Rsync is a versatile tool for copying files or whole directory trees locally or over the network to another computer. rsync -a will copy files and ensure most of attributes, ownership and permissions are carried over. Rsync over network is trivial, with SSH as the default network protocol (Rsync can also run in daemon mode).
Often I need to do a rsync -a between hosts on directories I’m not the ... [continue reading]
So, you are stuck in a shell, debugging some random problem. And you have to navigate between two directories, iterating through a debug session - say between a configuration directory like /etc/apache/sites-available and a log directory like /var/log/apache.
Any sane person would open another shell, but in this case you can’t. Or just couldn´t be bothered. So you are stuck in that shell typing in cd /var/log/apache, checking the log-file, then typing in ... [continue reading]
Have you ever had the need to take a rear-view mirror look at your network traffic, for instance for finding out which of your servers were contacted by some remote IP address a week ago? Or to establish whether or not a recently compromised server was able to further distribute its malware? Perhaps you need to find out which single IP address congested your network yesterday evening? How about finding each day’s bandwidth usage for the VoIP telephone system? Has ... [continue reading]
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