man を探すのに正規表現使いたいじゃん

man -k ssh 
#....結果が多すぎる

man -k は単純マッチなので、grep で絞り込む必要がる。でも、毎回やってると面倒だし。ssh検索して、libssh とか殆どの場合で関係ないでしょ

whatis コマンドがある。

whatis -r 正規表現

whatis コマンドが良い代替になると思う

takuya@atom:~$ whatis -r  '^ssh.*'
ssh (1)              - OpenSSH SSH client (remote login program)
ssh-add (1)          - adds private key identities to the authentication agent
ssh-agent (1)        - authentication agent
ssh-argv0 (1)        - replaces the old ssh command-name as hostname handling
ssh-copy-id (1)      - install your public key in a remote machine s authorized_keys
ssh-keygen (1)       - authentication key generation, management and conversion
ssh-keyscan (1)      - gather ssh public keys
ssh-keysign (8)      - ssh helper program for host-based authentication
ssh-pkcs11-helper (8) - ssh-agent helper program for PKCS#11 support
ssh-vulnkey (1)      - check blacklist of compromised keys
ssh_config (5)       - OpenSSH SSH client configuration files
sshd (8)             - OpenSSH SSH daemon
sshd_config (5)      - OpenSSH SSH daemon configuration file