Hi, Can I know why tpm2 tools is not working. Below are logs. Thank you for the help in advace. [root@myhost ~]# tpm2_pcrread ** (process:3459977): WARNING **: 17:05:49.915: Failed to create connection with service: Timeout was reached WARNING:tcti:src/tss2-tcti/tctildr.c:79:tcti_from_init() TCTI init for function 0x7f0481c01ac0 failed with a0008 WARNING:tcti:src/tss2-tcti/tctildr.c:109:tcti_from_info() Could not initialize TCTI named: tcti-abrmd ERROR:tcti:src/tss2-tcti/tctildr-dl.c:150:tcti_from_file() Could not initialize TCTI file: libtss2-tcti-tabrmd.so.0 (and hangs) [root@myhost ~]# cat /etc/os-release NAME="CentOS Linux" VERSION="8 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="8" ... ... Version info: [root@myhost~]# rpm -qa | grep tpm2 tpm2-tss-2.4.3.x86_64 tpm2-tools-4.3.0.x86_64 tpm2-abrmd-2.3.3.x86_64 [root@myhost ~]# service tpm2-abrmd status Redirecting to /bin/systemctl status tpm2-abrmd.service ● tpm2-abrmd.service - TPM2 Access Broker and Resource Management Daemon Loaded: loaded (/usr/lib/systemd/system/tpm2-abrmd.service; enabled; vendor preset: disabled) Active: active (running) since Mon 2020-12-14 16:48:42 PST; 15min ago Main PID: 3422797 (tpm2-abrmd) IO: 0B read, 0B written Tasks: 4 Memory: 2.0M CPU: 49ms CGroup: /system.slice/tpm2-abrmd.service └─3422797 /usr/sbin/tpm2-abrmd Warning: journal has been rotated since unit was started, output may be incomplete. Thanks, Chenxi