Recent questions tagged bash

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bash - How to edit files in stopped/not starting docker container

Trying to fix errors and debug problems with my application that is split over several containers, I frequently ... relevant but is outdated. See Question&Answers more detail:os...

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

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646 views

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bash - How to give a pattern for new line in grep?

How to give a pattern for new line in grep? New line at beginning, new line at end. Not the regular expression way. Something like . See Question&Answers more detail:os...

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

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915 views

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bash - Linux shell script to add leading zeros to file names

I have a folder with about 1,700 files. They are all named like 1.txt or 1497.txt, etc. I would like ... the number of initial zeros changed). 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 - Convert Unix timestamp to a date string

Is there a quick, one-liner way to convert a Unix timestamp to a date from the Unix command line? date might ... way?-?am I missing 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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bash - Difference between wait and sleep

What is difference between wait and sleep? See Question&Answers more detail:os...

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

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822 views

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bash - choosing between $0 and BASH_SOURCE

How does one choose between "$0" and "${BASH_SOURCE[0]}" This description from GNU didn't help me much. ... called from ${BASH_SOURCE[$i+1]} 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 - VSCode Change Default Terminal

I am using Visual Studio Code on my Windows 10 PC. I want to change my default terminal from Windows PowerShell to ... ). 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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955 views

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bash - Grep characters before and after match?

Using this: grep -A1 -B1 "test_pattern" file will produce one line before and after the matched pattern in the ... on 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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1.0k views

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bash - How to check if a symlink exists

I'm trying to check if a symlink exists in bash. Here's what I've tried. mda=/usr/mda if [ ! -L $mda ] ... '!' is there, it triggers every time. 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 - List files with certain extensions with ls and grep

I just want to get the files from the current dir and only output .mp4 .mp3 .exe files nothing else. So ... Running this script on Slow Leopard. See Question&Answers more detail:os...

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

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574 views

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bash - Delete multiple remote branches in git

I have a team member who inadvertently pushed over 150 of his local branches to our central repo. Thankfully, they ... all of those at once? See Question&Answers more detail:os...

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

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625 views

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bash - Rename all files in directory from $filename_h to $filename_half?

Dead simple. How do I rename 05_h.png 06_h.png to 05_half.png 06_half.png At least, I think it's simple, ... you already know. 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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783 views

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bash - How to go to each directory and execute a command?

How do I write a bash script that goes through each directory inside a parent_directory and executes a command ... of directories is unknown. See Question&Answers more detail:os...

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

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661 views

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bash - Efficiently test if a port is open on Linux?

From a bash script how can I quickly find out whether a port 445 is open/listening on a server. I have ... enumerate first and greps after 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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629 views

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bash - How to get the start time of a long-running Linux process?

Is it possible to get the start time of an old running process? It seems that ps will report the date ... lost forever for old processes? See Question&Answers more detail:os...

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

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838 views

1 answer

bash - How to use > in an xargs command?

I want to find a bash command that will let me grep every file in a directory and write the output of that ... aren't as applicable for me. See Question&Answers more detail:os...

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

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630 views

1 answer

bash - How can I check if a package is installed and install it if not?

I'm working on a Ubuntu system and currently this is what I'm doing: if ! which command > /dev/null; ... Or is there a more elegant solution? See Question&Answers more detail:os...

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

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673 views

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bash - How can I convert tabs to spaces in every file of a directory?

How can I convert tabs to spaces in every file of a directory (possibly recursively)? Also, is there a way of ... the number of spaces per tab? See Question&Answers more detail:os...

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

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873 views

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bash - Why does ls give different output when piped

Printing to terminal directly: $ ls a.out avg.c avg.h Piping to cat $ ls | cat a.out avg.c avg ... give a different output based on destination? See Question&Answers more detail:os...

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

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640 views

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bash - Using Awk or Sed to tack on a statement at the end of a specific line

I have a file I named poscar1.cif, and I would like to insert the contents of a variable at a specific ... too large to post, unfortunately). 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

1 answer

bash - Launch a python script from another script, with parameters in subprocess argument

To launch a python script (it is needed for running an OLED display) from terminal, I have to use the ... parameters to launch this 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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1.0k views

1 answer

bash - Get java version number from python

I need to get the java version number, for example "1.5", from python (or bash). I would use: os.system(' ... sed. It should be in one line. 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

1 answer

bash - $$ in a script vs $$ in a subshell

$$ gives process id of the script process when used in a script, like this: Example 1 #!/bin/bash # processid ... the script runs in example 1? 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

1 answer

bash - Exclude a string from wildcard search in a shell

I am trying to exclude a certain string from a file search. Suppose I have a list of files: file_Michael.txt, ... do it with a string? Sebastian See Question&Answers more detail:os...

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

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787 views

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bash - Python equivalent to perl -pe?

I need to pick some numbers out of some text files. I can pick out the lines I need with grep, but didn ... just more convenient in this case? 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 - Run shell script (with parameters) on Windows command line via Plink

I need to execute a shell script remotely inside the Linux box from Windows #!/bin/bash if [ "$#" -ne ... which will execute on remote 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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836 views

1 answer

bash - Parse JSON to array in a shell script

I'm trying to parse a JSON object within a shell script into an array. e.g.: [Amanda, 25, http:// ... right side and not the entire line. See Question&Answers more detail:os...

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

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738 views

1 answer

bash - xargs: command substitution $(...) with pipe doesn't work

I'm trying to write short script, and the following command: echo "aaa111 bbb111" | xargs -I {} echo {} | ... too. Still can't understand, why. See Question&Answers more detail:os...

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

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