Exactly how much physical memory is installed?
I've often wanted to calculate the exact amount of physical memory installed in a system running Linux, and I finally stumbled across a satisfying solution today: look under /sys/devices/system/memory.
I've often wanted to calculate the exact amount of physical memory installed in a system running Linux, and I finally stumbled across a satisfying solution today: look under /sys/devices/system/memory.
Running Nextcloud 20 and OnlyOffice 6 is a workable alternative to using Google Docs for collaboration in small, private teams.
You're installing a new Linux kernel or drivers or some other package that needs to update your initramfs, and you see a message like this:
update-initramfs: Generating /boot/initrd.img-5.4.0-53-generic W: Possible missing firmware /lib/firmware/rtl_nic/rtl8125a-3.fw for module r8169 W: Possible missing firmware /lib/firmware/rtl_nic/rtl8168fp-3.fw for module r8169
What does this mean?
We had unexpectedly heavy snowfall the other day and, as always, the mains power supply came back only after a few days of repairing broken power lines in the forest. Meanwhile, the days were so overcast that the solar inverter couldn't charge the batteries enough to keep up with our minimal domestic load.
Which meant that when the sun came out again, I was left staring at something like this for a long time:
root@soot:~# ps -eo pid,cmd|grep '[f]sck' 756 /lib/systemd/systemd-fsck /dev/mapper/sdb1_crypt 757 /sbin/fsck -a -T -l -M -C4 /dev/mapper/sdb1_crypt 758 /lib/systemd/systemd-fsckd 759 fsck.ext4 -a -C4 /dev/mapper/sdb1_crypt
Long enough, in fact, that I began to wonder if I could tell what it was doing. (The volume in question is exported via iSCSI from a Synology NAS and fsck is still running long after the machine has otherwise finished booting up, so I have ordinary shell access.)
volumeicon is a small mixer with sensible default behaviour.
A simple backport from Debian unstable fixed a package conflict that left me without manpages.
Here's how I configured Postfix to relay mail from x@example.com through smtp-relay.gmail.com:587 using the credentials set up for x@example.com on Google Apps.
Wherein I try to make a Raspberry Pi rewrite its own SD card image, without success.
The new Wireguard VPN looks very promising.
Hassath's birthday present this year was an Intel NUC5PPYH (with 8GB of DDR3 RAM and a 250GB SSD) to stand in at home for her ageing Thinkpad X131E. It works fine with Debian 8.