Python调用shell的几种方式

cmd = "some unix command"
retcode = subprocess.call(cmd,shell=True)

ssh = paramiko.SSHClient()
ssh.connect(server, username=username, password=password)
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command(cmd_to_execute)

import commands
command = "nslookup " + node + " | grep Name -1 | grep Address| awk '{print $2}'"
result = commands.getoutput(command)
if (result == ""):
    return "unknown"

sshProcess = subprocess.Popen(['ssh', <remote client>], ,stdin=subprocess.PIPE, stdout = subprocess.PIPE)
sshProcess.stdin.write("ls mydirectory\n")
sshProcess.stdin.write("echo END\n")
for line in stdout.readlines():
    if line == "END\n":
        break
    print(line)
sshProcess.stdin.write("uptime\n")
sshProcess.stdin.write("echo END\n")
for line in stdout.readlines():
    if line == "END\n":
        break
    print(line)