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Top Forums Shell Programming and Scripting How to create symlink for latest file only? Post 303034118 by solaris_1977 on Thursday 18th of April 2019 06:33:59 PM
Old 04-18-2019
Quote:
Originally Posted by MadeInGermany
Yes, and ensure a successful cd:
Code:
cd /var/log && ln -s "$(ls -r *error_log.* | head -1)" error_log

BTW ls -r is good here; ls -t would really sort by mtime.
I gave below command in crontab, it executes, but failed with rc-2
Code:
13 16 * * * cd /var/log/apache && ln -s $(ls -r *error_log.* | head -1) error_log
14 16 * * * unlink /var/log/apache/error_log

From /var/cron/log -->

>  CMD: cd /var/log/apache && ln -s $(ls -r *error_log.* | head -1) error_log
>  root 16954 c Thu Apr 18 16:09:00 2019
<  root 16954 c Thu Apr 18 16:09:00 2019 rc=2


Last edited by solaris_1977; 04-18-2019 at 08:15 PM..
 

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explain_symlink_or_die(3)				     Library Functions Manual					 explain_symlink_or_die(3)

NAME
explain_symlink_or_die - make a new name for a file and report errors SYNOPSIS
#include <libexplain/symlink.h> void explain_symlink_or_die(const char *oldpath, const char *newpath); DESCRIPTION
The explain_symlink_or_die function is used to call the symlink(2) system call. On failure an explanation will be printed to stderr, obtained from explain_symlink(3), and then the process terminates by calling exit(EXIT_FAILURE). This function is intended to be used in a fashion similar to the following example: explain_symlink_or_die(oldpath, newpath); oldpath The oldpath, exactly as to be passed to the symlink(2) system call. newpath The newpath, exactly as to be passed to the symlink(2) system call. Returns: This function only returns on success. On failure, prints an explanation and exits. SEE ALSO
symlink(2) make a new name for a file explain_symlink(3) explain symlink(2) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2008 Peter Miller explain_symlink_or_die(3)
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