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kandi X-RAY | bash Summary
kandi X-RAY | bash Summary
this is gnu bash, version 5.1. bash is the gnu project’s bourne again shell, a complete implementation of the posix shell spec, but also with interactive command line editing, job control on architectures that support it, csh-like features such as history substitution and brace expansion, and a slew of other features. for more information on the features of bash that are new to this type of shell, see the file ‘doc/bashref.texi’. there is also a large unix-style man page. the man page is the definitive description of the shell’s features. see the file posix for a discussion of how the bash defaults differ from the posix spec and a description of the bash ‘posix mode’. there are some
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of bash
bash Key Features
bash Examples and Code Snippets
def atbash(sequence: str) -> str:
"""
>>> atbash("ABCDEFG")
'ZYXWVUT'
>>> atbash("aW;;123BX")
'zD;;123YC'
"""
letters = string.ascii_letters
letters_reversed = string.ascii_lowercase[::-1] + strin
Community Discussions
Trending Discussions on bash
QUESTION
Got this command: cd /some/dir; /usr/local/bin/git log --diff-filter=A --follow --format=%aI -- /some/dir/file | tail -1
I want to get the output from it.
Tried this:
my $proc2 = run 'cd', $dirname, ';', '/usr/local/bin/git', 'log', '--diff-filter=A', '--follow', '--format=%aI', '--', $output_file, '|', 'tail', '-1', :out, :err;
Nothing output.
Tried this:
my $proc2 = run , $dirname, , $output_file, <| tail -1>, :out, :err;
Git throws an error:
fatal: --follow requires exactly one pathspec
The same git command runs fine when run directly from the command line.
I've confirmed both $dirname
and $output_file
are correct.
git log --help
didn't shed any light on this for me. Command runs fine straight from command line.
UPDATE: So if I take off the | tail -1
bit, I get output from the command in raku (a date). I also discovered if I take the pipe out when running on the command line, the output gets piped into more
. I'm not knowledgeable enough about bash and how it might interact with raku's run
command to know for sure what's going on.
ANSWER
Answered 2022-Mar-07 at 05:26You need to run a separate proc for piping:
QUESTION
I have a dockerfile that currently only installs pip-tools
...ANSWER
Answered 2022-Feb-05 at 16:30It is a bug, you can downgrade using:
pip install "pip<22"
QUESTION
Until yesterday (20 Jan) I could connect to another google drive account (using drive._mount), but when I tried this today, google colab showed me this error:
...ANSWER
Answered 2022-Jan-21 at 14:00Alright, until this problem get solved, I did this trick for my project:
I shared which files I need (like datasets) with my other accounts. For this, you should:
- Go to your google drive (where your file is stored) then right-click on it and choose "Share"
- Click on "Change to anyone with the link"
- Copy link and open it in new window
- In top-right side, click on your google accounts list and select which one you need
- At the opened window, in top-right side click on "Add shortcut to Drive" and choose location where you want to save file in it
- Your file now is accessible in account you did choose
QUESTION
Environment:
...ANSWER
Answered 2022-Jan-25 at 07:13Git For Windows 2.33.1 comes with OpenSSH 8.8 which disables RSA signatures using the SHA-1 hash algorithm by default.
For most users, this change should be invisible and there is no need to replace ssh-rsa keys.
OpenSSH has supported RFC8332 RSA/SHA-256/512 signatures since release 7.2 and existing ssh-rsa keys will automatically use the stronger algorithm where possible.Incompatibility is more likely when connecting to older SSH implementations that have not been upgraded or have not closely tracked improvements in the SSH protocol.
For these cases, it may be necessary to selectively re-enable RSA/SHA1 to allow connection and/or user authentication via the HostkeyAlgorithms and PubkeyAcceptedAlgorithms options.
For example, the following stanza in ~/.ssh/config will enable RSA/SHA1 for host and user authentication for a single destination host:
QUESTION
We have application with huge configuration (this is just a part):
...ANSWER
Answered 2021-Dec-16 at 06:50Option : 1
You can Use the Lens : https://k8slens.dev/kubernetes.html
It's UI for monitoring and Managing K8s clusters. Using this you can also edit the configmap.
Option : 2
You can manage all the Key value into single YAML file and create configmap from file :
QUESTION
I'm not experienced so I can't really pinpoint what is the problem. Thanks for the help.
I cloned this repo: https://github.com/flatlogic/react-native-starter.git
And was trying to follow the steps below:
Clone the repogit clone https://github.com/flatlogic/react-native-starter.git
Navigate to clonned folder and Install dependenciescd react-native-starter && yarn install
Install Podscd ios && pod install
When I got to the pod install I'm getting that error.
...ANSWER
Answered 2021-Jul-28 at 18:31I think your pod install
working fine and has done its job. You need to set up iPhone SDK on your mac then try to run cd ../ && react-native run-ios
.
Follow this guide : React Native Environment set up on Mac OS with Xcode and Android Studio
QUESTION
I an Azure Pipeline on a self-hosted agent I use this task
...ANSWER
Answered 2021-Nov-27 at 06:57This issue is caused by Azure CLI version 2.30.0 which seemed to be rolled out MS hosted agents recently.
Hence I adapted all my Python scripts running on (MS and self) hosted agents to this model:
QUESTION
I hope All you are doing well. Recently I have done the project with react and make a sample here. The problem is in routing. I want to display the child route under its parent but unfortunately I did not make it. I would be truly appreciated it, If anyone can explain the issue or fix the code.
App
...ANSWER
Answered 2021-Nov-16 at 16:35The main issue is that your root path matcher is specified in such a way as to not match the nested paths so the Main
component is unmounted.
App
Here the path for Main
should specify a wildcard matcher to allow continued matching of sub-routes, path="/main/*"
.
QUESTION
I would just like to ask what could be the meaning of this error?
...ANSWER
Answered 2021-Sep-01 at 17:08Error seems to be related to a bug in Git for Windows 2.32. Upgrading to Git for Windows 2.33+ has fixed it for several people.
QUESTION
Could someone please explain why this works, specifically the fact that I am not using ‘$’ character before the names of the variables inside the if statement? I have searched the Bash Reference Manual, but could not find an explanation.
...ANSWER
Answered 2021-Nov-05 at 20:41Dollar signs are optional inside an arithmetic context. This is any context where a value is going to be interpreted as a number.
$(( ... ))
creates an arithmetic context in all POSIX shells(( ... ))
creates an arithmetic context in bash, including infor ((expr1; expr2; expr3))
.let
creates an arithmetic context in shells (like bash) that support that ancient, pre-POSIX, nonstandard syntax.- In
${array[idx]}
orarray[idx]=value
,idx
is evaluated as arithmetic as long as the array has not been declared to be associative. - In
[[ value1 -le value2 ]]
, because-le
is an arithmetic operator (it only does numeric comparisons, not string comparisons), bothvalue1
andvalue2
are parsed as arithmetic. This is also true for-eq
,-ne
,-lt
,-gt
and-ge
. - In
${string:start:len}
, bothstart
andlen
are arithmetic contexts. - When
declare -i variable
has declared a variable to have a numeric type, andvariable=value
is subsequently run,value
is an arithmetic context.
Note that this is not true for arithmetic comparisons inside test
or [
commands; test
(whether or not called under the name [
) acts like a regular shell command rather than special syntax (despite having a built-in implementation as a performance optimization).
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