Recent questions tagged shell

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I want to execute a command as root with shell_exec. Now I know this is dangerous, but believe me, you need to ... . How can I get this done? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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666 views

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shell - Piping stdin to R

I am having trouble piping stdin to an R script. Here is my toy script test.R: #!/usr/bin/env Rscript ... Is there anything that I missed? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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982 views

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shell - Windows shortcut to run a Git Bash script

Assuming I have a test.sh script that runs a server and Git Bash installed, how do I create a Windows shortcut ... see the output of the server? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - Calling an executable program using awk

I have a program in C that I want to call by using awk in shell scripting. How can I do something like this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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842 views

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shell - How to run commands via NodeJS child process?

I am trying to run commands on Windows via NodeJS child processes: var terminal = require('child_process').spawn(' ... get no response from cmd. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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713 views

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shell - Comparing PHP version numbers using Bash?

I have this script that should make sure that the users current PHP version is between a certain range, though it SHOULD ... - 5.3.15" exit fi See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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786 views

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shell - Is there a way to make bash job control quiet?

Bash is quite verbose when running jobs in the background: $ echo toto& toto [1] 15922 [1]+ Done echo ... way to remove this superfluous output? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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949 views

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shell - Trim leading and trailing spaces from a string in awk

I'm trying to remove leading and trailing space in 2nd column of the below input.txt: Name, Order?? Trim ... trailing spaces are not removed. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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946 views

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shell - Remove part of path on Unix

I'm trying to remove part of the path in a string. I have the path: /path/to/file/drive/file/path/ I want ... ...maybe there is an easier way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - How to grep a text file which contains some binary data?

grep returns Binary file test.log matches For example echo "line1 re x00 line2 line3 re " > test.log # in zsh ... data, to let grep work again? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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708 views

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shell - How can I redirect the output of the "time" command?

I tried to redirect the output of the time command, but I couldn't: $time ls > filename real 0m0.000s user 0m0. ... couldn't and how to do this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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698 views

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shell - How to create nonexistent subdirectories recursively using Bash?

I am creating a quick backup script that will dump some databases into a nice/neat directory structure and I ... /$client/$year/$month/$day" See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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805 views

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shell - commands not found on zsh

I am using the z Shell (zsh) instead of the default bash, and something wrong happen so that all commands that ... ? Why all commands are lost? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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774 views

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shell - How to run a command in the background and get no output?

I wrote two shell scripts a.sh and b.sh. In a.sh and b.sh I have a infinite for loop and they print ... I want to hide the output in terminal. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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648 views

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shell - How does AND and OR operators work in Bash?

I tried the following command on bash echo this || echo that && echo other This gives the output this other ... inputs would be very helpful! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

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shell - passing multiple dates as a paramters to Hive query

I am trying to pass a list of dates as parameter to my hive query. #!/bin/bash echo "Executing the ... on tran_date column with string type. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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894 views

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shell - Bash conditional based on exit code of command

In Bash, I would like an if statement which is based of the exit code of running a command. For example: # ... How would I achieve this? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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833 views

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shell - Can I ssh somewhere, run some commands, and then leave myself a prompt?

I find myself needing to log into various servers, set environment variables, and then work interactively. e.g. $ ssh ... 'd run them by hand?' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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911 views

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shell - In a bash script/command how can I make a PC beep noise, or play a sound file?

I have some long running scripts with breaks requiring input/interaction to continue but when I switch to another ... Grrr... Problem solved. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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724 views

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shell - How to input a path with a white space?

I have a main file which uses(from the main I do a source) a properties file with variables pointing ... another variable $COMPANY in the path See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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815 views

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shell - How to check if a process is running inside docker container?

[Updated1] I have a shell which will change TCP kernel parameters in some functions, but now I need to make ... 1:cpuset:/ No /lxc/containerid See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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718 views

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shell - Bash: Copy named files recursively, preserving folder structure

I was hoping: cp -R src/prog.js images/icon.jpg /tmp/package would yield a symmetrical structure in the ... to be no equivalent for cp. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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662 views

1 answer

shell - Finding most changed files in Git

How can I show files in Git which change most often? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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745 views

1 answer

shell - Concatenating multiple text files into a single file in Bash

What is the quickest and most pragmatic way to combine all *.txt file in a directory into one large text file? ... but I doubt there is one. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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644 views

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shell - How can I find encoding of a file via a script on Linux?

I need to find the encoding of all files that are placed in a directory. Is there a way to find the ... move the file to another directory. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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629 views

1 answer

shell - Unix find command, what are the {} and ; for?

With this set of commands, what are the {} and ; characters for? find . -name '*.clj' -exec grep -r resources {} ; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

1 answer

shell - How can I check the version of sed in OS X?

I know if sed is GNU version, version check can be done like $ sed --version But this doesn't work in OS X. How can I do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

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shell - Do a tail -F until matching a pattern

I want to do a tail -F on a file until matching a pattern. I found a way using awk, but IMHO my command ... know a better way to do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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