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51e489a8e3
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23
data/sharing_secrest.md
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23
data/sharing_secrest.md
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---
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title: "Sharing Secrets"
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tags: [ "data", "death", "secrets", "ssss" ]
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---
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You can share parts of a secret with multiple people, so only some of them need to agree to see the secret.
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Install `ssss`, then decide on the total number of secrets (`N`), and the threshold of people who must share their shard of the secret in order to reveal the secret.
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```bash
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N=5
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T=3
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FILE=secret.txt
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fortune | ssss-split -t $T -n $N > $FILE
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```
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Each shard is a line inside secret.txt.
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Check it's working:
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```bash
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head -n $T $FILE | ssss-combine -t $T
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tail -n $T $FILE | ssss-combine -t $T
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```
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@ -1,57 +0,0 @@
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#!/bin/bash
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# https://www.unixmen.com/install-arch-linux-raspberry-pi/
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pacman-key --init || echo init fail >> log
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pacman-key --populate archlinuxarm || echo update fail >> log
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pacman -Syyuu || echo update fail >> log
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sed -i s/#en_GB.UTF-8 UTF-8/en_GB.UTF-8 UTF-8/ /etc/locale.gen
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echo 'LANG=en_GB.UTF-8' >> /etc/locale.conf
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locale-gen
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pacman -S base-devel htop ranger tmux lolcat fortune-mod git figlet rxvt-unicode task timew calcurse fail2ban
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# texlive-most
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if [[ $2 == all || $1 == all ]]; then
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pacman -S nnn feh dmenu rofi xf86-video-fbdev xorg xorg-xinit xorg-server xorg-server-utils xterm
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fi
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# Audio
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echo 'dtparam=audio=on' >> /boot/config.txt
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if [[ $1 == audio ]]; then
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pacman -S alsa-utils alsa-firmware alsa-lib alsa-plugins
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fi
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echo 'device_tree_param=spi=on' >> /boot/config.txt
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# for a vnc viewer
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if [[ $1 == vnc ]]; then
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tigervnc gcc geany i3 i3status compton feh sxiv rxvt-unicode
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fi
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# Swap
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cd /var/cache/swap
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dd if=/dev/zero of=swapfile bs=1K count=2M
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chmod 600 swapfile
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mkswap swapfile
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swapon swapfile
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echo "/var/cache/swap/swapfile none swap sw 0 0" > /etc/fstab
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# fail2ban
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[ -e sshd.local ] && \
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pacman -S fail2ban && \
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mv sshd.local /etc/fail2ban/jail.d && \
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systemctl start fail2ban
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# If it won't reboot, install `arch-install-scripts` then try again and firstly:
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# genfstab / > /etc/fstab
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#!/bin/sh
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pacman -S gitea postgresql
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sudo su postgres -c 'initdb -D /var/lib/postgres/data'
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sudo systemctl start postgresql
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sudo su postgres -c 'createuser -P gitea'
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sudo su postgres -c 'createdb -O gitea gitea'
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sudo sed -i 's/mysql/postgres/' /etc/gitea/app.ini
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sudo sed -i 's/root/gitea/' /etc/gitea/app.ini
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sudo systemctl start gitea
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#!/bin/bash
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set -e
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yay -S pi-hole-ftl pi-hole-server
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# Configuration in /etc/pihole/pihole-FTL.db
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# You can change DBINTERVAL to 60 or more to limit writes to disk
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sudo systemctl disable --now systemd-resolved
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sudo systemctl enable --now pihole-FTL
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pihole -g
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pihole -c
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if [ "$1" == "unbound" ]; then
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sudo pacman -S unbound
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sudo cp /etc/unbound/unbound.conf /etc/unbound/unbound.conf.old
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echo "server:
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# If no logfile is specified, syslog is used
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# logfile: "/var/log/unbound/unbound.log"
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verbosity: 0
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interface: 127.0.0.1
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port: 5335
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do-ip4: yes
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do-udp: yes
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do-tcp: yes
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# May be set to yes if you have IPv6 connectivity
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do-ip6: no
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# You want to leave this to no unless you have *native* IPv6. With 6to4 and
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# Terredo tunnels your web browser should favor IPv4 for the same reasons
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prefer-ip6: no
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# Use this only when you downloaded the list of primary root servers!
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# If you use the default dns-root-data package, unbound will find it automatically
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#root-hints: "/var/lib/unbound/root.hints"
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# Trust glue only if it is within the server's authority
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harden-glue: yes
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# Require DNSSEC data for trust-anchored zones, if such data is absent, the zone becomes BOGUS
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harden-dnssec-stripped: yes
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# Don't use Capitalization randomization as it known to cause DNSSEC issues sometimes
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# see https://discourse.pi-hole.net/t/unbound-stubby-or-dnscrypt-proxy/9378 for further details
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use-caps-for-id: no
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# Reduce EDNS reassembly buffer size.
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# Suggested by the unbound man page to reduce fragmentation reassembly problems
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edns-buffer-size: 1472
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# Perform prefetching of close to expired message cache entries
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# This only applies to domains that have been frequently queried
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prefetch: yes
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# One thread should be sufficient, can be increased on beefy machines. In reality for most users running on small networks or on a single machine, it should be unnecessary to seek performance enhancement by increasing num-threads above 1.
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num-threads: 1
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# Ensure kernel buffer is large enough to not lose messages in traffic spikes
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so-rcvbuf: 1m
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# Ensure privacy of local IP ranges
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private-address: 192.168.0.0/16
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private-address: 169.254.0.0/16
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private-address: 172.16.0.0/12
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private-address: 10.0.0.0/8
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private-address: fd00::/8
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private-address: fe80::/10
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" | sudo tee /etc/unbound.conf
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echo "Make this the only pihole DNS: PIHOLE_DNS_1=127.0.0.1 in /etc/pihole/setupVars.conf"
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fi
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@ -1,8 +0,0 @@
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#!/bin/bash
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flatpak --user remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
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flatpak --user install flathub com.valvesoftware.Steam
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flatpak run com.valvesoftware.Steam
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@ -1,10 +0,0 @@
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git clone https://aur.archlinux.org/yay.git
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cd yay
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makepkg -si
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yay -S perl-graph-easy signal-desktop sc-im ncpamixer xdg-utils-mimeo torrench
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yay -S ttf-tengwar-annatar
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24
system/monitoring.md
Normal file
24
system/monitoring.md
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---
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title: "Monitoring"
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tags: [ "Documentation", "System", "CPU", "Memory" ]
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---
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Print the average CPU load over 1 minute, 5 minutes, and 15 minutes:
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```bash
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watch -d cat /proc/loadavg
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stress="$(cat /proc/loadavg | awk '{print "Usage:" $2"%"}')"
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```
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Show memory usage in Gibitytes.
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```bash
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free -g
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```
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Show low and high gigibtye usage on a *l*ine, and repeat the measurement every 5 seconds:
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```bash
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REP=5
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free --lohi -g -s $REP | lolcat
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```
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