Recent questions tagged bash

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How can I use AWK to compute the median of a column of numerical data? I can think of a simple algorithm but I can't ... NR/2)+1 and (NR/2)-1. See Question&Answers more detail:os...

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

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637 views

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bash - Check wget's return value

I'm writing a script to download a bunch of files, and I want it to inform when a particular file ... unary operator expected What's wrong? See Question&Answers more detail:os...

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

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780 views

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bash - removing lines between two patterns (not inclusive) with sed

Ok I know that this is trivial question but: How can i remove lines from files that are between two known ... sed?? With many clear examples? See Question&Answers more detail:os...

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

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853 views

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bash - How to mark an array in POSIX sh?

While replacing external commands in a shell script, I used an array to get rid of awk's NF. Now, since I moved ... 's not what I look for.) See Question&Answers more detail:os...

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

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618 views

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bash - Cannot install NPM using curl

Receiving this error when attempting to install NPM. Any help on this error is greatly appreciated. $ curl http:// ... failed" >&2 fi exit $ret See Question&Answers more detail:os...

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

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895 views

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bash - Vim not recognizing aliases when in interactive mode?

Same question as this, however the solution there didn't work. I set these variables in my ~/.vimrc: set ... on both OS X and Ubuntu. See Question&Answers more detail:os...

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

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622 views

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bash - Importing shell script function

I have a function err() in file abc. The files do not have a .sh extension, but they start with #!/bin/ ... Is this the right way of importing? See Question&Answers more detail:os...

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

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702 views

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bash - awk: find minimum and maximum in column

I'm using awk to deal with a simple .dat file, which contains several lines of data and each line has 4 ... where I was wrong? Thank you! See Question&Answers more detail:os...

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

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941 views

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bash - Why am I getting a 'unary operator expected' error?

I'm writing a shell script to streamline my development workflow. It takes an argument as to which theme folder ... ==: unary operator expected See Question&Answers more detail:os...

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

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652 views

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bash - Make shopt change local to function

I'm trying to write a bash function that uses nocasematch without changing the callers setting of the option. The ... and reset it before exit. See Question&Answers more detail:os...

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

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896 views

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bash - ansible wget then exec scripts => get_url equivalent

I always wonder what is the good way to replace the following shell tasks using the "ansible way" (with get_url, etc ... .com/setup_5.x | bash - See Question&Answers more detail:os...

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

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780 views

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bash - How to delete the first column ( which is in fact row names) from a data file in linux?

I have data file with many thousands columns and rows. I want to delete the first column which is in fact ... column. Could anybody guide me? See Question&Answers more detail:os...

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

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667 views

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bash command to convert html page to a text file

I am a beginner to linux. Would you please help me how to convert an html page to a text file. the text ... results for "computers". Thank you See Question&Answers more detail:os...

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

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643 views

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bash - Grab the filename in Unix out of full path

I am trying to get "abc.txt" out of /this/is/could/be/any/path/abc.txt using Unix command. Note that /this ... be/any/path is dynamic. Any idea? See Question&Answers more detail:os...

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

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3.2k views

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bash - Jenkins: Pipeline sh bad substitution error

A step in my pipeline uploads a .tar to an artifactory server. I am getting a Bad substitution error when ... issues in any other places. See Question&Answers more detail:os...

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

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557 views

1 answer

bash - use external python script to open maya and run another script inside maya

Is it possible to call a script from the command prompt in windows (or bash in linux) to open Maya and then ... and go. Thanks for the help! See Question&Answers more detail:os...

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

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631 views

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bash - Replace delimited block of text in file with the contents of another file

I need to write a simple script to replace a block of text in a configuration file with the contents of another ... this simply with awk or sed. See Question&Answers more detail:os...

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

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806 views

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bash - Where do I set environment variables for Django?

everyone! Django 1.11 + PostgreSQL 9.6 + Gunicorn + Ubuntu 16.04 in AWS I want to set environment variables for ... I say, django can't read. See Question&Answers more detail:os...

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

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895 views

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bash - Add space between every letter

How can I add spaces between every character or symbol within a UTF-8 document? E.g. 123hello! becomes 1 2 3 ... a single place is no problem). See Question&Answers more detail:os...

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

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718 views

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bash - syntax of for loop in linux shell scripting

I have a problem implementing a for loop. I get this error when I execute my script test1.sh: 2: Syntax ... to dash shell) shell in ubuntu? See Question&Answers more detail:os...

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

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744 views

1 answer

bash - How do I check if my local docker image is outdated, without pushing from somewhere else?

I'm running a react app in a docker container, on a Coreos server. Let's say it's been pulled from ... the server of an updated image). 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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bash - What does "stty raw -echo" do on OS X

When I try: $ stty raw -echo on my Terminal (Bash on OS X 10.6). It does stringe things and it's ... Is there any resource I could learn 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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629 views

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bash - How to expand shell variables in a text file?

Consider a ASCII text file (lets say it contains code of a non-shell scripting language): Text_File.msh: spool ... compiled by the UNIX shell. See Question&Answers more detail:os...

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

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779 views

1 answer

bash - Use a variable in a sed command

I can't seem to use a variable in a sed command, for example: sed "24s/.*/"$ct_tname"/" file1.sas ... first ct_fname to be passed successfully? See Question&Answers more detail:os...

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

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644 views

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bash - Running R Scripts with Plots

I have a small shell script (bash) which runs a R script which produces a plot as output. Everything works ... Thanks in advance for any help! See Question&Answers more detail:os...

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

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654 views

1 answer

bash - How can I copy several binary files into one file on a Linux system?

I need to copy the content of a folder which contains binary files to one binary file in another directory. ... really works for binary files). See Question&Answers more detail:os...

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

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648 views

1 answer

bash - Download images from website

I want to have a local copy of a gallery on a website. The gallery shows the pictures at domain.com/id/1 ... have a better one please share. See Question&Answers more detail:os...

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

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657 views

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bash - Shell script - Sudo-permissions lost over time

I've made a simple bash script that need to keep it's super-user privileges throughout the script. ... stay throughout the script? 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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