Recent questions tagged Bash

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I want to send an email with attached pdf file through the Sparkpost API with curl post. To insert the pdf I use (my test ... wrap=0)'" } ] } }' See Question&Answers more detail:os...

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

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bash - /usr/bin/find: cannot build its arguments dynamically

The following command works as expected interactively, in a terminal. $ find . -name '*.foo' -o -name '*.bar ... to find later in a script. See Question&Answers more detail:os...

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

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bash - while loop to read file ends prematurely

The eventual goal is to have my bash script execute a command on multiple servers. I almost have it set up. My SSH ... -a"] in the while loop? See Question&Answers more detail:os...

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

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bash - How to unbuffer stdout of legacy running binary without stdbuf and similar tools

I want to monitor the realtime output of a program that I will start. I am trying to do this by redirecting the ... run. It is a legacy binary. See Question&Answers more detail:os...

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

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bash - How to pass variables from a shell script to an expect script?

I've shell script as below: #!/bin/bash echo "Select the Gateway Server:" echo " 1. Gateway 1" echo ... do everything in expect script itself) See Question&Answers more detail:os...

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

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889 views

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bash - Set shell environment variable via python script

I have some instrument which requires environment variable which I want to set automatically from python code. So I ... exporting it to shell? See Question&Answers more detail:os...

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

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916 views

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bash - How to check if a number is within a range in shell

I want to just insert number between two values, and otherwise the script repeated until correct number. This is ... "your number is" $number See Question&Answers more detail:os...

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

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710 views

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bash - What is more portable? echo -e or using printf?

I'm currently writing a bash testing framework, which requires to be as portable as possible. So, at one ... I could find some references? See Question&Answers more detail:os...

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

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bash - How do I apply a shell command to many files in nested (and poorly escaped) subdirectories?

I'm trying to do something like the following: for file in `find . *.foo` do somecommand $file done But the ... out. Thanks, Alex (Hi Matt!) See Question&Answers more detail:os...

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

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bash - awk calculate average or zero

I am calculating the average for a bunch of numbers in a bunch of text files like this: grep '^num' ... of this slightly modified one-liner? See Question&Answers more detail:os...

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

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757 views

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bash XHTML parsing using xpath

I'm writing a small script to learn how to parse an XHTML web page. The following command: cat q?s=goog.xhtml ... ://finance.yahoo.com/q?s=goog See Question&Answers more detail:os...

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

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858 views

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bash - Get exit code from subshell through the pipes

How can I get exit code of wget from the subshell process? So, main problem is that $? is equal 0. Where can $? ... , my bash version is 4.2.20. See Question&Answers more detail:os...

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

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672 views

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bash - Use array variable in awk?

A=(aaa bbb ccc) cat abc.txt | awk '{ print $1, ${A[$1]} }' I want to index an array element ... not correct in awk syntax. Could someone help? See Question&Answers more detail:os...

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

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730 views

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bash - Why does process substitution not work in a shell script?

I am trying to comm command in shell script but getting an error: a.sh: command substitution: line 1: syntax error ... ) | wc -l` echo $temp See Question&Answers more detail:os...

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

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600 views

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bash - shell script respond to keypress

I have a shell script that essentially says something like while true; do read -r input if ["$input" = ... functionality within a shell script? See Question&Answers more detail:os...

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

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739 views

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bash - How to capture a git commit message and run an action

I'm new to git and I want to be able to capture the commit message after a push to the origin/master and run ... right hook to do this or not. See Question&Answers more detail:os...

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

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620 views

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bash script write executing time in a file

I need to write the time taken to execute this command in a txt file: time ./program.exe How can I do in ... file and does go to the screen). See Question&Answers more detail:os...

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

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608 views

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bash - How do I run a java program from a different directory?

I have a java program that I would like to be able to run from anywhere on my machine. I would ... " CommandProgram produces the same results. See Question&Answers more detail:os...

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

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824 views

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bash - How can I sort file names by version numbers?

In the directory "data" are these files: command-1.9a-setup command-2.0a-setup command-2.0c-setup command-2. ... the output in the wanted order? 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

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bash - VSCode Integrated Terminal Doesn't Load .bashrc or .bash_profile

I have the following files to handle shell configuration: #~/.bash_profile if [ -f ~/.bashrc ]; then source ... .osx setting without any luck. See Question&Answers more detail:os...

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

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736 views

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bash - Difference between single and double quotes in awk

I have this awk statement: glb_library="my_library" awk " /^Direct Dependers of/ { next } /^---/ { next } ... the null string instead of ''. See Question&Answers more detail:os...

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

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685 views

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bash - Git Status Across Multiple Repositories on a Mac

I have been searching for a solution to this for a while and have not found quite what I need. I have ... might have been written for *nix. See Question&Answers more detail:os...

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

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998 views

1 answer

bash - Is there any mutex/semaphore mechanism in shell scripts?

I'm looking for mutex/semaphore/concurrency mechanism in shell script. Consider following situation: Unless "a" user ... ] in shell scripting? 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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bash - Run all Python files in a directory

What is the best way to run all Python files in a directory? python *.py only executes one file. Writing one line ... I'm using the bash shell. See Question&Answers more detail:os...

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

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588 views

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bash - Renaming a set of files to 001, 002, ... on Linux

I originally had a set of images of the form image_001.jpg, image_002.jpg, ... I went through them and ... into a bash loop or something? See Question&Answers more detail:os...

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

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1.1k views

1 answer

bash - Exporting JSON to environment variables

If I have a JSON like this, { "hello1": "world1", "testk": "testv" } And I want to export each of these ... } } echo $(_jq '.samplekey') 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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704 views

1 answer

bash - Finding gaps in sequential numbers

I don't do this stuff for a living so forgive me if it's a simple question (or more complicated than I think ... work with that to get the gaps. See Question&Answers more detail:os...

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

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1.1k views

1 answer

bash - How do I properly escape data for a Makefile?

I'm dynamically generating config.mk with a bash script which will be used by a Makefile. The file is ... it as a regular character) See Question&Answers more detail:os...

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

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