介绍bash和tcsh,tcsh是在csh基础上扩展的，具有和C语言类似的句法。bash则是LINUX各版本的默认SHELL，而且，在写脚本方面更方便。两者不兼容，bash 有更多的优势，从这个意义上说，如果没有特殊需要，最好从一开始就用bash， 而不用tcsh。-Introduction bash and tcsh, tcsh csh is based on the expansion, with a C like syntax. bash is the default SHELL LINUX versions, but, in terms of more convenient to write the scr ipt. The two are not compatible, bash has more advantages, in this sense, if there is no special need, the best　the outset with a bash, rather than tcsh.