soumitra bhandary wrote: > 2019-04-17 10:15:48.752 IST [15386] LOG: database system is ready to accept read only connections > 2019-04-17 10:15:48.755 IST [15393] FATAL: could not load library "/usr/pgsql-11/lib/libpqwalreceiver.so": /usr/pgsql-11/lib/libpq.so.5: symbol X509_get_signature_nid, version libcrypto.so.10 not defined in file libcrypto.so.10 with link time reference That means that you have a bad version of libcrypto.so installed, which is part of the openssl-libs RPM. You could rpm -e --nodeps openssl-libs openssl and then yum install openssl openssl-libs to remove and reinstall the package. Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com