PostgreSQL Study (4)

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/var/lib/postgresql

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/var/lib/postgresql/9.1/main
$ ls -F /var/lib/postgresql
9.1/

$ ls -F /var/lib/postgresql/9.1
main/

$ ls -F /var/lib/postgresql/9.1/main
base/          pg_stat_tmp/  postmaster.opts
global/        pg_subtrans/  postmaster.pid
pg_clog/       pg_tblspc/    server.crt@
pg_multixact/  pg_twophase/  server.key@
pg_notify/     PG_VERSION
pg_serial/     pg_xlog/

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