Rijie的Linux学习笔记

最近在研究适合低配置电脑的Mini Linux，我手头有一台P2 233+128M+8.4G配置的“破”电脑，想寻找适合其运行的Linux系统，需要Xwin、浏览网页、中文支持、文字处理等最基本操作。

众所周知，现在主流的Linux发行版比如Ubuntu、Federa等对于旧电脑来说也是非常庞大的系统，低配硬件不足以支持其运行Xwin等，所以我把目光转向了Mini Linux，选择对象有Puppy、Deli、slitaz。

经过初步考察发现三者均能很好的适应低配置硬件，但是Deli已经停止开发一段时间了，slitaz对于中文支持不是很好，所以仅剩下Puppy了。

我在以后会发布一些关于使用Puppy的经验与大家分享。

近日在运行系统更新命令yum update时候出现了如下错误提示：
Component: pirut
Summary: TBe8ae967a sqlitesack.py:94:_read_db_obj:TypeError: unsubscriptable object

Traceback (most recent call last):
  File “/usr/sbin/pup”, line 407, in _apply
    output = self.applyChanges(self.mainwin)
  File “/usr/lib/python2.4/site-packages/pirut/__init__.py”, line 813, in applyChanges
    self.checkDeps(mainwin)
  File “/usr/lib/python2.4/site-packages/pirut/__init__.py”, line 550, in checkDeps
    (result, msgs) = self.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

Local variables in innermost frame:
item: name
db_obj: None

这个问题是由于yum的原数据损坏导致的，需要先删除原数据和数据库缓存，然后重建，问题即可解决
解决方法，依次运行以下命令：

yum clean metadata
yum clean dbcache
yum makecache