19. 08. 09

CentOS 5, VAIO and Wireless

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I own a Sony VAIO laptop on which I dual boot either Windows XP or CentOS 5 (Linux Kernel). I always wanted to get wireless networking to work but, the plain and simple truth is that although the core components for wireless activities are present, there are vital applications missing which allow a user to connect wirelessly in a similar manner to Windows. So the hunt began. Now I'm not one to beat around the bush so here's what I found (that worked for me). My model of laptop uses the Intel 3945ABG wireless adapter and although CentOS appears to identify it, I always got the message whenever I tried to activate the device: Error for wireless request "Set Encode" (8B2A): SET failed on device wlan0; Invalid argument. SIOCSIFFLAGS: No such file or directory Failed to bring up wlan0. After sifting through huge amounts of postings to forums about all the tweaks and options other people had tried and failed with, I found this article, that pointed out that CentOS 5 (and for that matter RHEL 5) simply doesn't have all the required tools to make it work. Here's an outline of what you need to do: 1) Add Dag Wieers repo from HERE. Chose your flavour from the list. Download the file to the root directory and extract all files. 2) yum install dkms-ipw3945 3) chkconfig --level 345 NetworkManager on chkconfig --level 345 NetworkManagerDispatcher on 4) Reboot You will now have an icon in your system tray from which you can simply configure your wireless connections.
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In: linux, networkAuthor: EditorComments (4)
13. 08. 09

CentOS5 update problem solved

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Running transaction check ---> Package libxml2.i386 0:2.6.26-2.1.2.8 set to be updated ---> Package xulrunner.i386 0:1.9.0.12-1.el5 set to be updated ---> Package libxml2-python.i386 0:2.6.26-2.1.2.8 set to be updated ---> Package libtiff.i386 0:3.8.2-7.el5_3.4 set to be updated ---> Package apr.i386 0:1.2.7-11.el5_3.1 set to be updated ---> Package bind-utils.i386 30:9.3.4-10.P1.el5_3.3 set to be updated ---> Package kernel.i686 0:2.6.18-128.4.1.el5 set to be installed ---> Package nss.i386 0:3.12.3.99.3-1.el5.centos.2 set to be updated ---> Package apr-util.i386 0:1.2.7-7.el5_3.2 set to be updated ---> Package tomcat5-servlet-2.4-api.i386 0:5.5.23-0jpp.7.el5_3.2 set to be updated ---> Package bind-libs.i386 30:9.3.4-10.P1.el5_3.3 set to be updated ---> Package tomcat5-jsp-2.0-api.i386 0:5.5.23-0jpp.7.el5_3.2 set to be updated ---> Package python.i386 0:2.4.3-24.el5_3.6 set to be updated ---> Package nss-tools.i386 0:3.12.3.99.3-1.el5.centos.2 set to be updated ---> Package kernel-headers.i386 0:2.6.18-128.4.1.el5 set to be updated ---> Package nspr.i386 0:4.7.4-1.el5_3.1 set to be updated ---> Package firefox.i386 0:3.0.12-1.el5.centos set to be updated Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 229, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 145, in main (result, resultmsgs) = base.buildTransaction() File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 647, in buildTransaction (rescode, restring) = self.resolveDeps() File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 704, in resolveDeps for po, dep in self._checkFileRequires(): File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 939, in _checkFileRequires if not self.tsInfo.getOldProvides(filename) and not self.tsInfo.getNewProvides(filename): File "/usr/lib/python2.4/site-packages/yum/transactioninfo.py", line 414, in getNewProvides for pkg, hits in self.pkgSack.getProvides(name, flag, version).iteritems(): File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 300, in getProvides return self._computeAggregateDictResult("getProvides", name, flags, version) File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 470, in _computeAggregateDictResult sackResult = apply(method, args) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 861, in getProvides return self._search("provides", name, flags, version) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 43, in newFunc return func(*args, **kwargs) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 837, in _search for pkg in self.searchFiles(name, strict=True): File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 43, in newFunc return func(*args, **kwargs) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 586, in searchFiles self._sql_pkgKey2po(rep, cur, pkgs) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 470, in _sql_pkgKey2po pkg = self._packageByKey(repo, ob['pkgKey']) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 413, in _packageByKey po = self.pc(repo, cur.fetchone()) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 68, in __init__ self._read_db_obj(db_obj) File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 94, in _read_db_obj setattr(self, item, _share_data(db_obj[item])) TypeError: unsubscriptable object After some searching and checking several suggestions, I found the cause and solution to be very simple. The yum cache had become corrupted. The solution: cd /var/cache/yum rm -rf * yum makecache See below Sponsored Links

That cured it.

yum update then worked perfectly. Many thanks to http://just-another.net.
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In: linuxAuthor: EditorComments (0)