sergeyklay

#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1

sergeyklay

[Unit]
Description=My service

[Service]
ExecStart=/usr/local/bin/my-service \
  -argument value \
  -otherargument othervalue

# Setuid/Setgid
User=nobody

sergeyklay

GPG: Import and export instructions

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Export keys and ownertrust

gpg --export --armor 1E0B5331219BEA88 > 1E0B5331219BEA88.pub.asc
gpg --export-secret-keys --armor 1E0B5331219BEA88 > 1E0B5331219BEA88.priv.asc
gpg --export-secret-subkeys --armor 1E0B5331219BEA88 > 1E0B5331219BEA88.sub_priv.asc

gpg --export-ownertrust > ownertrust.txt

sergeyklay

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

sergeyklay

# Run this once
openssl genrsa -des3 -out ca.key 4096
openssl req -new -x509 -days 365 -key ca.key -out ca.crt