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System Configuration Keeping it Updated in Software Writer upc a in Software System Configuration Keeping it Updated




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System Configuration Keeping it Updated generate, create upca none with software projects Web application framework The only diff UPC A for None erence between the supfiles from the STABLE and CURRENT branch lies in the tag attribute:. *default host =cvsup7.freebsd.org *default base=/var/db *default prefix=/usr *default release=cvs *default delete use-rel-suffix compress src-all tag=.

. As there woul GTIN - 12 for None d be several major changes each time you synchronize your local source repository, it would be a good idea to check the /usr/src/UPDATING file more frequently. There is also a mailing list dedicated to the CURRENT issues where people discuss the latest changes, bug reports, and possible fixes, which is called freebsd-current and is available for subscription at http://lists.freebsd.

org/ mailman/listinfo/freebsd-current...

Ports Collection If you are re Software UPC-A lying on the ports collection (which is discussed in detail in the next chapter) to install the new software and keep the existing software up-to-date, you will need to keep your ports repository updated. There are a number of ways to keep the ports tree updated, of which, the most popular are, updating using cvsup(1) and portsnap(8)..

Tracking Ports Using CVSup t GS1 - 12 for None o keep the ports tree up-to-date is like synchronizing with source tree, with a few minor differences. The first difference is that you need to track ports-* repository (where * is the ports collection names) instead of src-all. And the second difference is that there is only one branch tag for ports collection which is always the HEAD branch.

It means that the ports collection is the same among different releases of FreeBSD. A sample ports supfile is shown as follows:. *default host =cvsup7.freebsd.org *default base=/var/db *default prefix=/usr *default release=cvs *default delete use-rel-suffix compress ports-all tag=.

[ 34 ]. 2 . Running CVSup brings your ports collection located at /usr/ports to the latest available revision. This is shown here:. # csup /etc/c Universal Product Code version A for None vsupfile Connected to cvsup7.freebsd.org Updating collection ports-all/cvs Edit ports/devel/qt4/Makefile Edit ports/mail/thunderbird/Makefile Edit ports/mail/thunderbird/distinfo .

.. Finished successfully.

You can also run csup periodically, using cron to make sure that your ports tree is always up-to-date. For this, you should run csup with appropriate arguments from cron and redirect the output to a log file, for further inspection. The sample cron line that runs csup everyday at 4:30 is shown as follows:.

30 4 * * * root /usr/bin/csup /etc/cvsupfile 2>&1 > /var/log/csup.log The csup upda tes the live /usr/ports directory. Hence, if you have changed anything within the /usr/ports sub tree, your changes will be overwritten by csup..

Portsnap Although-usin g CVSup, to make the ports tree updated, is quite straightforward, some people choose to use the portsnap. The portsnap is a relatively new system for updating the ports tree, securely. It has been included in the FreeBSD"s base system, since FreeBSD 6.

2. Hence, there is no need to install the software from the ports tree. The snapshots from the ports tree are updated every hour.

It is signed to prevent any malicious modifications and can be downloaded using the HTTP protocol. The portsnap has some advantages over the csup, which make life easier for the system administrator. The advantages are listed as follows: All updates are cryptographically signed and are hence secure.

It requires zero configuration, and takes a couple of commands to update the whole ports tree. It is included in the FreeBSD"s base system. No third-party software is required to be installed.

It uses less network and disk I/O resources as compared to the CVSup protocol.. [ 35 ]. System Configuration Keeping it Updated Just like csu upc barcodes for None p, the portsnap updates are incremental, and there is no need to fetch the whole ports tree every time you want to update it. When you run portsnap for the first time, it downloads a compressed copy of a ports tree to /var/db/portsnap. The next time you update the tree, one or more binary diffs of the tree will be downloaded.

. Binary diffs are created using Colin Percival"s bsdiff tool. The bsdiff is the same as the original diff(1) utility, except for the fact that it uses sophisticated algorithms to compare two binary files and creates small binary patch files that can be applied later, using bspatch utility. These tools were created with the intention of providing security patches to the FreeBSD binaries rather than for re-compiling the binaries from the source code.

The freebsd-update(8) utility also uses the same tools to apply security patches to the system"s binaries.. You should fi GS1 - 12 for None rst download the ports tree. To do this, you should run portsnap with the fetch argument as shown here:.
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