我已经阅读了7个不同网站的信息，并阅读了许多有关在Eclipse中安装PyDev的帖子。
每次按照指示运行添加新软件时，我都会遇到以下错误：
Error:
An error occurred while collecting items to be installed
session context was:(profile=PlatformProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,com.python.pydev,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile2898089162481869708.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile2898089162481869708.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.analysis,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile801192414106119940.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile801192414106119940.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.codecompletion,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile6168313931351907508.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile6168313931351907508.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.debug,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile7073699876012619363.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile7073699876012619363.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.fastparser,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile4159291415077654942.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile4159291415077654942.jar
Problems downloading artifact: osgi.bundle,com.python.pydev.refactoring,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile5274455020976568652.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile5274455020976568652.jar
Problems downloading artifact: osgi.bundle,org.python.pydev,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile4062120571797614987.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile4062120571797614987.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.ast,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile1894338590812591599.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile1894338590812591599.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.core,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile7632037949878964195.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile7632037949878964195.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.customizations,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile3154135008542135846.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile3154135008542135846.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.debug,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile8956545440967332177.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile8956545440967332177.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.django,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile8187482656751816692.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile8187482656751816692.jar
Problems downloading artifact: org.eclipse.update.feature,org.python.pydev.feature,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile1603347679097356963.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile1603347679097356963.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.help,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile6428936156364707912.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile6428936156364707912.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.jython,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile6661494086671818853.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile6661494086671818853.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.parser,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile8160203079001172934.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile8160203079001172934.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.refactoring,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile907264170518945675.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile907264170518945675.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.shared_core,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile3871130954619307455.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile3871130954619307455.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.shared_interactive_console,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile4556002555923476904.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile4556002555923476904.jar
Problems downloading artifact: osgi.bundle,org.python.pydev.shared_ui,3.3.3.201401272249.
Error reading signed content:/tmp/signatureFile8166172504257201044.jar
An error occurred while processing the signatures for the file: /tmp/signatureFile8166172504257201044.jar
我该如何修复这个问题？