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Full Discussion: How to create symlink for latest file only?
Top Forums Shell Programming and Scripting How to create symlink for latest file only? Post 303034132 by solaris_1977 on Friday 19th of April 2019 03:03:07 AM
Old 04-19-2019
May be I missed to copy correct content. Here I tried it again. I made two attemps. One job created for 23:58 and another time at 00:01
Code:
-bash-3.2# crontab -l | tail -2
58 23 * * * cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
01 00 * * * cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
-bash-3.2#
-bash-3.2# tail -f  /var/cron/log
<  root 28826 c Thu Apr 18 16:13:00 2019 rc=2
>  CMD: unlink /var/log/apache/error_log
>  root 29897 c Thu Apr 18 16:14:00 2019
<  root 29897 c Thu Apr 18 16:14:00 2019 rc=255
>  CMD:  cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
>  root 26545 c Thu Apr 18 23:58:00 2019
<  root 26545 c Thu Apr 18 23:58:00 2019 rc=2
>  CMD: cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
>  root 3093 c Fri Apr 19 00:01:00 2019
<  root 3093 c Fri Apr 19 00:01:00 2019 rc=2
^C
-bash-3.2# ls -l /var/log/apache/error_log
/var/log/apache/error_log: No such file or directory
-bash-3.2#

But if I run command manually, it is able to create
Code:
-bash-3.2# cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
-bash-3.2# ls -l /var/log/apache/error_log
lrwxrwxrwx   1 root     root          18 Apr 19 00:03 /var/log/apache/error_log -> error_log.20190419
-bash-3.2# rm -f error_log
-bash-3.2#

To test, if cron is working with root, I made another entry of date command
Code:
32 00 * * * date>/tmp/date.out

-bash-3.2# tail -f  /var/cron/log
<  root 20623 c Fri Apr 19 00:20:22 2019
>  CMD: date > /tmp/date.out
>  root 10651 c Fri Apr 19 00:26:00 2019
<  root 10651 c Fri Apr 19 00:26:00 2019
>  CMD: cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
>  root 12318 c Fri Apr 19 00:27:00 2019
<  root 12318 c Fri Apr 19 00:27:00 2019 rc=2
>  CMD: cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
>  root 13871 c Fri Apr 19 00:28:00 2019
<  root 13871 c Fri Apr 19 00:28:00 2019 rc=2
>  CMD: cd /var/log/apache && rm -f error_log && ln -s $(ls -r *error_log.* | head -1) error_log
>  root 23263 c Fri Apr 19 00:31:00 2019
<  root 23263 c Fri Apr 19 00:31:00 2019 rc=2
>  CMD: date>/tmp/date.out
>  root 25056 c Fri Apr 19 00:32:00 2019
<  root 25056 c Fri Apr 19 00:32:00 2019
^C
You have new mail in /var/mail/root
-bash-3.2# ls -l /tmp/date.out
-rw-r--r--   1 root     root          29 Apr 19 00:32 /tmp/date.out
-bash-3.2#

Not sure if "rc=2" is giving some indication
Last edited by solaris_1977; 04-19-2019 at 05:49 AM..
 

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LEARN ABOUT OPENSOLARIS

apache

apache(1M)						  System Administration Commands						apache(1M)

NAME

       apache - Apache hypertext transfer protocol server overview

DESCRIPTION

       apache  consists  of  a main server daemon, loadable server modules, some additional support utilities, configuration files, and documenta-
       tion.

FILES

       The apache HTTPD server is integrated with Solaris.

       The following files specify the installation locations for apache:

       /etc/apache	      Contains server configuration files.

			      A newly-installed server must be manually configured before use. Typically this involves copying	httpd.conf-example
			      to the httpd.conf file and making local configuration adjustments.

       /usr/apache/bin	      Contains the httpd executable as well as other utility programs.

       /usr/apache/htdocs     Contains the Apache manual in HTML format. This documentation is accessible by way of a link on the server test page
			      that gets installed upon fresh installation.

       /usr/apache/include    Contains the Apache header files, which are needed for building various optional server extensions with apxs(8)

       /usr/apache/jserv      Contains documention for the mod_jserv java servlet module. Documention can be read with a  web  browser	using  the
			      url:

				file:/usr/apache/jserv/docs/index.html

       /usr/apache/libexec    Contains	loadable modules (DSOs) supplied with the server. Any modules which are added using apxs(8)are also copied
			      into this directory.

       /usr/apache/man	      Contains man pages for the server, utility programs, and mod_perl.

			      Add this directory to your MANPATH to read the Apache man pages. See NOTES.

       /usr/apache/perl5      Contains the modules and library files used by the mod_perl extension to Apache.

       /var/apache/cgi-bin    Default location for the CGI scripts.

			      This can be changed by altering the httpd.conf file and restarting the server.

       /var/apache/htdocs     Default document root.

			      This can be changed by altering the httpd.conf file and restarting the server.

       /var/apache/icons      Icons used by the server.

			      This normally shouldn't need to be changed.

       /var/apache/logs       Contains server log files.

			      The formats, names, and locations of the files in this directory can be altered by various configuration	directives
			      in the httpd.conf file.

       /var/apache/proxy      Directory used to cache pages if the caching feature of mod_proxy is enabled in the httpd.conf file.

			      The location of the cache can also be changed by changing the proxy configuration in the httpd.conf file.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWapchr 		   |
       +-----------------------------+-----------------------------+
       |			     |SUNWapchu 		   |
       +-----------------------------+-----------------------------+
       |			     |SUNWapchd 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

       http://www.apache.org

NOTES

       In addition to the documentation and man pages included with Solaris, more information is available at http://www.apache.org

       The  Apache  man pages are provided with the programming modules. To view the manual pages for the Apache modules with the man command, add
       /usr/apache/man to the MANPATH environment variable. See man(1) for more information. Running catman(1M) on the Apache manual pages is  not
       supported.

SunOS 5.11							    8 Aug 2000								apache(1M)
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