Category: Linux 101 stuff. Questions are encouraged

Raspberry Pi 3 / Ubuntu / network help

Raspberry Pi 3 / Ubuntu / network help:

Can someone please help me with this real quick please. I’ve been googling it for about 6 hours across 3 days now.

I’m connecting from my laptop directly to my raspberry pi 3 with an ethernet cable. I’m using putty to connect to it.

I have an eth0 on my raspberry pi. Its ip address is 192.168.1.254. When I change my laptop’s ip address to 192.168.1.123, I can ping the raspberry pi 3 just fine. Everything’s ok so far.

Next, if I go into /etc/network/interfaces and change eth0 to 172.25.127.251, and I go and change my laptop’s ip address to 172.25.127.123, I can also ping to raspberry pi 3 just fine. Again, everything’s ok so far.

The problem comes when I keep eth0 to 192.168.1.254, and I create eth0.127 and set it to 172.25.127.251. So now I have eth0 and eth0.127 on different networks, both on the raspberry pi 3. If I set my laptop’s ip address to 192.168.1.123, then I can connect to eth0. HOWEVER, if I set my laptop’s ip address to 172.25.127.123, then I can NOT connect to eth0.127.

Can someone please tell me why? Much appreciated.

submitted by /u/jayjs2000
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Quicken alternative

Quicken alternative:

Hello all,

Installing linux for the 100th time it seems. Tried to make the switch before, but couldnt for some many excuses i cant count (some work related). A lot has changed, and this time i intend to make it work. Committing to it for at least a year on the home pc.

Enough jabber i guess. So i’m looking for a quicken like alternative, and it seems there are a number of them. So I figured, rather than install them all i would ask here for some other user’s experiences. One of the big features I’m looking for is the ability to down the transactions directly from the bank. Any suggestions?

submitted by /u/fortressbeast
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Can’t delete files on a NAS via PLEX

Can’t delete files on a NAS via PLEX:

I recently migrated my Plex Media Server from a windows 10 machine to an ubuntu machine and since then I have not been able to delete files via plex clients.

First and foremost, yes, I have enabled that choice in PLEX settings. This is some kind of a permissions issue I assume. Here is what I am working with:

All my media is stored on a NAS. I have mounted the shares in ubuntu by editing my etc/fstab. I am guessing that the PLEX service on my Ubuntu machine doesn’t have adequate permission to delete files from my NAS. What I don’t know is how to prove that and/or solve the issue.

Oddly, when PLEX was on my Windows 10 machine and PLEX connected to the same samba shares there was no issue. Is this somehow related to the fact that Ubuntu connects to these shares via cifs?

I have tried playing around a little bit in OMV with users, groups and privileges but honestly I am out of my debt and worried I am really going to screw something up. So how do I tell my NAS “Chill, PLEX is with me.”?

submitted by /u/cadelle
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Newbies! You have to listen to Jupiter Broadca…

Newbies! You have to listen to Jupiter Broadcasting and use Linux Academy!:

https://linuxacademy.com/blog/linuxacademy-com/jupiter-broadcasting-joins-linux-academy/

So cool these two forces are finally uniting! *~<]:D

So my Linux-learning-journey blossomed listening to Jupiter Broadcasting –> which led me to Linux Academy –> which led me to success! Do yourself a favor an get the $299 special for LA before the price goes back up next week.

submitted by /u/SheldonSeaShells
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Using Lenovo DisplayLink driver on linux Mint …

Using Lenovo DisplayLink driver on linux Mint 19:

has anyone got thjs working. I can only find the link to use it on Ubuntu.

submitted by /u/jonhii207
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Postfix null client failing delivery

Postfix null client failing delivery:

I am running a null client on my web server as I use Google for email. The web server is required to output emails for password resets etc. It works for other major providers, however it is unable to send an email to hotmail users or to the domains own address.

Null client set up:

myhostname = srv.domain.tld (domain has been removed)

myorigin = $mydomain

relayhost = $mydomain

inet_interfaces = loopback-only

mydestination =

Output from logs when attempting to mail Hotmail:

Sep 21 21:07:03 SRV01 postfix/smtp[6051]: 2431260112FD: to=[REDACTED@hotmail](mailto:REDACTED@hotmail), relay=alt2.aspmx.l.google.com[74.125.68.26]:25, delay=3.3, delays=0/0/2.8/0.44, dsn=5.1.1, status=bounced (host alt2.aspmx.l.google.com[74.125.68.26] said: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient’s email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser b4-v6si2447667pla.46 – gsmtp (in reply to RCPT TO command))

The email is definitely correct.

Output from logs when attempting to mail own domain emails:

postfix/error[8466]: 801DC60112FD: to=<[REDACTED@domain.tld](mailto:REDACTED@domain.tld), relay=none, delay=0.03, delays=0.02/0.01/0/0.01, dsn=5.1.1, status=bounced (User unknown in virtual alias table)

Sep 21 21:33:19 SRV01 postfix/smtp[8467]: Untrusted TLS connection established to aspmx.l.google.com[173.194.76.27]:25: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)

Sep 21 21:33:20 SRV01 postfix/smtp[8467]: 801DC60112FD: host aspmx.l.google.com[173.194.76.27] said: 451-4.3.0 Multiple destination domains per transaction is unsupported. Please 451 4.3.0 try again. r18-v6si2216495wmc.18 – gsmtp (in reply to RCPT TO command)

Any help would be greatly appreciated!

submitted by /u/connorhancock
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How to resolve error: unknown filesystem from …

How to resolve error: unknown filesystem from grub rescue:

Dual-booting Windows 10 and Bunsenlabs Hydrogen, when I decided to change distros. I deleted the hydrogen partition, and now cannot boot into anything from grub rescue prompt.

ls returns (hd0) (hd0,msdos5) (hd0,msdos4) (hd0,msdos2) (hd0,msdos1) 

Ls does not return anything on any of those partitions.

submitted by /u/Spartacuz9er9er
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SFTP Permissions

SFTP Permissions:

Hi,

I have set up a user for SFTP, with the group SFTPUSERS, which is rooted at a directory X.

Match Group sftpusers

ChrootDirectory /var/www/html/directoryX

X11Forwarding no

AllowTcpForwarding no

ForceCommand internal-sftp

PasswordAuthentication yes

When I set chown root:sftpuser /var/www/html/directoryX, the user can login to the server but is unable to edit anything.

What config is required to enable sftpuser to write to the server?

(chmod 755 also completed on the directory)

submitted by /u/connorhancock
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General maintenance/set up questions [Ubuntu 1…

General maintenance/set up questions [Ubuntu 18.04]:

Hi, I just got done (re)installing Ubuntu 18.04 in the hopes it’d fix a little slowdown I’d encountered – too early to tell if it made a difference, but I have some questions:

  • When trying to boot from the live USB, the first time failed. I created the USB using Rufus, made sure to triple check the ISO hashsum and all that, so I’m fairly certain I got a legitimate image.
    What beats me is, the second timeit worked perfectly. I’m now convinced I’ve done something wrong and my install is doomed. I’m being overcautious but is there a way I can make sure everything’s as it should be in my OS?

  • In general is there somewhere I can read up on maintaining your system and generally not screwing it up? Is that even a thing I need to do?

  • Is there any common advice that is actually a bad idea?

  • When reinstalling, I let the installer just obliterate and overwrite the old installation. I thought it would copy the partitioning scheme. It didn’t. Now I don’t appear to have separate root and home partitions. Is that a bad thing? I believe it makes it less easy to upgrade everything and keep your files, but that’s not a huge worry for me. Otherwise?

  • Is there anything I’m (probably) forgetting that I should be mindful of going forward?

On a semi-related note, if you happen to be using VScode, what method did you use to install it? (There’s a couple ways and none seem to be the ‘best’ necessarily. Just curious what people went with).

Thanks.

submitted by /u/whatevernuke
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Ubuntu-based elementary OS 5.0 “Juno” Beta 2 L…

Ubuntu-based elementary OS 5.0 “Juno” Beta 2 Linux distro now available:

submitted by /u/CornCobBobby
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