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This article helps debug the error "ssh: undefined symbol" on SUSE Linux Enterprise Server 15 (SLES15).

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Problem

After updating SLES15 SP1 to SP2 or SP3 you might encounter the following when monitoring something via SSH:

Code Block

language	bash
theme	RDark

fail: ssh: symbol lookup error: ssh: undefined symbol: EVP_KDF_CTX_free, version OPENSSL_1_1_1d

This is a SLES15SP2 issue, and as of now, there is only a workaround. Just add either of those settings in your SSH rule before your commands:

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language	bash
theme	RDark

LD_LIBRARY_PATH=/usr/lib64 ssh root@$HOSTNAME$ /usr/bin/check_mk_agent  

unset LD_LIBRARY_PATH; ssh root@$HOSTNAME$ /usr/bin/check_mk_agent