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whatis rc
rc(8) - command scripts for auto-reboot and daemon startup
ÕâЩ½Å±¾Êµ¼ÊλÓÚ/etc/rc£»Í¨³££¬Î»ÓÚ/etcϵÄÕâ¸öÅäÖÃÎļþ¶ÔÓ¦ÓÚÊÖ²áµÄµÚÎ岿·Ö£¬ËùÒÔÄã¿ÉÒÔ¸ù¾ÝÊÖ²á¶ÔÅäÖÃÎļþ×÷ÕýÈ·µØÐ޸ġ£µ«ÊÇ£¬Èç¹ûÄã´ò£º

man 5 rc
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No entry for rc in section 5 of the manual
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more /etc/rc
# System startup script run by init on autoboot
# or after single-user.
# Output and error are redirected to console by init,
# and the console is the controlling terminal.
# Note that almost all of the user-configurable behavior
# is no longer in # this file, but rather in /etc/defaults/rc.conf.
# Please check that file first before contemplating any changes
# here. If you do need to change this file for some reason, we
# would like to know about it.
ºÃ£¬Ï൱ÇåÎú£»¿´À´¶ÔÓÚ¸ÃÎļþÎÒÃÇ×Ô¼ºÊDz»ÄÜÂÒÀ´µÄ¡£ÕâÀïÓÐЩÏ൱ÖØÒªµÄ¶«Î÷¶ÔÓÚÕýÈ·Òýµ¼ÎÒÃǵÄϵͳËù±ØÐëµÄ¡£ÈÃÎÒÃÇÍùºóÌø£¬¿´Ò»Ð©ÖØÒªµÄ²¿·ÖÀ´ÕÒ³öÆô¶¯Ê±Êµ¼ÊÉ϶¼·¢ÉúÁËЩʲô¡£×¢Òâµ±ÔÚÒýµ¼¹ý³ÌÖд¦Àírc½Å±¾Ê±£¬init»á°ÑËùÓеÄÊä³öºÍ´íÎóÐÅÏ¢¼Ç¼µ½ÖÕ¶ËÉÏ¡£

rcÊ×ÏÈ×öµÄÊÂÖ®Ò»¾ÍÊÇÉèÖ÷¾¶±äÁ¿£¬ÒÔʹËü¿ÉÒÔÕÒµ½ÄãFreeBSDϵͳÉϵĿÉÖ´ÐгÌÐò£º

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin
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# If there is a global system configuration file, suck it in.
if [ -f /etc/defaults/rc.conf ]; then
. /etc/defaults/rc.conf
elif [ -f /etc/rc.conf ]; then
. /etc/rc.conf
fi
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echo Automatic boot in progress...
fsck -p
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# Mount everything except nfs filesystems.
mount -a -t nonfs
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adjkerntz -i
È»ºóÕûÀívarĿ¼£¬½«Òýµ¼ÐÅϢдÈëdmesg.boot£º

clean_var() {
if [ ! -f /var/run/clean_var ]; then
rm -rf /var/run/*
find /var/spool/lock ! -type d -delete
rm -rf /var/spool/uucp/.Temp/*
# Keep a copy of the boot messages around
dmesg >/var/run/dmesg.boot
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/etc/rc.sysctl
/etc/rc.serial
/etc/rc.pccard
/etc/rc.network
/etc/rc.network6
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# Whack the pty perms back into shape.
chflags 0 /dev/tty[pqrsPQRS]*
chmod 666 /dev/tty[pqrsPQRS]*
chown root:wheel /dev/tty[pqrsPQRS]*
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# Clean up left-over files
# Clearing /tmp at boot-time seems to have a long tradition. It doesn't
# help in any way for long-living systems, and it might accidentally
# clobber files you would rather like to have preserved after a crash
# (if not using mfs /tmp anyway).
# See also the example of another cleanup policy in /etc/periodic/daily.
# Remove X lock files, since they will prevent you from restarting X11
# after a system crash.
ÏÖÔÚrc×¼±¸Æô¶¯Ò»Ð©ºǫ́½ø³Ì£¬Ê×ÏÈÊÇsyslogdºÍnamed£º

# Start system logging and name service. Named needs to start before syslogd
# if you don't have a /etc/resolv.conf.
È»ºóÊÇinetd¡¢cron¡¢lpd¡¢sendmail¡¢sshdºÍusbd£º

# Now start up miscellaneous daemons that don't belong anywhere else
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(/etc/rcÎļþ½áβ)
µ±µ½´ï/etc/rcµÄ½áβʱ£¬rcµÄ¹¤×÷¾ÍÍê³ÉÁË¡£ÔÚ´ËÎÒÃÇÖØлعËһϣºinitµ÷ÓÃrc½Å±¾£¬Ëü»á¶ÁȡһЩȫ¾ÖµÄºÍ±¾µØµÄÅäÖÃÎļþÒÔÕýÈ·×°ÔØÎļþϵͳ²¢½¨Á¢ÏµÍ³ºǫ́½ø³Ì¿ÉÒÔÆô¶¯µÄ»·¾³¡£ÄãµÄ²Ù×÷ϵͳÏÖÔÚÒѾ­Æô¶¯²¢ÔËÐÐ×Å£¬µ«µ½´ËΪֹ£¬»¹Ã»ÓÐÒ»¸öÓû§¿ÉÒÔÓë²Ù×÷ϵͳʵ¼Ê½»»¥µÄ»·¾³¡£Õâ¾ÍÊÇinitµÚ¶þ¸öÖØÒªµÄ¹¦ÄÜ¡£

ÅäÖÃÎļþ/etc/ttys½«»á±»¶ÁÈ¡ÒÔ¾ö¶¨³õʼ»¯µÄÖնˡ£²»Ïó/etc/rc£¬¸ÃÎļþ¿ÉÒÔÓɳ¬¼¶Óû§¾­³£±à¼­ÒÔÈ·±£ÈÃinitÀ´³õʼ»¯ËùÐèµÄÖնˡ£

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more /etc/ttys
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À¸Ãû
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name
ÖÕ¶ËÉ豸µÄÃû³Æ

getty
ÔÚÖÕ¶ËÉÏÆô¶¯ÔËÐеijÌÐò£¬Í¨³£Îªgetty¡£ÆäËüÏîÄ¿°üÀ¨xdm£¬ËüÓÃÀ´Æô¶¯X Windowϵͳ£¬»ònone£¬ËµÃ÷ûÓгÌÐò¡£

type
¶ÔÓÚÐéÄâÖնˣ¬¶ÔÓ¦µÄÀàÐÍΪcons25¡£ÆäËüͨ³£µÄÖµ°üÀ¨Î±ÖÕ¶Ënetwork£¬µ÷Öƽâµ÷Æ÷Èë¿Údialup£¬ÒÔ¼°unknown£¬ÓÃÓÚÓû§ÊÔͼÒÔÎÞ·¨Ô¤¶¨µÄÀàÐͽøÐÐÁ¬½ÓµÄÖնˡ£

status
Ëü±ØÐëÊÇon»òoff¡£Èç¹ûÊÇon£¬init½«ÔËÐÐgettyÀ¸Ö¸¶¨µÄ³ÌÐò¡£Èç¹û³öÏÖµ¥´Ê¡°secure¡±£¬ËµÃ÷¸ÃttyÔÊÐírootµÇ¼£»Îª±ÜÃâÕâÖÖÇé¿ö£¬¿ÉÒÔÓõ¥´Ê¡°insecure¡±¡£


ÈÃÎÒÃÇ´ÓÐéÄâÖն˲¿·Ö¿ªÊ¼½âÊ͸ÃÎļþ£»¿ÉÒÔ¿´µ½ËüÊÇÒÔÉèÖÿØÖÆ̨¿ªÊ¼µÄ£º

# If console is marked "insecure", then init will ask
# for the root password when going to single-user mode.
console none unknown off secure
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ttyv0 "/usr/libexec/getty Pc" cons25 on secure
# Virtual terminals
ttyv1 "/usr/libexec/getty Pc" cons25 on secure
ttyv2 "/usr/libexec/getty Pc" cons25 on secure
ttyv3 "/usr/libexec/getty Pc" cons25 on secure
ttyv4 "/usr/libexec/getty Pc" cons25 on secure
ttyv5 "/usr/libexec/getty Pc" cons25 on secure
ttyv6 "/usr/libexec/getty Pc" cons25 on secure
ttyv7 "/usr/libexec/getty Pc" cons25 on secure
ttyv8 "/usr/X11R6/bin/xdm -nodaemon" xterm off secure
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# Serial terminals
# The 'dialup' keyword identifies dialin lines to login, fingerd etc.
ttyd0 "/usr/libexec/getty std.9600" dialup off secure
ttyd1 "/usr/libexec/getty std.9600" dialup off secure
ttyd2 "/usr/libexec/getty std.9600" dialup off secure
ttyd3 "/usr/libexec/getty std.9600" dialup off secure
Äã¿ÉÒÔ¿´µ½ÎÒÓÐËĸö¿É»ñµÃµÄ²¦ºÅÖնˣ¬µ«ËüÃǶ¼±»¹Ø±ÕÁË¡£Èç¹ûÎÒÏëÈÃÓû§Í¨¹ýµ÷Öƽâµ÷Æ÷·ÃÎÊÎÒµÄFreeBSDϵͳ£¬ÎҾͱØÐëÖÁÉÙ´ò¿ªËüÃÇÖеÄÒ»¸ö£¬»¹±ØÐë¾ö¶¨ÊÇ·ñÈÃÕâЩÓû§¿ÉÒÔÓÃrootÉí·ÝµÇ¼£»Èç¹û²»£¬¾Í°Ñµ¥´Ê¡°secure¡±¸ÄΪ¡°insecure¡±¡£ÄãÊÇ·ñ¿´µ½gettyÀ¸º¬ÓÐÊý×Ö9600£¬Ëü˵Ã÷Êý¾Ý´«ÊäÂÊΪ9600bps¡£ÒòΪÏÖÔںܶàµ÷Öƽâµ÷Æ÷¶¼Óиü¸ßµÄËÙÂÊ£¬ÎÒÒ²¿ÉÒÔ°ÑËü¸ÄΪ57600¡£×îºó£¬×îºÃ¶ÁÒ»ÏÂFreeBSD handbookÖеIJ¦ºÅ·þÎñ²¿·Ö¡£

/etc/ttysÎļþµÄ×îºóÒ»²¿·ÖÊÇÍøÂç»òαÖնˡ£Äã»á¿´µ½ËüÃÇÓкܶ࣬׼ȷµØ˵ÊÇ255¸ö£¬·¶Î§´Ó£º

# Pseudo terminals
ttyp0 none network

µ½

ttySv none network
ÇÒȱʡÇé¿öÏÂËüÃǶ¼Ã»Óб»ÔÊÐí¡£

Èç¹ûÄãΪÁËʹ/etc/ttys¸ü¸ÄÉúЧÒÔʹinitʹÓÃÕâЩ¸ü¸Ä£¬¿ÉÒÔ³¬¼¶Óû§µÄÉí·ÝÏòinit·¢ËÍÒ»¸öHUPÐźţ¬È磺

kill -1 1
ÕâÀïÇ°ÃæµÄ-1´ú±íÐźÅ1(HUP)£¬¶øºóÃæ1´ú±í½ø³Ì1(init)¡£

ÄÇôÏÖÔÚ£¬Äĸö/etc/ttysÎļþÖÐÌáµ½µÄgetty³ÌÐò¼ÌÐø±£³ÖÔËÐÐÄØ£¿man 8ÖжÔgettyµÄÃèÊöÈçÏ£º

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ps -ax
PID TT STAT TIME COMMAND
0 ?? DLs 0:00.01 (swapper)
1 ?? ILs 0:00.16 /sbin/init --
2 ?? DL 0:00.02 (pagedaemon)
3 ?? DL 0:00.00 (vmdaemon)
4 ?? DL 0:00.02 (bufdaemon)
5 ?? DL 0:01.02 (syncer)
1056 ?? Is 0:00.00 adjkerntz -i
1187 ?? Ss 0:00.08 syslogd -s
1206 ?? Is 0:00.05 inetd -wW
1208 ?? Is 0:00.11 cron
1622 ?? Ss 0:00.02 sendmail: accepting connections on port 25 (sendmail)
1621 v0 Ss 0:00.12 -csh (csh)
1701 v0 R+ 0:00.00 ps -ax
1699 v1 Is+ 0:00.01 /usr/libexec/getty Pc ttyv1
1619 v2 Is+ 0:00.01 /usr/libexec/getty Pc ttyv2
1618 v3 Is+ 0:00.01 /usr/libexec/getty Pc ttyv3
1617 v4 Is+ 0:00.01 /usr/libexec/getty Pc ttyv4
1616 v5 Is+ 0:00.01 /usr/libexec/getty Pc ttyv5
1615 v6 Is+ 0:00.01 /usr/libexec/getty Pc ttyv6
1614 v7 Is+ 0:00.01 /usr/libexec/getty Pc ttyv7
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  1. rty ÓÚ 2005-11-23 00:17:29·¢±í:

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  2. aini ÓÚ 2005-10-07 00:16:50·¢±í:

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