無断 改悪 コピー ですが 当然全てでは有りません。
http://www.pathname.com/fhs/
http://www.pathname.com/fhs/pub/fhs-2.3.html#BINESSENTIALUSERCOMMANDBINARIES
Requirements The following directories, or symbolic links to directories, are required in /. Directory Description bin Essential command binaries ... /bin : Essential user command binaries (for use by all users) Purpose /bin contains commands that may be used by both the system administrator and by users, but which are required when no other filesystems are mounted (e.g. in single user mode). It may also contain commands which are used indirectly by scripts. Requirements There must be no subdirectories in /bin. The following commands, or symbolic links to commands, are required in /bin. Command Description cat Utility to concatenate files to standard output chgrp Utility to change file group ownership chmod Utility to change file access permissions chown Utility to change file owner and group cp Utility to copy files and directories date Utility to print or set the system data and time dd Utility to convert and copy a file df Utility to report filesystem disk space usage dmesg Utility to print or control the kernel message buffer echo Utility to display a line of text false Utility to do nothing, unsuccessfully hostname Utility to show or set the system's host name kill Utility to send signals to processes ln Utility to make links between files login Utility to begin a session on the system ls Utility to list directory contents mkdir Utility to make directories mknod Utility to make block or character special files more Utility to page through text mount Utility to mount a filesystem mv Utility to move/rename files ps Utility to report process status pwd Utility to print name of current working directory rm Utility to remove files or directories rmdir Utility to remove empty directories sed The `sed' stream editor sh The Bourne command shell stty Utility to change and print terminal line settings su Utility to change user ID sync Utility to flush filesystem buffers true Utility to do nothing, successfully umount Utility to unmount file systems uname Utility to print system information If /bin/sh is not a true Bourne shell, it must be a hard or symbolic link to the real shell command. The [ and test commands must be placed together in either /bin or /usr/bin. Rationale For example bash behaves differently when called as sh or bash. The use of a symbolic link also allows users to easily see that /bin/sh is not a true Bourne shell. The requirement for the [ and test commands to be included as binaries (even if implemented internally by the shell) is shared with the POSIX.2 standard. Specific Options ...
実際に運用中のものでは
# ls /bin Mail@ dialog* install-4.1* more* shred* arch* dir* kill* mount@ stty* bash* dircolors* killall@ mv* su* bash-static* dmesg* ln* netstat* sync* cat* dnsdomainname@ loadkeys* nisdomainname@ tar* chgrp* domainname@ login* pidof@ tar-static* chmod* du* ls* ping* tcsh* chown* echo* lsmod* ps* touch* chroot* ed* lsmod.old@ pwd* true* cp* false* mail@ red@ umount@ csh@ groups* mailx@ rm* uname* cut* gzip@ mkdir* rmdir* vdir* date* head* mkfifo* setterm* vigr@ dd* hostname* mknod* sg@ ypdomainname@ df* install* mktemp* sh@ zsh@
にゃんたろう 拝！
2010年 8月23日 (月) 21:09:47 JST 作成