Lantronix SCS1620 Guia do Utilizador descarregar pdf (Página 101)

SCSxx05/SCSxx20 User Guide 8: Commands

8-14

Using Single Signon to Save Time

To automate and save time, try this:

[max@miraclehut ~]$ ssh-agent /bin/bash

[max@miraclehut max]$ ssh-add

Need passphrase for /home/max/.ssh/identity (max@miraclehut).

Enter passphrase:

Identity added: /home/max/.ssh/identity (max@miraclehut)

[max@miraclehut max]$ for target_host in host1 host2 host3

host4 host5 host[678] host9; do

> ssh root@$target_host "./tripwire --initialize"

> ssh root@$target_host "echo \"This host protected by

Tripwire\" >> /etc/motd"

> done

This process allows me to type in my passphrase once, and then run two commands, on

nine hosts, without having to type any more passphrases. I can walk away now, content

that I don't have to manually start Tripwire on each of the nine hosts. I can use more "for"

loops now, since I don't have to re-enter my passphrase again until I exit out of the bash

shell! This saves tons of time, without the insecurity of rsh or rlogin's rhost authentication.

Mounting File Systems During Boot

You can configure the SCS to mount a file system at boot time. Configure this

feature from the bash shell as the root user. To access the bash shell as root

user:

1. Log in as sysadmin. The command-line prompt displays.

2. Type bash to start a shell process (notice: sysadmin level = $).

3. su (switch user) to root level; enter the existing root password (default =

root). After the system accepts the password, notice that the root level =

sysadmin@ # (e.g., [root@SCS1620 /var/tmp]#?)

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Lantronix SCS1620 Guia do Utilizador Página 101