Fixing Smokeping after Debian Wheezy to Jessie upgrade: Apache 2.2 to 2.4 migration breaks conf.d structure, requiring manual symlinks in conf-enabled directory for smokeping and OTRS configurations.
Converting Nagios log timestamps to human-readable format using Perl one-liner: piping epoch timestamps through localtime() substitution for on-the-fly date conversion in monitoring logs and BGP data.
Creating RPSL objects in ARIN's Internet Routing Registry: setting up MNTNER with MD5 authentication, generating route/inetnum objects via email templates, and validating IRR entries for BGP prefix filtering automation.
Fixing macOS Yosemite trash items that won't delete: using CLI to remove immutable flags with chflags -R nouchg and force deletion when GUI methods fail.
Configuring RSA public key authentication on Cisco IOS 15 switches/routers: using ip ssh pubkey-chain for passwordless SSH, handling 254-character line length limits on 2960/3560 platforms, and enforcing SSHv2.
