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Full Discussion: Truncate Log files
Top Forums Shell Programming and Scripting Truncate Log files Post 302371439 by Scott on Saturday 14th of November 2009 06:21:07 PM
Old 11-14-2009
Hi.

Sed on Solaris doesn't support -i - that's far too modern! Come to think of it, I don't think any / many UNIX's support it. And --help doesn't work either.

Perhaps you could use the original solution, but use cp instead of mv:
Code:
tail -b number_of_ blocks_to_save /var/adm/messages > /var/tmp/messages  
cp /var/tmp/messages /var/adm/messages && rm /var/tmp/messages

(the file will retain its inode number and permissions, unlike with mv)

Or truncate the file using
Code:
> /var/adm/messages

 

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utmpx(4)							   File Formats 							  utmpx(4)

NAME
utmpx, wtmpx - utmpx and wtmpx database entry formats SYNOPSIS
#include <utmpx.h> /var/adm/utmpx /var/adm/wtmpx DESCRIPTION
The utmpx and wtmpx files are extended database files that have superseded the obsolete utmp and wtmp database files. The utmpx database contains user access and accounting information for commands such as who(1), write(1), and login(1). The wtmpx database contains the history of user access and accounting information for the utmpx database. USAGE
Applications should not access these databases directly, but should use the functions described on the getutxent(3C) manual page to inter- act with the utmpx and wtmpx databases to ensure that they are maintained consistently. FILES
/var/adm/utmpx user access and adminstration information /var/adm/wtmpx history of user access and adminstrative information SEE ALSO
getutxent(3C), wait(3C)wait.h(3HEAD) SunOS 5.10 22 Feb 1999 utmpx(4)
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