Recent questions tagged bash

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bash - AES encrypt with openssl command line tool, and decrypt in Java

I have a bash script that uses the openssl tool to encrypt. #!/bin/bash key128="1234567890123456" iv=" ... uses for a given password? See Question&Answers more detail:os...

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

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bash - Linux serial port listener and interpreter?

I'm using a serial device for a project, and what I'm trying to accomplish PC side, is listening for a ... the cycle all over again? 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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754 views

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bash - linux script that monitors file changes within folders (like autospec does!)

I want to automatically kick off a build whenever a file changes. I've used autospec (RSpec) in Ruby and loved ... can this be done in 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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bash - Change GIT repository to shared

Git allows to create a shared repository amongs a group: git --bare init --shared=group However - how can I change ... want to re-git-init 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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893 views

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bash - Setting path for whenever in cron so it can find ruby

My ruby is in /usr/local/bin. whenever can't find it, and setting PATH at the top of my cron file doesn't ... . so, this is very mysterious... See Question&Answers more detail:os...

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

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715 views

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bash - Getting ID of an instance newly launched with ec2-api-tools

I'm launching an EC2 instance, by invoking ec2-run-instances from simple a bash script, and want to ... most recently launched instance.) See Question&Answers more detail:os...

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

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929 views

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bash - HTTP Google Sheets API v4 how to access without OAuth 2.0?

my idea is to create a google sheet, make it public and then access it from my work computer linux/bash to ... explain this method step by step? See Question&Answers more detail:os...

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

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bash - Shell script to check git for changes and then loop through changed files?

I am trying write a shell script that does the following: Checks the remote git repository for any changes to ... I have the latest changes. See Question&Answers more detail:os...

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

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bash file returns unexpected token `$'do ''

I found this script online and tried to use it: #!/bin/sh # Target directory TARGET=$3 echo "Copying to $TARGET" ... line 6: `do Why is that? See Question&Answers more detail:os...

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

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875 views

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bash - Search+replace strings in filenames

Using bash, how can I search for all occurrences of the substring 'foo' in all filenames (including folders) contained ... - ybar.h - 1bar.c See Question&Answers more detail:os...

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

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871 views

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bash - Indenting heredocs with spaces

For personal development and projects I work on, we use four spaces instead of tabs. However, I need to ... Unix/Linux Stack Exchange instead. See Question&Answers more detail:os...

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

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bash - Dockerfile CMD instruction will exit the container just after running it

I want to setup some configuration when my container starts, for this I am using shell scripts. But my ... entrypoint=/bin/bash <imagename> See Question&Answers more detail:os...

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

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793 views

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bash - How do I open a file with Chrome from the command line?

I would like to open a file (index.html) in the current directory with Google Chrome or Chromium from a ... google-chromium: command not found See Question&Answers more detail:os...

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

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868 views

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bash - Run a script in the same directory as the current script

I have two Bash scripts in the same folder (saved somewhere by the user who downloads the entire ... Bash-supported operating system? See Question&Answers more detail:os...

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

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825 views

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bash - Inter-process communication without FIFOs

Inside a BASH script we can have multiple processes running in background which intercommunicate using named ... file-descriptor redirection. 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 - Command substitution vs process substitution

I am trying to understand the differences between these two similar commands. aa=$(foo | bar | head -1) ... command with the best performance. See Question&Answers more detail:os...

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

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987 views

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bash - Merging CSV files : Appending instead of merging

So basically i want to merge a couple of CSV files. Im using the following script to do that : paste -d , ... do to force merge below records? See Question&Answers more detail:os...

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

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877 views

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bash script use cut command at variable and store result at another variable

I have a config.txt file with IP addresses as content like this 10.10.10.1:80 10.10.10.13:8080 10.10.10. ... but I couldn't find it out myself. 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 - Convert multiline string to array

I have this script: nmapout=`sudo nmap -sP 10.0.0.0/24` names=`echo "$nmapout" | grep "MAC" | grep ... that the second string has spaces in 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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869 views

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bash - What does "< <(command args)" mean in the shell?

When looping recursively through folders with files containing spaces the shell script I use is of this form, copied from ... "< <", you see. 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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bash - Case statement fallthrough?

In popular imperative languages, switch statements generally "fall through" to the next level once a case statement has been ... : line 6: ;&' See Question&Answers more detail:os...

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

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843 views

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bash - How to recursively add subdirectories to the PATH?

How do you do it? My directory code/, at work, is organized in folders and subfolders and subsubfolders, all of ... to run on a regular basis. 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 - Reading $OPTARG for optional flags?

I'd like to be able to accept both mandatory and optional flags in my script. Here's what I have so ... everyone. This works perfectly so far. See Question&Answers more detail:os...

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

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897 views

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bash - how to write finding output to same file using awk command

awk '/^nameserver/ && !modif { printf("nameserver 127.0.0.1 "); modif=1 } {print}' testfile.txt It is ... same file. In my example testfile.txt. See Question&Answers more detail:os...

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

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948 views

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bash - Docker number of lines in terminal changing inside docker

I would like to know how to change the following behavior. Let's say my terminal has 28 lines. Then I use the ... be and how can this be solved? See Question&Answers more detail:os...

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

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737 views

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bash - Get list of variables whose name matches a certain pattern

In bash echo ${!X*} will print all the names of the variables whose name starts with 'X'. Is it possible to ... contains an 'X' in any position? 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

1 answer

bash - Remove the last element from an array

I want to remove the last entry in my array, and I want the array to show me that it has 1 less entry when ... me and show me the right way. 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

1 answer

bash - How do I get just real time value from 'time' command?

I would like to make a script that outputs only the real time value from the time command so I can plot the ... from 'time' command in seconds? See Question&Answers more detail:os...

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

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