linux tag

403 questions

2 answers
336 views
0

about the possibility of being attacked

Thank you for your help.I would like to inquire about the possibility of server intrusion and attack from outside.If you run the following command and leave SSL certificate turned off, Could you tell ...

linux git ubuntu security ssl

2 years ago

2 answers
398 views
0

When specifying a group with the chown command, is the format using . (dot) as the delimiter a specification?

If you subtract chown man on Ubuntu, the format is written in two lines as follows: SYNOPSIS chown[OPTION]...[OWNER][:[GROUP]] FILE... chown [OPTION]...--reference=RFILE FILE...Some of the chown man p...

linux ubuntu

2 years ago

3 answers
282 views
0

How do I get permission owner information for all directories in bulk on Linux?

I was ordered to do the subject matter at work.For the time being, I didn't know how to do it, so I went to / and ran ls-lR.To be honest, file permissions are not very important, but if we were to get...

linux

2 years ago

1 answers
376 views
0

When I tried to do apt-get update on Ubuntu 20.04.2 I got an error and I couldn't solve it.

As the title suggests, when I entered the following command at the terminal, an error occurred.$sudo apt-get updateHit:1 http://jp.archive.ubuntu.com/ubuntu focal InReleaseHit:2 http://jp.archive.ubun...

linux ubuntu apt

2 years ago

1 answers
298 views
0

SMTP, why is it that only certain emails are "sent but not delivered to the other party"?

Mediawiki is running in CentOS.Browse to Mediawiki (http://wiki.example.com), This system allows regular users to write to wiki once they register their email address.System: [email protected] 1: u...

linux centos mail

2 years ago

1 answers
415 views
0

I want to separate each new line with awk and extract a record with a specific string in grep.

How do I extract a record from address.txt that is separated by line breaks to four records and contains the string Pass?If you enter the following command, you will see all output.cat address.txt |aw...

linux shell awk grep

2 years ago

1 answers
382 views
0

Curl command installed for Homebrew is not recognized

Failed to install brew on xserver.When I checked the brew doctor to see if it was working properly, the following error occurred:Error: Please update your system curl.Minimum required version: 7.41.0Y...

linux homebrew curl

2 years ago

1 answers
409 views
0

To make apt-get workable on macOS

Can I use sudo apt-get update if I install linux on macos?When I looked into it, many people said they didn't support macos, so I asked because I was curious.Even if I run it on a brew or macports, it...

linux macos apt

2 years ago

1 answers
303 views
0

Install Ubuntu as a Virtual Guest in VirtualBox and Connect to ssh from a Windows 10 Host

Installed Ubuntu 20.04.2 LTS as Virtual Guest in VirtualBox 6.1.16Guest has no ssh connection from Windows 10 Home 20H2.Question detailsYou are trying to define a Unit configuration file for ssh in sy...

linux ubuntu ssh virtualbox

2 years ago

1 answers
343 views
0

How do I create a distributed shared memory environment?

I usually write backend code.I thought that having skills in the infrastructure field would expand my scope, so I set my goal with the theme of reuse garbage PCs to create high-performance machines.I ...

linux windows macos

2 years ago

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