Linux systems are usually configured to install the TSM client from the OUCS HFS repository. This is done by installing the oucs-hfs-repo package which sets up the repository and installs a public signing key that is then used to confirm that packages installed from the repository come from a trusted source. (The repository or packages are signed with the corresponding private key). If you wish to confirm the key is correct after you have installed the oucs-hfs-repo package then use one of the following procedures depending on what Linux variant you are using
apt-key finger | grep HFS -C 2
pub 1024D/EF91DF05 2011-02-24 Key fingerprint = 60AC EDB6 980E A06D 4879 9299 CDBD F30C EF91 DF05 uid IT Services HFS Team (GPG signing key) <firstname.lastname@example.org> sub 1024g/2EB4A12C 2011-02-24
Note that depending on when the key was first installed it may say OUCS instead of IT Services. If the key fingerprint does not match that shown above then contact email@example.com for advice.
rpm -qi gpg-pubkey-ef91*
Name : gpg-pubkey Relocations: (not relocatable) Version : ef91df05 Vendor: (none) Release : 514092d6 Build Date: Fri 24 May 2013 03:41:55 PM BST Install Date: Fri 24 May 2013 03:41:55 PM BST Build Host: localhost Group : Public Keys Source RPM: (none) Size : 0 License: pubkey Signature : (none) Summary : gpg(IT Services HFS Team (GPG signing key) <firstname.lastname@example.org>) Description : -----BEGIN PGP PUBLIC KEY BLOCK----- Version: rpm-4.8.0 (NSS-3) mQGiBE1mPrgRBADibg8ZFQrLqDSX7RVXEM7+6VUqJG/DdIQcKqI0DD6rDmbjLcuv XiwTDfRaCkAgEXOMeLQ+X1me8CUJEtYWH1/HQGpBlE+7twyZNFtLXfLt8cUOc2e+ i+4WIH6Wo/Ww6rCiCDw6eKlIRCGlote8fLpAtaKJmPlHElnbEvRlVVixRwCgovSr f5tqGYTAoCYIlldUx0noP9UEANoThe0YpO7ON7WU43ulRhT3qRmO7u06D5ZI497M 3Gfp+kpdPzAIjdbZMpKS/JxZ3ItrWHcqcVYbLNbQ2BX7gYdDgWPwHZIYdpgmi281 gezuuLX0vUHolOszPQvdY/lakC7SEEX+0OH8+CmywuYE9EaEoILexD5V1zUp4iAO zrcQA/486/zI9f3EtFpYIILS3fPqG50jJZeMptHLh8H3tcUcDay7+V5JHZes2Kqo Q9Kki6tsK4Wr6alUVgjIrzpjLU6T9tzKjS7H4aXxCO1+pN6qMI0U1nphj3YlcoPj nFrfOoEm+OL/hznnzL/C17W7+obGBhqh3Y1CYAAAo6yMQ4Ry07Q1SVQgU2Vydmlj ZXMgSEZTIFRlYW0gKEdQRyBzaWduaW5nIGtleSkgPGhmc0BveC5hYy51az6IYgQT EQIAIgUCUUCS1gIbAwYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AACgkQzb3zDO+R 3wUSFACfXOVhg/Ey2pBd8gZtcEwbgbX19K4AoJgalJKf0KQ9puuLgyyeuVGW1oOR uQENBE1mPrkQBAC1zmVaqpYZpj7cej5qWkM5y5MdXyblfRrqfFZSc1oKJb9zPejv zUxIPntZloNkOlJCqnT3ZQTegTIMcL0schplaG4IFeQLpkLGFbuOVOWCbghe8Qtz uMaPQw5D4d/SasFTJjQZfJ6pxP0k3zWaaqKZ+6s9B2VV1RUmXMxLMxooNwAFFwQA ourf11y81fCifo3xc2LrIo5Aoer26TIl5jwJR4VwXyZaxgJOaASe/Eq1y4xE+hFr zz6AGvSk6PrUGRyJbOlpDv9JeedjTNgxdD1awG+YyMuVooN/QKO+l48d/RPAA8+9 0/6QPzEIWh+M3CSD0YRu1lw23LU59NN99BEvA+F1ppaISQQYEQIACQUCTWY+uQIb DAAKCRDNvfMM75HfBc7XAJoDHBEIxPY7+WpBZiC20grO8Mbg+ACeNwoEidRiQDes /3ZeA2W5FYWlqcg= =h2eC -----END PGP PUBLIC KEY BLOCK-----
Note that depending on your version of rpm the layout may be slightly different. You should also expect the dates and possibly the rpm version values to be different. Depending on when the key was first installed it may say OUCS instead of IT Services. The important part is the PGP public key block but note that it may be broken into longer or shorter lines than the above. Taking that into account, if the key details do not match those shown above then contact email@example.com for advice.