command-line

What is cp: cannot stat error in Unix, I get this error when trying to copy thing from one folder to another

◇◆丶佛笑我妖孽 提交于 2020-05-12 11:06:29
问题 Hi I wanted to know why I am getting this error. I have this directory called mock, which inside has another 3 directories. I am trying to copy all the items from mock directory into the projweek directory using the below code. cp /mock/* ~/projweek But I get this error cp: cannot stat ‘mock/*’: No such file or directory any ideas as to why that is? 回答1: If your source directory is set in quotes, then make sure that the * is outside the quotes, i.e. cp "source/"* dest or cp "source"/* dest

How to install JQ on Mac by command-line?

 ̄綄美尐妖づ 提交于 2020-05-09 18:37:08
问题 I need to know the most efficient way of installing JQ on Mac (el capitan). The code is downloaded to my mac but I would like to know how I can install and operate the via the command line. 回答1: You can install any application/packages with brew on mac. If you want to know the exact command just search your package on https://brewinstall.org and you will get the set of commands needed to install that package. First open terminal and install brew ruby -e "$(curl -fsSL https://raw

How to get Maven groupId, artifactId & project version to the command line

半城伤御伤魂 提交于 2020-05-09 18:32:05
问题 I would like to retrieve from the command line the groupId, the artifactId & the version of a Maven project. The proposed solution in this topic "How to get Maven project version to the bash command line" is to use the following plugin: mvn org.apache.maven.plugins:maven-help-plugin:2.2:evaluate -Dexpression=project.artifactId It works well but I can't figure out how to set, at the same time, the project.groupId, project.artifactId & project.version to the -Dexpression argument. I would avoid

How to directly invoke the system shell in Go (golang)?

我们两清 提交于 2020-05-09 17:28:40
问题 As per the golang documentation, go does not make a call to the system's shell when you are using exec.Command(). From the golang.org documentation on the "os/exec" package: Unlike the "system" library call from C and other languages, the os/exec package intentionally does not invoke the system shell and does not expand any glob patterns or handle other expansions, pipelines, or redirections typically done by shells. This presents a problem. Because of this design choice you cannot use piping

How to directly invoke the system shell in Go (golang)?

给你一囗甜甜゛ 提交于 2020-05-09 17:27:17
问题 As per the golang documentation, go does not make a call to the system's shell when you are using exec.Command(). From the golang.org documentation on the "os/exec" package: Unlike the "system" library call from C and other languages, the os/exec package intentionally does not invoke the system shell and does not expand any glob patterns or handle other expansions, pipelines, or redirections typically done by shells. This presents a problem. Because of this design choice you cannot use piping

databricks configure using cmd and R

[亡魂溺海] 提交于 2020-05-07 09:17:09
问题 I am trying to use databricks cli and invoke the databricks configure That's how I do it from cmd somepath>databricks configure --token Databricks Host (should begin with https://): my_https_address Token: my_token I want to invoke the same command using R. So I did: tool.control <- c('databricks configure --token' ,'my_https_address' ,'my_token') shell(tool.control) I get the following error Error in system(command, as.integer(flag), f, stdout, stderr, timeout) : character string expected as

Increment variable value by 1 ( shell programming)

佐手、 提交于 2020-04-29 07:19:29
问题 I am a beginner to shell programming and it sounds like a very stupid question but i cant seem to be able to increase the variable value by 1. I have looked at tutorial but it only shows how to add together 2 variables I have tried the following methods but it doesnt work i=0 $i=$i+1 # doesnt work , command not found echo "$i" $i='expr $i+1' # doesnt work , command not found echo "$i" $i++ # doesnt work , command not found echo "$i" How do i increment the value of a variable by 1?? 回答1: You

Download many URLs in csv file and save as in Linux [closed]

泪湿孤枕 提交于 2020-04-18 05:44:34
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last month . I have a csv file which has two columns: column A for image links and column B for names. First and second columns are comma separated. I need to download all files in column A and assign them names in column B. I have tried the syntax below: #!/bin/bash while IFS=',' read -r url

'$' is not recognized as an internal or external command

夙愿已清 提交于 2020-04-16 05:00:23
问题 I have search quite extensively for an answer to this question and have not found one that address my particular issue. It involves the command line in windows. I am trying to follow a tutorial on using npm. All of the commands in this tutorial begins with $ this symbol, the dollar sign. When I type '$ npm config list' to get the configuration I get the not recognize message. Other similar questions describe other symbols or commands but not the '$' dollar sign. If anyone else has experienced

How to fix: error: '<filename>' does not have a commit checked out fatal: adding files failed when inputting “git add .” in command prompt

帅比萌擦擦* 提交于 2020-04-12 18:04:16
问题 I'm trying to add a ruby rails file to my repository in gitlab but it somehow wouldn't allow me to add the file saying that my file does not have commit checked out. I've tried git pull, making the the file again and git adding but still wont work error: '172069/08_lab_routes_controllers_views_172069_172188-Copy/adventure_game/' does not have a commit checked out fatal: adding files failed 回答1: If you have a subdirectory with a .git directory and try to git add . you will see this message.