java.io.IOException：无法运行程序“plink”：CreateProcess error=2，系统找不到指定的文件

Question

I am executing a command in my doPost() method of Servlet Class which runs on Tomcat.

The command is :

plink -pw **** username@hostname tail -1000 /temp/info.txt

The command runs fine when I run it on my windows console but when executed inside servlet it throws this error.

java.io.IOException: Cannot run program "plink": CreateProcess error=2, The system cannot find the file specified

I tried executing the command through Runtime.getRuntime().exec(command) as well as through

ProcessBuilder pb = new ProcessBuilder("plink", "-pw", "***","username@hostname","tail","-1000","/temp/info.txt")

Answer 1

A user's environment is typically not in effect when a program is run via certain intermediary actors since a shell's PATH is set in .bashrc, to be executed anew with each new shell.

So, a Java process, for instance, doesn't even run a shell, hence a search in PATH's directories isn't made.

Use full pathnames for programs run via Process on this and via remote execution services on another system.

Answer 2

需要给出plink的完整路径，像这样C:\\Program Files\\PuTTY\\plink.exe -pw **** username@hostname tail -1000 /temp/info.txt