log-files

Alternatives to Splunk?

Note : This is all regarding Linux and free software, as that’s what I mostly use, but you should be fine with a syslog client on Windows to send the logs to a Linux syslog server. Logging to an SQL server: With only ~30 machines, you should be fine with pretty much any centralised syslog-alike … Read more

Where is my mysql log on OS X?

As Chealion mentioned, there are several ways that your mysql could have been installed. Each of which will place your data dir and/or logs in different locations. The following command will give you (and us) a good indication of where to look. ps auxww|grep [m]ysqld # Putting brackets around the first char is a `grep`+`ps` … Read more

How can I fully log all bash scripts actions?

I generally put something similar to the following at the beginning of every script (especially if it’ll run as a daemon): #!/bin/bash exec 3>&1 4>&2 trap ‘exec 2>&4 1>&3’ 0 1 2 3 exec 1>log.out 2>&1 # Everything below will go to the file ‘log.out’: Explanation: exec 3>&1 4>&2 Saves file descriptors so they can … Read more

For what is the “.well-known”-folder?

That /.well-known/ subdirectory is defined by RFC 5785 RFC 8615 It is increasingly common for Web-based protocols to require the discovery of policy or other information about a host (“site-wide metadata”) before making a request. For example, the Robots Exclusion Protocol http://www.robotstxt.org/ specifies a way for automated processes to obtain permission to access resources; likewise, … Read more

My /var/log/btmp file is huge! What should I do?

This means people are trying to brute-force your passwords (common on any public-facing server). It shouldn’t cause any harm to clear out this file. One way to reduce this is to change the port for SSH from 22 to something arbitrary. For some additional security, DenyHosts can block login attempts after a certain number of … Read more