#Spring2026 Little Fly
Category: Computers
alias _pwgen='< /dev/urandom tr -dc A-Za-z0-9,.#%$ | head -c 8 ; echo -n \ ; < /dev/urandom tr -dc A-Za-z0-9,.#%$ | head -c 9 ; echo'
alias _pwgen='< /dev/random tr -dc A-Za-z0-9,.#%$ | head -c $(($RANDOM % 8+3)) ; echo -n \ ; < /dev/random tr -dc A-Za-z0-9,.#%$ | head -c $(($RANDOM % 8+3)) && echo'
alias _pwgen2='let i=1 && while [ $i -le 4 ] ; do \
echo -n $(xkcdpass --numwords 2 --case capitalize | xargs) && echo -n \ && \
< /dev/random tr -dc 0-9,.#%$ | head -c $(($RANDOM % 2+3)) && echo && let i++ ; done'
arduino-cli config add board_manager.additional_urls \
https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
arduino-cli core update-index
arduino-cli core install rp2040:rp2040
arduino-cli compile -b rp2040:rp2040:waveshare_rp2040_pizero
arduino-cli upload -b rp2040:rp2040:waveshare_rp2040_pizero -p /dev/ttyACM0
#!/bin/bash
# remove -l farm from params
# set desirable disk_type
curr_date=$(date --iso-8601)
smart_dir=${curr_date}_smartctl_data
disk_type="ST18000NM008J"
smartctl=$(which smartctl)
#smartctl="/root/usr/local/sbin/smartctl"
[ -d ${smart_dir} ] || echo mkdir ${smart_dir}
lsscsi -i | grep ${disk_type} | grep 0x50 | awk -v smart_dir="$smart_dir" \
-v smartctl="$smartctl" \
'{print smartctl " -x -l farm "$6 " > "smart_dir"/smartctl_-x_-l_farm_"$7".txt"}'
echo "tar cfj $0_${smart_dir}.tar.bz2 ${smart_dir}/*"
Run: bash smartdatacollection.sh | time bash
Save: smartdatacollection.sh_2025-07-30_smartctl_data.tar.bz2
OEL/RedHat Server Setup
sudo dnf update -y
sudo dnf install -y epel-release
sudo dnf groupinstall -y "Xfce" "base-x"
sudo dnf install tigervnc-server firefox
sudo id support
echo ":1=support" | sudo tee -a /etc/tigervnc/vncserver.users
sudo su - support -c "vncpasswd"
sudo systemctl enable --now vncserver@:1
sudo firewall-cmd --add-port=5901/tcp --permanent
sudo firewall-cmd --reload
Session setup (/home/support/.config/tigervnc/config)
session=xfce
geometry=1920x1080
alwaysshared
interface=127.0.0.1
VNC connection
vncviewer -passwd /home/jump/.config/tigervnc/passwd -via server_address_ip 127.0.0.1:5901
# grubby --default-kernel
/boot/vmlinuz-5.15.0-310.184.5.2.el9uek.x86_64
# grubby --info=ALL | grep ^kernel
kernel="/boot/vmlinuz-5.15.0-310.184.5.2.el9uek.x86_64"
kernel="/boot/vmlinuz-5.15.0-302.167.6.el9uek.x86_64"
kernel="/boot/vmlinuz-5.14.0-570.30.1.0.1.el9_6.x86_64"
kernel="/boot/vmlinuz-5.14.0-503.11.1.el9_5.x86_64"
kernel="/boot/vmlinuz-0-rescue-dfbeda345e8248dda7782b18ad072ff3"
# grubby --set-default
/boot/vmlinuz-5.14.0-570.30.1.0.1.el9_6.x86_64
The default is /boot/loader/entries/dfbeda345e8248dda7782b18ad072ff3-5.14.0-570.30.1.0.1.el9_6.x86_64.conf with index 2 and kernel /boot/vmlinuz-5.14.0-570.30.1.0.1.el9_6.x86_64
IMSM versus fakeRAID aka imsm last chance ;) Or how to get Intel VROC with little or no pain (not yet, sorry) ;)
mdadm --create --verbose /dev/md/imsm /dev/sd[ab] --raid-devices 2 --metadata=imsm
mdadm --create --verbose /dev/md/md128 /dev/md/imsm --raid-devices 2 --level 1
Some checkups below (CLI).
Sometimes need some strange things… to do )
Latest image
archlinux-baseline-zfs-2026.03.17-x86_64.iso
sha256
9251b03692cad14a9e2c7609fc98aa7244b1fdd5556c6067b3873dc87dbd1043
Link
# - 2025-06-24 ADD: clonezilla
# - 2025-07-03 ADD: stress-ng
# - 2025-07-30 ADD: multipath-tools dmidecode
# - 2025-08-04 ADD: lzbench-git
# - 2025-08-05 ADD: minicom parallel mbuffer vim \
# vim binwalk binsider diffoscope \
# dhcp bind tcpdump rsync
# CNG: disable audit (BIOS+UEFI boot)
# - 2025-08-30 ADD: iptraf-ng hashcat
# CNG: linux 6.16.x zfs-2.3.4
# - 2025-09-04 ADD: smp-utils
# - 2025-09-05 ADD: /root/smartdatacollection.sh
# - 2025-10-01 ADD: wget
# - 2025-11-20 CNG: linux 6.17.x zfs-2.3.5
# - 2026-01-05 CNG: linux 6.18.x zfs-2.4.0
# ADD: testdisk+photorec ddrescue
# - 2026-03-07 CNG: linux 6.19.x zfs-2.4.1