ksh判断文件是否存在

Unix Korn Shell Scripting Reference Sheet中的一段，关于判断文件是否存在等相关的一些问题-a file exists.-b file exists and is a block special file.-c file exists and is a character special file.-d file exists and is a directory.-e file exists （just the same as -a）.-f file exists and is a regular file.-g file exists and has its setgid（2） bit set.-G file exists and has the same group ID as this process.-k file exists and has its sticky bit set.-L file exists and is a symbolic link.-n string length is not zero.-o Named option is set on.-O file exists and is owned by the user ID of this process.-p file exists and is a first in, first out （FIFO） special file ornamed pipe.-r file exists and is readable by the current process.-s file exists and has a size greater than zero.-S file exists and is a socket.-t file descriptor number fildes is open and associated with aterminal device.-u file exists and has its setuid（2） bit set.-w file exists and is writable by the current process.-x file exists and is executable by the current process.-z string length is zero. 是用 -s 还是用 -f 这个区别是很大的！写shell脚本还是要非常慎重的，很多地方都可能是问题的隐患 #判断index文件是否存在，存在则执行if [ -s indexFile/$TableName.sql ]then sqlplus -s $UserName/$Password@$tns_db @indexFile/$TableName.sql > log/idx$TableName.log 2>&1fiUnix用户新建修改以及环境变量设置总结说明Shell判断一个变量是否为空相关资讯 UNIX

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