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  1. [ubuntu] Re: Postfix setup sending emails but cannot send emails with client

    If you want to accept mail from anywhere, you need to use authentication. http://www.postfix.org/SASL_README.html

    If you can restrict the set of hosts permitted to send mail through the server,...
  2. Re: Anyone with experiences of backing up Databases?

    I've used PostgresQL for two decades now and would never choose another DBMS.

    For backups, I run "pg_dump" every night to create a plain-text backup of the database. I suck these over to my...
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    [SOLVED] Re: message on ubuntu 20.10 upgrade

    He was just subject to the locking issue that comes up with apt sometimes.
  4. Re: How I can Run Ubuntu and Wondows Simultaneously?

    If you have only 4 GB and are running VirtualBox on Windows, I've gotten away with 1.5 GB for the Ubuntu guest leaving 2.5 GB for Windows on the host. I recently increased my memory to 16 GB on my...
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    [SOLVED] Re: message on ubuntu 20.10 upgrade

    No, it's fine. Try running "sudo apt update". Did you get an error?
  6. [ubuntu] Re: Postfix setup sending emails but cannot send emails with client

    I don't know. I don't use authenticated SMTP. You'll have to consult the Postfix documentation for that. As you can see from the piece you read, it's pretty extensive.

    You also might want to look...
  7. [ubuntu] Re: Postfix setup sending emails but cannot send emails with client

    By default Postfix is configured only to listen on the localhost interface for security reasons. You need to change the "inet_interfaces" directive in main.cf. Choose

    inet_interfaces = all
    to...
  8. [SOLVED] Re: How do I save a service file in 20.04?

    Sounds like you're using nano. When you're done editing, hit Ctrl+X, then follow the prompts to save the file and exit the editor.

    I'm hardly an expert when it comes to systemd, but it's likely...
  9. [ubuntu] Re: Postfix setup sending emails but cannot send emails with client

    You won't be able to see the server unless you set up port forwarding as TheFu suggests. However, I don't think that's what you want to do.

    Where are the emails you intend to send originating? On...
  10. [ubuntu] Re: Hardware for Virtualization on Ubuntu

    Waiting for answers here is going to take longer than just trying to install it on your machine.

    I'm an empiricist by nature especially when it comes to computing.
  11. Re: Want to install windows 7 on virtual box - need to create ISO file?

    I'm with deadflowr. Just put the DVD in the tray, hit New in the VirtualBox management application, and tell the installer to use the DVD.
  12. [ubuntu] Re: Hardware for Virtualization on Ubuntu

    Rather than asking here, why not just give it a try? Either it will install and work properly, or it will not. You won't damage anything by trying.

    I've run VirtualBox on a wide variety of...
  13. Re: What should be the platform from Web development newbie.

    Like TheFu I do all my coding in an editor (jed, a clone of Emacs). I write in PHP. I prefer to use PostgreSQL over MySQL (or MariaDB) for various reasons. Still the easiest solution on Ubuntu is...
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    Re: Backing up Ubuntu severs

    I have one local server and three virtuals at Linode. Every night my local server runs a cron job that uses rsync to suck over copies of the important files. (I also have Linode's snapshot backup...
  15. [ubuntu] Re: Postfix setup sending emails but cannot send emails with client

    Try using port 25 instead. If you're talking to localhost, there aren't any security issues. I have an SMTP server in my home office. It uses no authentication and plain-text SMTP on port 25. Only...
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    Re: Open raw files in Gimp/Darktable

    It might be a function of using a snap. I'd remove the snap version of GIMP and install the regular version. See if that helps.
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    [SOLVED] Re: iptables rules definition

    You're welcome. I wondered which chain might be most appropriate. Please go to the Thread Tools drop-down at the top of this page and mark the thread [SOLVED].
  18. Re: How to control (jail) proprietery app?

    If you run Windows in a VirtualBox virtual machine, the application will only be able to see the files in the VM and cannot touch ones on the host machine. For a webcam, read this:...
  19. [ubuntu] Re: Upgraded to 20.04, now can't do full screen.

    Reinstalling Firefox won't fix issues in your profile. Close all instances of Firefox, then try this:



    cd ~
    mv .mozilla mozilla.old


    Note the leading period. Now start Firefox and try...
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    [SOLVED] Re: youtube TV does not work

    I have absolutely no problems watching YouTubeTV on Firefox. I'm on 20.04 with Firefox 81.0. I have Widevine and the Cisco H.264 codec enabled.

    Are you using any sort of ad blocker or similar...
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    Re: Can't find network printers

    Does the printer have a static IP address? If it uses DHCP (bad idea), the address might have changed.

    Try installing nmap from the repositories and running a ping scan of the network like this:
    ...
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    Re: issue with ip tables (i think)

    Doesn't the server have an IP address within the VPN space when the VPN is active, and maybe a public IP address when it is not? When you connect over the VPN, are you pointing the ssh client at the...
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    [SOLVED] Re: iptables rules definition

    -A INPUT -s 10.2.1.0/24 -d 10.1.1.1/32 -j ACCEPT
    -A INPUT -s 10.2.1.0/24 -d 10.1.1.2/32 -j ACCEPT
    -A INPUT -s 10.2.1.0/24 -d 10.1.1.3/32 -j ACCEPT

    -A INPUT -d 10.2.1.0/24 -s...
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    [SOLVED] Re: simple scan does not find scanner

    See if VueScan works with it: https://www.hamrick.com/linux-scanner-software.html
  25. [ubuntu] Re: mailchimp setup in Wordpress gives me headache

    First, if you don't tell us what the error is, how can we help?

    But, yes, you'd be better off starting from here: https://www.mc4wp.com/kb/
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