man

在 Linux 中常常需要執行指令，在不知道指令或是參數之前都會看手冊 使用 man 指令時，容易因為有相同名稱檔案或指令而導致看錯手冊 舉個例子像是 passwd passwd 這同時有指令 /usr/bin/passwd 的手冊，也是檔案 /etc/passwd 的手冊 這時需要查一下有哪些 manual 查名稱有 passwd 的手冊 man -f passwd passwd (1) - change user password passwd (1ssl) - compute password hashes passwd (5) - the password file -f, --whatis: same as whatis(1). Search for all words in expression in manual page names only. 查名稱包含 passwd 的手冊 man -k passwd chgpasswd (8) - update group passwords in batch mode chpasswd (8) - update passwords in batch mode gpasswd (1) - administer /etc/group and /etc/gshadow grub-mkpasswd-pbkdf2 (1) - generate hashed password for GRUB mkpasswd (1) - Overfeatured front end to crypt(3) openssl-passwd (1ssl) - compute password hashes pam_localuser (8) - require users to be listed in /etc/passwd passwd (1) - change user password passwd (1ssl) - compute password hashes passwd (5) - the password file update-passwd (8) - safely update /etc/passwd, /etc/shadow and /etc/group -k, --apropos: same as apropos(1)....