Linux Command references(命令全称，方便记忆)
alias Create your own name for a command
archprint machine architecture
ashash command interpreter (shell)
awk(gawk) pattern scanning and processing language
basenameRemove directory and suffix from a file name
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参考：http://wenku.baidu.com/view/44c2e717866fb84ae45c8db2.html?from=rec&pos=3&weight=5&lastweight=4&count=5
