ruby用变量执行bash命令

Question

我需要在Ruby脚本中执行Bash命令。 根据Nate Murray和其他一些谷歌来源的“6种方式在Ruby中运行Shell命令”，大约有6种方法可以做到这一点。

print "enter myid: "
myID = gets
myID = myID.downcase
myID = myID.chomp 
print "enter host: "
host = gets
host = host.downcase
host = host.chomp 
print "winexe to host: ",host,"\n"
command = "winexe -U domain\\\\",ID," //",host," \"cmd\""
exec command 

Answer 1

对于它的价值，您可以实际链接这些方法，并且puts将为您打印换行符，因此这可能只是：

print "enter myid: "
myID = STDIN.gets.downcase.chomp

print "enter host: "
host = STDIN.gets.downcase.chomp

puts "winexe to host: #{host}"
command = "winexe -U dmn1\\\\#{myID} //#{host} \"cmd\""
exec command

Answer 2

看起来你的命令字符串放在一起可能有问题。
另外，我不得不直接参考STDIN。

# Minimal changes to get it working:
print "enter myid: "

myID = STDIN.gets
myID = myID.downcase
myID = myID.chomp

print "enter host: "
host = STDIN.gets
host = host.downcase
host = host.chomp 

print "winexe to host: ",host,"\n"
command = "echo winexe -U dmn1\\\\#{myID} //#{host} \"cmd\""
exec command

紧凑版：

print "enter myid: "
myID = STDIN.gets.downcase.chomp

print "enter host: "
host = STDIN.gets.downcase.chomp

puts "winexe to host: #{host}"
exec "echo winexe -U dmn1\\\\#{myID} //#{host} \"cmd\""

最后两行printf样式：

puts "winexe to host: %s" % host
exec "echo winexe -U dmn1\\\\%s //%s \"cmd\"" % [myID, host]

最后两行加上字符串连接：

puts "winexe to host: " + host
exec "echo winexe -U dmn1\\\\" + myID + " //" + host + " \"cmd\""

最后两行带有C ++样式的行追加：

puts "winexe to host: " << host
exec "echo winexe -U dmn1\\\\" << myID << " //" << host << " \"cmd\""