nitrolife

I used lvm with SSD cache few years, but time to time I have problems with loads after reboot. If forgot about reboots all work great with LVM raid + LVM cache. Cache can be configured without raid. And you can add or remove cache in any time. Docs: https://man.archlinux.org/man/lvmcache.7

Russian, English and some Japanese.

Insert logs in pastebin.com and attach links and you can open ticket on git.

You can use postfix + dovecot + roundcube + spamassassin + opendkim + pigeonhole. Maximum stability. Roundcube have aliases plugin.

You can start from here: https://wiki.archlinux.org/title/Virtual_user_mail_system_with_Postfix,_Dovecot_and_Roundcube

Topic starter don’t use docker containers. He use lxc containers. LXC is virtual machines on host kernel. Case is that: He have 3 virtual machines with shared disk. In 3 VMs have 3 different applications. Applications work under different users and can’t rewrite data on shared disk. That is user permissions problem.

the idea is that: all your applications work under the same user. or at least under the same group. because this is exactly how the differentiation of rights is applied.

A good plan is to create some kind of user in all three containers and run qbittorrent, samba and the third application under it.

A bad plan is to run everything under a random user with 777 rights, but this is a really bad plan.

Create a user in all three containers and work under it. That is not hard. Run qbittorent with that user. Config will be there: /home/user/.config . Then set that user for samba. I don’t know third app , but I think you can find how change user in manual.

You can use Revolt. Literaly Discord clone. https://github.com/revoltchat

or you can’t buy if you’re not successful enough or you’re in the wrong country. For example, in my country, the minimum cost of a 1TB SSD is about $85 and a salary of $2,000 is considered a very successful salary at the upper limit

Short command wasn’t work in my env. I can run only with full sockets path. May be I do something wrong.

Thanks. Not full wayland protocol support and have a bugs, but something is greater than nothing. UPD: The utilization of the Internet channel has also increased

Eh, the era when it was possible to throw the interface through an SSH session is over. Sadly. Or maybe I’m just too old. XD

In first you need understand what type of suspend you use:

Suspend to RAM (aka suspend, aka sleep) The S3 sleeping state as defined by ACPI. Works by cutting off power to most parts of the machine aside from the RAM, which is required to restore the machine’s state. Because of the large power savings, it is advisable for laptops to automatically enter this mode when the computer is running on batteries and the lid is closed (or the user is inactive for some time). Suspend to disk (aka hibernate) The S4 sleeping state as defined by ACPI. Saves the machine’s state into swap space and completely powers off the machine. When the machine is powered on, the state is restored. Until then, there is zero power consumption. Hybrid suspend (aka hybrid sleep) A hybrid of suspending and hibernating, sometimes called suspend to both. Saves the machine’s state into swap space, but does not power off the machine. Instead, it invokes the default suspend. Therefore, if the battery is not depleted, the system can resume instantly. If the battery is depleted, the system can be resumed from disk, which is much slower than resuming from RAM, but the machine’s state has not been lost.

I think you use Hybrid suspend. Hybrid suspend store memory to disk (20 seconds lag) and then lost battery for memory renew. Need you Suspend to RAM maybe? 20 Seconds lag will fixed with that.

Then check

cat /sys/power/mem_sleep

If you see

[s2idle] shallow deep

check first if your UEFI advertises some settings for it, generally under Power or Sleep state or similar wording, with options named Windows 10, Windows and Linux or S3/Modern standby support for S0ix, and Legacy, Linux, Linux S3 or S3 enabled for S3 sleep.

If you don’t see anything you can swap sleep mode to Suspend to disk. That slow but don’t use any power. Or try fix sleep status.

More information you can find here: https://wiki.archlinux.org/title/Power_management/Suspend_and_hibernate

You need to create an MX record in the DNS zone of your domain. Something like:

@ IN MX 10 my.zome.
@ IN MX 20 server1.my.zome.

You can create 1 MX record or more. 10 and 20 server priority for input mails.

Then you need to create an spf record. There are several options here. For example

@ IN TXT "v=spf1 +a +mx -all"

allows you to send emails from A domain records, then from MX domain records and prohibits from all other hosts.

Theoretically, you can only create an SPF record with A but without MX and dont create MX DNS records. Although I have not tried this configuration.

This is the minimum set after which you will get into spam, but at least the letters will reach.

You also need to make a PTR record to avoid spam folder, but this is not possible on a dynamic IP.

Raid: https://wiki.archlinux.org/title/RAID

Don’t forget part “email notifications”. In addition to configuring the raid, you need to understand when the disk crashed, otherwise the raid will not help.

If you share files with windows. Basic way SMB share: https://wiki.archlinux.org/title/Samba

if you want share files with linux or windows with not basic ways you have many choises. NFS for example, or sshfs if you need folder time to time, or share directory with nginx ( https://stackoverflow.com/questions/10663248/how-to-configure-nginx-to-enable-kinda-file-browser-mode ), or overkill: nextcloud server.

UPD: In general, you just need to find a linux distributive with good documentation and use this documentation for the first time. Some things are solved differently in Linux than in Windows and you just won’t know about it without reading the wiki.

interesting facts about LVM:

1. You can make a volume snapshot of the system before a major change (for example, an update).

2. You can enable caching and use HDD together with SSD cache

3. You can build raid 0,1,5 directly on LVM (you still need modules from mdraid)

4. Even without a raid, you can expand the partition beyond one disk to another or migrate the partition from disk to disk (without even disabling it)

However, all this is done from the console and I do not know if there is a GUI.

If you need fast online share you can use nginx + WebDAV module . You can use ip filters or auth. Or disable any auth.

You can create graph on the UI and then export to json. To be honest, it’s hard for me to imagine a situation where graphs need to be edited so often. After all, there are excellent template engines in Grafana itself. For quick look anyone can use Explore panel. Maybe I don’t have so much data…

Grafana sends an email screenshot of the graph when an event is triggered on the graph. You can see alerts part on any graph for understand.

You can configure grafana without gui. That explain in https://grafana.com/docs/grafana/latest/administration/provisioning/

prometheus use own time series database. you can connect influxdb to grafana and send alarms from grafana, but alertmanager better i think. node-explorer can collect all this data (sensors, VM/PC load etc.)