mail is an intelligent mail processing system which has a command syntax reminiscent of ed with lines replaced by messages.
mail is part of mailutils package in Debian-Based distros and is a very useful and powerful tool which can be used in scripts.
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While checking the status of packages using dpkg, it is possible to see a ‘rc’ state for some unused packages, this corresponds to:
r: the package was marked for removal
c: the configuration files are currently present in the system
In other words: the package is not completely removed (config files are still present), but not installed anymore (and obviously not used).
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If ProFTPD Project is running in StandAlone mode on Ubuntu Linux, the server could result completely stopped weekly.
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Manage partitions larger than 2 TeraBytes (for example in large storage arrays) was something rare some years ago, now with the Mass-Storage-Devices capacity growing tendency it’s quite frequent to need to set-up a so large FileSystem.
NetFilter IPTables Project Auto-Expiring Rules could be very interesting (for example) to ban IPs for a certain amount of time, and then have then automatically un-banned (by removing Filtering Rule).
IPTables do not provide an integrated solution for that, but a simple combination with the ‘at’ command can do the magic.
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