Kill all processes of a user

pkill -u username

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Clear SSSD cache on Linux machine if there's a record update in LDAP

sss_cache -E           # Invalidate all cached entries
sss_cache -u username  # for specific user
sss_cache -U           # for all users
sss_cache -g groupname # for specific group
sss_cache -G           # for all groups

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