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[Appendix B] Important Files
su Become the superuser, or change your current user ID
sysadmsh System administrator's shell
telnet Becomes a terminal on another machine
tip Calls another machine
umask Changes your umask (shell built-in)
users Prints users logged in
uucheck Checks UUCP security
uucico Transfers UUCP files
uucp Queues files for transfer by UUCP
uudecode Decodes uu-encoded files
uux Queues programs for execution by UUCP
w Prints what people are doing
who Prints who is logged in
write Prints messages on another's terminal
xhost Allows other hosts to access your X Window Server
XScreensaver Clears and locks an X screen
yppasswd Changes your NIS password
B.1.5 /etc Programs
The following programs are typically placed in the /etc, /sbin, /usr/sbin, or /usr/etc directories.
Name Description
accton Turns on accounting
arp Address resolution protocol
comsat Alerts to incoming mail
dmesg Prints messages from system boot
exportfs Export a filesystem (Berkeley)
fingerd or in.fingerd Finger daemon
ftpd or in.ftpd FTP daemon
fsck Filesystem-consistency checker
getty Prints login:
inetd Internet daemon
init First program to run
lockd lock daemon
lpc Line-printer control
makekey Runs crypt() library routine (in /usr/lib)
mount Mounts partitions
ntalkd Talk daemon
ping Network test program
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