File Question

[Akvino]

I installed MySQL on FedoraC5 and was following some simple instructions regarding PHP - MySQL setup.

What bothers me is this -

I ran:

/# find . -name mysqld -print

to get the result

./usr/libexec/mysqld
./var/run/mysqld
./var/lock/subsys/mysqld
./etc/rc.d/init.d/mysqld


Now for the love of god, can someone tell me what is the role of each mysqld file on each of those locations????? And why are there 4 locations in use for mysqld?

[anomie]

I wouldn't let it bother you too much.

• /usr/libexec/mysqld - Not sure, maybe the binary itself (although I would think that would be some place like /usr/bin or /usr/local/bin).
• /var/run/mysqld - Read man 7 hier for a description of /var/run.
• /var/lock/subsys/mysqld - Read man 7 hier for a description of /var/lock.
• /etc/rc.d/init.d/mysqld - Init script for mysqld.

[Akvino]

I wouldn't let it bother you too much.

• /usr/libexec/mysqld - Not sure, maybe the binary itself (although I would think that would be some place like /usr/bin or /usr/local/bin).
• /var/run/mysqld - Read man 7 hier for a description of /var/run.
• /var/lock/subsys/mysqld - Read man 7 hier for a description of /var/lock.
• /etc/rc.d/init.d/mysqld - Init script for mysqld.

I looked up man 7 heir - no lock or run subfolder description, just for var - multi-purpose log, temporary, transient, and spool files

[anomie]

Weird.

Well, here are the entries from my CentOS box then:

/var/lock
Lock files are placed in this directory. The naming convention
for device lock files is LCK..<device> where <device> is the
device's name in the filesystem. The format used is that of
HDU UUCP lock files, i.e. lock files contain a PID as a 10-byte
ASCII decimal number, followed by a newline character.

/var/run
Run-time variable files, like files holding process identifiers
(PIDs) and logged user information (utmp). Files in this
directory are usually cleared when the system boots.