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# get external ip | |
wget -q -O - checkip.dyndns.org | sed -e 's/.*Current IP Address: //' -e 's/<.*$//' | |
# javafy regex | |
echo '/^\d{5}\\(?:[-\s]\d{4})?$/' | sed 's/\\/\\\\/g' | |
# loop to make dirs | |
for i in {1..5}; do mkdir unit$i; done |
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-- postgres snippets | |
-- show databases owned by a specific user | |
psql -d postgres -c "SELECT datname FROM pg_database JOIN pg_authid ON pg_database.datdba = pg_authid.oid WHERE rolname = 'rolename'" | |
-- see all active sessions | |
SELECT * FROM pg_stat_activity; | |
-- kill sessions | |
SELECT pg_terminate_backend(pg_stat_activity.pid) FROM pg_stat_activity WHERE pg_stat_activity.datname = 'dbname' AND pid <> pg_backend_pid(); |
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