Recent questions tagged shell

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shell - executing bash loop while command is running

I want to build a bash script that executes a command and in the meanwhile performs other stuff, with ... Could you please suggest something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - How do I set MySQL temporarily to read-only through the command line?

I'm creating a bash script which, among other things, gathers some data from a MySQL database. My MySQL user ... do this from a command line? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - How to remove trailing whitespaces for multiple files?

Are there any tools / UNIX single liners which would remove trailing whitespaces for multiple files in-place. E. ... the conjunction with find. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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872 views

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shell - Sync MongoDB Via ssh

Unlike Mysql, I found it quite challenging trying to sync MongoDB files - They can not be piped back, since ... blob/master/scripts/db/db-sync See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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981 views

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shell - What is the use case of noop [:] in bash?

I searched for noop in bash (:), but was not able to find any good information. What is the exact purpose or ... it is mandatory to use it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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973 views

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shell - How do I launch a Git Bash window with particular working directory using a script?

How can I launch a new Git Bash window with a specified working directory using a script (either Bash or ... working directories from a script. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Run a string as a command within a Bash script

I have a Bash script that builds a string to run as a command Script: #! /bin/bash matchdir="/home/joao/ ... "runnning: ") it works fine. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Mongodb - Difference between running "mongo" and "mongod" databases

So, I'm sure I'm missing something simple here, but when I run mongo as a daemon (using mongod --fork or ... get at my data when running mongod? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Open a file from Cygwin

Is there an equivalent to OSX open command in cygwin. open opens a file with the default application for that ... "cygwin-double-click" command. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Error: EACCES: permission denied, access '/usr/lib/node_modules'

I am trying install typescript with command npm install -g typescript, and it returns this error: npm ERR ... directories need that permission? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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885 views

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shell - Listing only directories in UNIX

I want to list only the directories in specified path (ls doesn't have such option). Also, can this be done with a single line command? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Does variable=$(...) store the command or the result of the command in POSIX sh

I was wondering: When I e.g. call list=$(ps -ax) is ps -ax executed once and I can read the ... the command executed every time I call $list See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - bash script execute command with double quotes, single quotes and spaces

I've looked at the similar posts about this problem, but cannot figure out how to get the executed code to ... the command with the option? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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940 views

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shell - Bash for loop syntax

I'm working on getting accustomed to shell scripting and ran across a behavior I found interesting and unexplained. In ... bash version 3.2.57. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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998 views

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shell - Command line php mysqli fails but works via web server and works in local

I have a shell script that calls a php script to insert records in database after parsing text file. When it ... and other bits in the script. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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shell - Running File from Notepad Plus Plus and Current Directory

There are a number of examples on the web of how to run a file from the Notepad Plus Plus (NPP). But they ... tweak it to work in Windows XP? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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799 views

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shell - Bash - Search and Replace operation with reporting the files and lines that got changed

I have a input file "test.txt" as below - hostname=abc.com hostname=xyz.com db-host=abc.com db-host=xyz. ... will be an overkill for this task. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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861 views

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shell - Bash completions with equals sign and enumerable flag values

I'm trying to construct a bash completion routine that will suggest command lines flags and suitable flag ... nospace -F _fstcompose fstcompose See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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842 views

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shell - What is the simplest method to join columns from variable number of files using bash script?

I have input files in one directory. All the input files have the same format and I'd like to join certain ... please point me to the answer. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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shell - How to input special character in cmd?

I have written a c program that retrieves arguments from the command line under Windows. One of the ... these special character? thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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shell - Automatically close MsgBox in vbscript?

I am using VBScript to code some automation on excel. I have a MsgBox() within the code, and am ... execution would continue from there. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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911 views

1 answer

shell - Word splitting in Bash with IFS set to a non-whitespace character

I'm going through a Bash tutorial, and specifically the subject of word splitting. This script, called "args", helps ... $a $b $c one two three See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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shell - Why diff with ignore matching lines doesn't work as expected?

I have the following files: file1.txt: ################################################### Dump stat Title information for ' ... and Title. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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833 views

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shell - Is a semicolon prohibited after NAME in `for NAME do ...`?

The bash manual lists the syntax for the for compound statement as for name [ [ in [ word ... ] ] ; ] do ... term is at least one newline or ;. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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951 views

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shell - Use PS0 and PS1 to display execution time of each bash command

It seems that by executing code in PS0 and PS1 variables (which are eval'ed before and after a prompt command ... How would you approach this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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899 views

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shell - Determine whether process output is being redirected in C/C++

I'm writing command line utility for Linux. If the output (stdout) is going to a shell it would be nice to print ... C/C++ to write my utility. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

shell - R system functions always returns error 127

I need to execute an external tool from R and process errors (if any) occurred in that tool. I know 3 ... '"start notepad"' had status 127 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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960 views

1 answer

shell - How do you parse a filename in bash?

I have a filename in a format like: system-source-yyyymmdd.dat I'd like to be able to parse out the different ... using the "-" as a delimiter. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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