Miscellaneous

• Invert image colors gm convert <input> -negate <output>

• Copy directory recursively cp -r /source/ /dest/

• curl basic auth: curl -u username:password https://example.com

• Trigger sentry cleanup docker exec sentry_onpremise_sentry-cleanup_1 gosu sentry sentry cleanup --days <number of days>

• Check TLS version of a website openssl s_client -connect example.com:443 -tls1_2

• Fill memory cat /dev/zero | head -c 3G | tail