/var and /proc/kmsg

~ >: ls -l /var/

lrwxrwxrwx    1 root     root             6 Dec 12  2011 cache -> ../tmp

lrwxrwxrwx    1 root     root             6 Dec 12  2011 lock -> ../tmp

lrwxrwxrwx    1 root     root             6 Dec 12  2011 log -> ../tmp

lrwxrwxrwx    1 root     root             6 Dec 12  2011 pcmcia -> ../tmp

lrwxrwxrwx    1 root     root             6 Dec 12  2011 run -> ../tmp

lrwxrwxrwx    1 root     root             6 Dec 12  2011 spool -> ../tmp

lrwxrwxrwx    1 root     root             6 Dec 12  2011 tmp -> ../tmp

WITHOUT THE FOLDER /VAR AND THE  FOLLOWING UP SOFT LINK, DEBUG CONSOLE WILL PRINT CONTENT WHICH SHOULD BE STORE IN THE FILE /TMP/messages

localhost login: [    7.160000] eth0: link up (100/Full)

Jan  1 02:31:51 localhost user.info kernel: [    7.160000] eth0: link up (100/Full)

Jan  1 02:31:58 localhost user.info dropbear[483]: Child connection from 192.168.200.104:2534

Jan  1 02:32:11 localhost user.notice dropbear[483]: password auth succeeded for 'root' from 192.168.200.104:2534

Jan  1 02:32:11 localhost user.warn dropbear[484]: lastlog_perform_login: Couldn't stat /var/log/lastlog: No such file or directory

Jan  1 02:32:11 localhost user.warn dropbear[484]: lastlog_openseek: /var/log/lastlog is not a file or directory!

Jan  1 02:32:11 localhost user.warn dropbear[484]: wtmp_write: problem writing /var/log/wtmp: No such file or directory

HOW TO SHOW PRINTK MSG AUTOMATIC  WHILE DEBUGGING KERNEL SPACE CODE ON EMBEDDED DEVICE WITHOUT CONSOLE CABLE

cat /proc/kmsg

This file is used to hold messages generated by the kernel. These messages are then picked up by other programs, such as /sbin/klogd or /bin/dmesg.