postgres запускается, но не запускается

# psql
psql: could not connect to server: Connection refused
        Is the server running locally and accepting
        connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

# psql
psql: could not connect to server: Connection refused
        Is the server running locally and accepting
        connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

# cd /var/lib/postgresql/9.5; ls
main


/var/lib/postgresql/9.5/main# ls
base    pg_clog       pg_dynshmem  pg_multixact  pg_replslot  pg_snapshots  pg_stat_tmp  pg_tblspc    PG_VERSION  postgresql.auto.conf
global  pg_commit_ts  pg_logical   pg_notify     pg_serial    pg_stat       pg_subtrans  pg_twophase  pg_xlog     postmaster.opts

# systemctl list-units|grep postgres
  postgresql.service                                                          loaded active     exited           PostgreSQL RDBMS
● postgresql@9.5-main.service                                                 loaded failed     failed           PostgreSQL Cluster 9.5-main
  system-postgresql.slice                                                     loaded active     active           system-postgresql.slice

#  systemctl start postgresql@9.5-main.service
Job for postgresql@9.5-main.service failed because the control process exited with error code. See "systemctl status postgresql@9.5-main.service" and "journalctl -xe" for details.

#!/bin/sh
set -e

### BEGIN INIT INFO
# Provides:             postgresql
# Required-Start:       $local_fs $remote_fs $network $time
# Required-Stop:        $local_fs $remote_fs $network $time
# Should-Start:         $syslog
# Should-Stop:          $syslog
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    PostgreSQL RDBMS server
### END INIT INFO

# Setting environment variables for the postmaster here does not work; please
# set them in /etc/postgresql/<version>/<cluster>/environment instead.

[ -r /usr/share/postgresql-common/init.d-functions ] || exit 0

. /usr/share/postgresql-common/init.d-functions

# versions can be specified explicitly
if [ -n "$2" ]; then
    versions="$2 $3 $4 $5 $6 $7 $8 $9"
else
    get_versions
fi

case "$1" in
    start|stop|restart|reload)
        if [ "$1" = "start" ]; then
            create_socket_directory
        fi
        if [ -z "`pg_lsclusters -h`" ]; then
            log_warning_msg 'No PostgreSQL clusters exist; see "man pg_createcluster"'
            exit 0
        fi
        for v in $versions; do
            $1 $v || EXIT=$?
        done
        exit ${EXIT:-0}
        ;;
    status)
        LS=`pg_lsclusters -h`
        # no clusters -> unknown status
        [ -n "$LS" ] || exit 4
        echo "$LS" | awk 'BEGIN {rc=0} {if (match($4, "down")) rc=3; printf ("%s/%s (port %s): %s\n", $1, $2, $3, $4)}; END {exit rc}'
        ;;
    force-reload)
        for v in $versions; do
            reload $v
        done
        ;;
    *)
        echo "Usage: $0 {start|stop|restart|reload|force-reload|status} [version ..]"
        exit 1
        ;;
esac

exit 0

-- Logs begin at Wed 2017-11-08 12:05:11 MSK, end at Wed 2017-11-08 13:06:01 MSK. --
Nov 08 12:36:27 82608.local systemd[1]: Starting PostgreSQL Cluster 9.5-main...
Nov 08 12:36:58 82608.local postgresql@9.5-main[5913]: The PostgreSQL server failed to start. Please check the log output.
Nov 08 12:36:58 82608.local systemd[1]: postgresql@9.5-main.service: Control process exited, code=exited status=1
Nov 08 12:36:58 82608.local systemd[1]: Failed to start PostgreSQL Cluster 9.5-main.
Nov 08 12:36:58 82608.local systemd[1]: postgresql@9.5-main.service: Unit entered failed state.
Nov 08 12:36:58 82608.local systemd[1]: postgresql@9.5-main.service: Failed with result 'exit-code'.

pg_ctlcluster --skip-systemctl-redirect 9.5 main start

# pg_ctlcluster --skip-systemctl-redirect 9.5 main start
The PostgreSQL server failed to start. Please check the log output.

# df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            227M     0  227M   0% /dev
tmpfs            49M  7.5M   42M  16% /run
/dev/vda1       4.8G  4.8G     0 100% /
tmpfs           245M     0  245M   0% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           245M     0  245M   0% /sys/fs/cgroup
tmpfs            49M     0   49M   0% /run/user/0