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Special Forums IP Networking ping can not recognize host but host command can Post 302545947 by programAngel on Wednesday 10th of August 2011 04:38:05 AM
Old 08-10-2011
ping can not recognize host but host command can

Hi,

I have a weird problem.
when ever I do ping command like for example
Code:
ping unix.com

I get the following message:
Code:
[root@localhost ~]# ping unix.com
ping: unknown host unix.com

but when I use host the computer is able to know the host.
Code:
[root@localhost ~]# host unix.com
unix.com has address 81.17.242.186
unix.com mail is handled by 10 aspmx2.googlemail.com.
unix.com mail is handled by 10 aspmx3.googlemail.com.
unix.com mail is handled by 10 aspmx4.googlemail.com.
unix.com mail is handled by 10 aspmx5.googlemail.com.
unix.com mail is handled by 1 aspmx.l.google.com.
unix.com mail is handled by 5 alt1.aspmx.l.google.com.
unix.com mail is handled by 5 alt2.aspmx.l.google.com.

what is the reason?
why the ping can not recognize the host but the host command can?
 

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MBK_WORK_LIB(1) 					     MBK ENVIRONMENT VARIABLES						   MBK_WORK_LIB(1)

NAME
MBK_WORK_LIB - define the mbk working directory SYNOPSYS
c-shell running setenv MBK_WORK_LIB unix path ORIGIN
This software belongs to the ALLIANCE CAD SYSTEM developed by the ASIM team at LIP6 laboratory of Universite Pierre et Marie CURIE, in Paris, France. Web : http://asim.lip6.fr/recherche/alliance/ E-mail : alliance-users@asim.lip6.fr DESCRIPTION
MBK_WORK_LIB sets the directory where are saved the results of an invocation of mbk or genlib. This directory is considered to be, from an mbk point of view, read and write. Also, when a file is searched for reading, the first directory to be looked at is the MBK_WORK_LIB, and then the one defined in MBK_CATA_LIB(1). The unix path argument must be a actually accessible path on your host machine. ERRORS
"mbk_fopen : can't open file 'unix_path/file.xx'" This occurs when either the unix path is irrelevent, or when the file doesn't exist if it is open for reading, or when you don't have the right on the file or directory while trying to write it. EXAMPLE
setenv MBK_WORK_LIB ~fred/crechan/uom SEE ALSO
mbk(3), genlib(1), MBK_CATA_LIB(1). BUG REPORT
This tool is under development at the ASIM department of the LIP6 laboratory. We need your feedback to improve documentation and tools. ASIM
/LIP6 October 1, 1997 MBK_WORK_LIB(1)
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