obj object that sends the data. Function used: PostsendImplementation steps:1. Set the I/O type to increase t

What is the meaning of variable $#,$@,$0,$1,$2,$*,$$,$ in Linux?

$# is the number of arguments passed to the script. $ is the name of the script itself. $ is the first parameter passed to the shell script, and the second argument that is passed to the shell script is [email protected] is a list of all the parameters passed to the script $*is to display all parameters passed to the script in a single string, unlike positional variables, which can be more than 9 $$ is the current process ID number for the script to run? is to display the exit status of the last

Explanation of the meaning of shell variable $#,$@,$0,$1,$2 in Linux

The 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 "" ", in the form of" $ $ ... $n "output all parameters.[Email protected]A

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