Where can I find error log files?

Question

Where can I find error log files? I need to check them for solving an internal server error shown after installing suPHP.

Answer 1

You can use "lsof" to find open logfiles on your system. lsof just gives you a list of all open files.

Use grep for "log" ... use grep again for "php" (if the filename contains the strings "log" and "php" like in "php_error_log" and you are root user you will find the files without knowing the configuration).

        root@lnx-work:~# lsof |grep log
        ... snip
        gmain     12148 12274       user   13r      REG              252,1    32768     661814 /home/user/.local/share/gvfs-metadata/home-11ab0393.log
        gmain     12148 12274       user   21r      REG              252,1    32768     662622 /home/user/.local/share/gvfs-metadata/root-56222fe2.log
        gvfs-udis 12246             user  mem       REG              252,1    55384     790567 /lib/x86_64-linux-gnu/libsystemd-login.so.0.7.1
==> apache 12333             user  mem       REG              252,1    55384     790367 /var/log/http/php_error_log**
        ... snip 

        root@lnx-work:~# lsof |grep log |grep php 
        **apache 12333             user  mem       REG              252,1    55384     790367 /var/log/http/php_error_log**
        ... snip 

Also see this article on finding open logfiles: Find open logfiles on a linux system