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Nov 10

Linux How do i view top two lines of files 


[oracle@siebelts ~]$ head -n 2 /u01/app/oracle/diag/rdbms/crmtest/crmtest/trace/alert_crmtest.log
Wed Dec 07 04:46:19 2011
Starting ORACLE instance (normal)

Nov 10

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Linux common classification of files

Classification of files :

–rw-r–r– 1 oracle oinstall 4626849792 Sep  9 02:56 sibel090912.dmp

‘-‘   –> standard file

drwxrwxr-x 4 oracle oinstall  4096 Dec  7  2011 app

‘d‘  –> directory

crw——- 1 vcsa tty      7, 131 Nov  5 07:30 vcsa3

‘c‘  –> Character device

lrwxrwxrwx 1 root root         13 Nov  5 07:28 MAKEDEV -> /sbin/MAKEDEV

‘l‘  –> Symbloic link

brw-r—– 1 root disk     7,   0 Nov  5 07:28 loop0

‘b‘ –>  block stoarge device i.e. hard disk