$apropos 5 passwd egrep add
CPU_ELAN(4) - AMD Elan 520 CPU support
CTR0(9), CTR1(9), CTR2(9), CTR3(9), CTR4(9), CTR5(9) - kernel tracing facility
MD5(9), MD5Init(9), MD5Transform(9) - message digest routines
MD5Init(3), MD5Update(3), MD5Pad(3), MD5Final(3), MD5End(3), MD5File(3), MD5FileChunk(3), MD5Data(3) - calculate the RSA Data Security, Inc., ``MD5'' message digest
SHA256_Init(3), SHA256_Update(3), SHA256_Final(3), SHA256_End(3), SHA256_File(3), SHA256_FileChunk(3), SHA256_Data(3) - calculate the FIPS 180-2 ``SHA-256'' message digest
a.out(5) - format of executable binary files
acct(5) - execution accounting file
adduser.conf(5) - adduser(8) configuration file
aliases(5) - aliases file for sendmail
alpm(4) - Acer Aladdin 15x3 Power Management controller driver
amd(4) - amd53c974 PCI SCSI driver
amd.conf(5) - amd configuration file
amdpm(4) - AMD 756 Power Management controller driver
an(4) - Aironet Communications 4500/4800 wireless network adapter driver
ancontrol(8) - configure Aironet 4500/4800 devices
arl(4) - Aironet Arlan 655 wireless network adapter driver
arlcontrol(8) - configure Aironet Arlan 655 device
audit.log(5), audit(5) - Basic Security Module (BSM) file format
audit_class(5) - audit event class descriptions
audit_control(5) - audit system parameters
audit_event(5) - audit event descriptions
audit_user(5) - events to be audited for given users
audit_warn(5) - alert when audit daemon issues warnings