Instructions tested with a Raspberry Pi 2 with an 8GB memory card. Probably also works fine on a Raspberry Pi 3.
Download the latest Raspbian Jessie Light image. Earlier versions of Raspbian won't work.
Write it to a memory card using Etcher, put the memory card in the RPi and boot it up.
| java -jar yourApp.jar [JVM_OPTIONS] | |
| For local host access only JVM_OPTIONS are: | |
| -Dcom.sun.management.jmxremote | |
| -Dcom.sun.management.jmxremote.port=9010 | |
| -Dcom.sun.management.jmxremote.host=127.0.0.1 | |
| -Dcom.sun.management.jmxremote.local.only=true | |
| -Dcom.sun.management.jmxremote.authenticate=false | |
| -Dcom.sun.management.jmxremote.ssl=false |
mainly used in start-up script
When we play with iptables aka firewall we might end up in situation, where we execute rule, which has unforseen impact - lock yourself out. Recovering from this situation is necessity.
How to:
- Enable reboot via SMS.
- Test all commands in shell first before putting them into Start-up script. This way the command will be wiped out, when unit is rebooted.
| WITH table_scans as ( | |
| SELECT relid, | |
| tables.idx_scan + tables.seq_scan as all_scans, | |
| ( tables.n_tup_ins + tables.n_tup_upd + tables.n_tup_del ) as writes, | |
| pg_relation_size(relid) as table_size | |
| FROM pg_stat_user_tables as tables | |
| ), | |
| all_writes as ( | |
| SELECT sum(writes) as total_writes | |
| FROM table_scans |
| #!/usr/bin/env python | |
| """Simple HTTP Server With Upload. | |
| This module builds on BaseHTTPServer by implementing the standard GET | |
| and HEAD requests in a fairly straightforward manner. | |
| """ |