Updated settings and commandline articles

commandline/README.md

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+# Postgres commandline tools
+
+## pg_ctl
+
+## 

configuration/README.md

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+# FILES
+
+## Logs
+
+Log files can be found in two places. The most recent log file will be located in the postgres data directory.  Other log files will be located via a config setting typically set to directory under the data directory. This can be found using the `SHOW log_directory` sql commnad.
+
+## Config files
+
+The configuration files are located directly under the
+
+- postgresql.conf -
+- postgres.auto.conf -
+- pg_hba.conf -
+-

configuration/conf.sql

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+
+-- REOAD and RESTART
+--
+-- As a superuser you can trigger a configuration reload with
+-- SELECT pg_reload_conf();
+-- Some config(fundamental) changes require a restart. Use the cmd commands:
+-- `service postgresql-<your version> restart`
+-- `pg_ctl restart -D <your data dirctory>`
+
+-- LOCATION OF CONFIG FILES
+--
+SELECT name, setting
+FROM pg_settings
+WHERE category = 'File Locations';
+
+-- CHECK postgresql.conf SETTINGS
+--
+SELECT name, context, unit, setting, boot_val, reset_val
+FROM pg_settings
+WHERE name IN ('listen_addresses', 'deadlock_timeout', 'shared_buffers',
+  'effective_cache_size', 'work_mem', 'maintenance_work_mem')
+ORDER BY context, name;
+
+
+-- SHOW keyword
+-- We can use the SHOW sql command to display settings with a labeled  results in a labeled
+SHOW ALL;
+-- Individual settings can also be shown
+SHOW work_mem;
+
+--ALTER postgresql.conf SETTINGS
+-- ALTER SYSTEM SET work_mem = '500MB';