Simple SSH backup of routeros / mikrotik
karloPrerequisites: A linux host within your network SSH enabled on your router FW routes from host to router Howto: 1. Create ssh keys (without passphrase) on the linux host: ssh-keygen…
Proxmox VLANs ‘on a stick’
Make your bridge interface VLAN aware Add vlans on your bridge Give VMs the bridge interface with tag Example:
T-Mobile thuis (NL) Routeros/Mikrotik-configuratie (met VLANs)
Ik wilde: IP krijgen van T-Mobile (vlan 300 whoo) VLANs tagged op ether2, switch regelt het dan verder Hairpin nat voor load balancer (10.0.60.16) TODO: Firewalling In voorbeeld hieronder is…
Mikrotik routeros various findings
Meaning of service tag Setting use-service-tag=no sets the vlan ethertype to the .q standard of 0x8100Setting use-service-tag=yes sets the vlan ethertype to the .ad standard of 0x88a8 source Set MAC…
jq unix timestamp to datetime
| todateiso8601
Bash script template
#!/usr/bin/env bash set -o errexit set -o nounset set -o pipefail if [[ "${TRACE-0}" == "1" ]]; then set -o xtrace fi if [[ "${1-}" =~ ^-*h(elp)?$ ]]; then echo…
Hash file in windows
cmd: certutil -hashfile z:\desktop\lsr.exe SHA512 or powershell: Get-FileHash -Path z:\desktop\lsr.exe -Algorithm SHA512
Fix: acosh defined in both go and assembly
You probably upgraded go. You need to remove /usr/local/go . Then reinstall go
Indent HTML using tidy
for my own reference: tidy -indent --indent-spaces 2 --quiet --tidy-mark no --wrap 0 --drop-empty-elements no base.html > newbase.html
Github what repos have you contributed to (graphql)
https://docs.github.com/en/graphql/overview/explorer { viewer { repositoriesContributedTo(first: 100, contributionTypes: ) { totalCount nodes { nameWithOwner } } } }
Debian VM as GW routing through VPN (tun) with nftables
My LAN interfaces are ens3/ens8/ens9. VPN tunnel set up using openvpn, gets dev tun0. NFTables config file /etc/nftables.conf (do not forget to enable the nftables services): flush ruleset table inet…
Guacamole broken (Creation of WebSocket tunnel to guacd failed)
Today my guacamole broke. Fixed by putting in guacd settings in the connection settings in guacamole itself. Had to explicitly add ::1 and port 4822 (in my case).
mount LVM2_member
vgscan vgchange -ay srv25centos mount /dev/mapper/srv25centos-root /mnt/srv25
List all ansible facts (facter puppet)
ansible srv46.karloluiten.nl -m ansible.builtin.setup
RPM only list/query package names
rpm -qa --qf "%{NAME}\n"
Mount raw ovirt / kvm disk
losetup -f -P root.img osetup -l mount -o ro /dev/loop* /mnt/
Linux remove last newline from file
perl -pi -e 'chomp if eof' macaroon newline remove
nc in powershell (test remote open port/tcp)
Test-NetConnection -Port 80 -InformationLevel "Detailed" -ComputerName example.com
Simple wireshark filter host+port
ip.src == 10.1.72.1 and tcp.port == 12228
Excel return text right of last occurrence of string
=TRIM(RIGHT(SUBSTITUTE(A1;" ";REPT(" ";LEN(A1)));LEN(A1)))
Update RHEL/CentOS from local repo (iso/cd)
sudo -i mount -o loop /tmp/*77*.iso /mnt cat > /etc/yum.repos.d/cd.repo [cd] name=cd baseurl=file:///mnt/ enabled=1 gpgcheck=0 #[PRESS enter and CTRL-d] yum clean all; rm -rf rm -rf /var/cache/yum; yum makecache fast…
Pihole CORS problems
Fix: edit /var/www/html/admin/scripts/pi-hole/php/auth.php add your host names to AUTHORIZED_HOSTNAMES array
Move cygwin to different disk, including services
Stop all services, log out other users, in process explorer, add command line column, stop all in old pathIn cygwin, go to /cygdrive, cp -vR c/cygwin* d/mount -m > /usr/bin/mountCommands.bat…
ubnt / ubiquiti edgerouter passwordless login ssh keys
ubnt@er4gw:~$ configure [edit] ubnt@er4gw# set system login user ubnt authentication public-keys lb7 type ssh-rsa [edit] ubnt@er4gw# set system login user ubnt authentication public-keys lb7 key AAAA****3tfv0vaEUl ubnt@er4gw# commit ubnt@er4gw# exit…
Convert m4b to mp3 on Centos/Fedora using ffmpeg
for m4b in *.m4b; do ffmpeg -i $m4b -acodec libmp3lame -ar 22050 ${m4b}.mp3; done
Bash remove spaces from file names
find . -depth -name '* *' \ | while IFS= read -r f ; do mv -i "$f" "$(dirname "$f")/$(basename "$f"|tr ' ' _)" ; done
AWK print longest line in file
awk '{ if (length($0) > max) {max = length($0); maxline = $0} } END { print maxline }' YOURFILE
Outlook unblock “unsafe” attachments
Regedit, find: Outlook 2007 [HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security] Outlook 2010 [HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security] Outlook 2013 [HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security] Outlook 2016, Outlook 2019 and Office 365 [HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security] Level1Remove string Value .cer;.exe;.xxx for the stuff you want to unblock.
NPM (node) install fail as root
Do not install as root, or use --unsafe-perm