Unable to send password and username
Unable to send root and password after telnet. Why?
telnet board
sleep 3
echo -e "rootn"
sleep 1
echo -e "labratn"
login
edited Jan 7 at 13:53
PerlDuck
5,86211333
asked Jan 7 at 13:52
HenryZHenryZ
1
add a comment |
Unable to send root and password after telnet. Why?
telnet board
sleep 3
echo -e "rootn"
sleep 1
echo -e "labratn"
login
edited Jan 7 at 13:53
PerlDuck
5,86211333
asked Jan 7 at 13:52
HenryZHenryZ
1
2
Related: stackoverflow.com/questions/7013137/…, stackoverflow.com/questions/12202587/…
– Melebius
Jan 7 at 13:57
1
You... do know that the way shell script commands are utilized it won't really do anything untiltelnetexits, right? So therefore it's not going to dump your messages into the telnet session properly? Or are you using some other script mechanisms here?
– Thomas Ward♦
Jan 7 at 14:33
add a comment |
Unable to send root and password after telnet. Why?
telnet board
sleep 3
echo -e "rootn"
sleep 1
echo -e "labratn"
login
edited Jan 7 at 13:53
PerlDuck
5,86211333
asked Jan 7 at 13:52
HenryZHenryZ
1
Unable to send root and password after telnet. Why?
telnet board
sleep 3
echo -e "rootn"
sleep 1
echo -e "labratn"
login
login
edited Jan 7 at 13:53
PerlDuck
5,86211333
asked Jan 7 at 13:52
HenryZHenryZ
1
edited Jan 7 at 13:53
PerlDuck
5,86211333
asked Jan 7 at 13:52
HenryZHenryZ
1
edited Jan 7 at 13:53
PerlDuck
5,86211333
edited Jan 7 at 13:53
PerlDuck
5,86211333
edited Jan 7 at 13:53
PerlDuck
5,86211333
5,86211333
asked Jan 7 at 13:52
HenryZHenryZ
1
asked Jan 7 at 13:52
HenryZHenryZ
1
asked Jan 7 at 13:52
HenryZHenryZ
1
1
2
Related: stackoverflow.com/questions/7013137/…, stackoverflow.com/questions/12202587/…
– Melebius
Jan 7 at 13:57
1
You... do know that the way shell script commands are utilized it won't really do anything untiltelnetexits, right? So therefore it's not going to dump your messages into the telnet session properly? Or are you using some other script mechanisms here?
– Thomas Ward♦
Jan 7 at 14:33
add a comment |
2
Related: stackoverflow.com/questions/7013137/…, stackoverflow.com/questions/12202587/…
– Melebius
Jan 7 at 13:57
1
You... do know that the way shell script commands are utilized it won't really do anything untiltelnetexits, right? So therefore it's not going to dump your messages into the telnet session properly? Or are you using some other script mechanisms here?
– Thomas Ward♦
Jan 7 at 14:33
2
2
Related: stackoverflow.com/questions/7013137/…, stackoverflow.com/questions/12202587/…
– Melebius
Jan 7 at 13:57
Related: stackoverflow.com/questions/7013137/…, stackoverflow.com/questions/12202587/…
– Melebius
Jan 7 at 13:57
1
1
You... do know that the way shell script commands are utilized it won't really do anything until
telnet exits, right? So therefore it's not going to dump your messages into the telnet session properly? Or are you using some other script mechanisms here?– Thomas Ward♦
Jan 7 at 14:33
You... do know that the way shell script commands are utilized it won't really do anything until
telnet exits, right? So therefore it's not going to dump your messages into the telnet session properly? Or are you using some other script mechanisms here?– Thomas Ward♦
Jan 7 at 14:33
add a comment |
2 Answers
2
active
oldest
votes
You cannot use a "simple" bash script to interact with a telnet session.
As per @Melebius comment, the answers to this question on StackOverflow propose some solutions, like using expect. As a simpler alternative you can pipe your commands to telnet:
{ sleep 3 ; echo "root" ; sleep 1 ; echo "labrat" ; sleep 1; } | telnet board
Please keep in mind that this way the telnet session terminates soon after the input is processed. If you want to create an automated script, it might be enough (but then expect is still a better way).
EDIT as per comments
If instead you want to open an interactive telnet session, but save yourself the "hassle" of entering username and password every time, I'm afraid there's not a simple solution. You can pass the username via the -l flag (i.e. telnet -l root board) so
you need to enter only the password.
Looks like expect can be used successfully to automate telnet logins while leaving an interactive prompt via the interact directive.
A simple example based would be:
#!/usr/bin/expect
spawn telnet board
sleep .3;
expect "login:"
send "rootr"
expect "password:"
send "labratr";
interact
Just edit to your needs.
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
1
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
add a comment |
I'm not sure if this is the cause of the issue (never used telnet myself), but echo already adds a newline when printing, so echo -e "rootn" will print root then two newlines. You probably want just one, so use echo "root" or printf 'rootn' instead.
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
add a comment |
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2 Answers
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2 Answers
2
active
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active
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active
oldest
votes
You cannot use a "simple" bash script to interact with a telnet session.
As per @Melebius comment, the answers to this question on StackOverflow propose some solutions, like using expect. As a simpler alternative you can pipe your commands to telnet:
{ sleep 3 ; echo "root" ; sleep 1 ; echo "labrat" ; sleep 1; } | telnet board
Please keep in mind that this way the telnet session terminates soon after the input is processed. If you want to create an automated script, it might be enough (but then expect is still a better way).
EDIT as per comments
If instead you want to open an interactive telnet session, but save yourself the "hassle" of entering username and password every time, I'm afraid there's not a simple solution. You can pass the username via the -l flag (i.e. telnet -l root board) so
you need to enter only the password.
Looks like expect can be used successfully to automate telnet logins while leaving an interactive prompt via the interact directive.
A simple example based would be:
#!/usr/bin/expect
spawn telnet board
sleep .3;
expect "login:"
send "rootr"
expect "password:"
send "labratr";
interact
Just edit to your needs.
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
1
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
add a comment |
You cannot use a "simple" bash script to interact with a telnet session.
As per @Melebius comment, the answers to this question on StackOverflow propose some solutions, like using expect. As a simpler alternative you can pipe your commands to telnet:
{ sleep 3 ; echo "root" ; sleep 1 ; echo "labrat" ; sleep 1; } | telnet board
Please keep in mind that this way the telnet session terminates soon after the input is processed. If you want to create an automated script, it might be enough (but then expect is still a better way).
EDIT as per comments
If instead you want to open an interactive telnet session, but save yourself the "hassle" of entering username and password every time, I'm afraid there's not a simple solution. You can pass the username via the -l flag (i.e. telnet -l root board) so
you need to enter only the password.
Looks like expect can be used successfully to automate telnet logins while leaving an interactive prompt via the interact directive.
A simple example based would be:
#!/usr/bin/expect
spawn telnet board
sleep .3;
expect "login:"
send "rootr"
expect "password:"
send "labratr";
interact
Just edit to your needs.
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
1
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
add a comment |
You cannot use a "simple" bash script to interact with a telnet session.
As per @Melebius comment, the answers to this question on StackOverflow propose some solutions, like using expect. As a simpler alternative you can pipe your commands to telnet:
{ sleep 3 ; echo "root" ; sleep 1 ; echo "labrat" ; sleep 1; } | telnet board
Please keep in mind that this way the telnet session terminates soon after the input is processed. If you want to create an automated script, it might be enough (but then expect is still a better way).
EDIT as per comments
If instead you want to open an interactive telnet session, but save yourself the "hassle" of entering username and password every time, I'm afraid there's not a simple solution. You can pass the username via the -l flag (i.e. telnet -l root board) so
you need to enter only the password.
Looks like expect can be used successfully to automate telnet logins while leaving an interactive prompt via the interact directive.
A simple example based would be:
#!/usr/bin/expect
spawn telnet board
sleep .3;
expect "login:"
send "rootr"
expect "password:"
send "labratr";
interact
Just edit to your needs.
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
You cannot use a "simple" bash script to interact with a telnet session.
As per @Melebius comment, the answers to this question on StackOverflow propose some solutions, like using expect. As a simpler alternative you can pipe your commands to telnet:
{ sleep 3 ; echo "root" ; sleep 1 ; echo "labrat" ; sleep 1; } | telnet board
Please keep in mind that this way the telnet session terminates soon after the input is processed. If you want to create an automated script, it might be enough (but then expect is still a better way).
EDIT as per comments
If instead you want to open an interactive telnet session, but save yourself the "hassle" of entering username and password every time, I'm afraid there's not a simple solution. You can pass the username via the -l flag (i.e. telnet -l root board) so
you need to enter only the password.
Looks like expect can be used successfully to automate telnet logins while leaving an interactive prompt via the interact directive.
A simple example based would be:
#!/usr/bin/expect
spawn telnet board
sleep .3;
expect "login:"
send "rootr"
expect "password:"
send "labratr";
interact
Just edit to your needs.
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
edited Jan 8 at 8:16
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
answered Jan 7 at 14:47
Mr ShunzMr Shunz
2,39521922
2,39521922
1
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
add a comment |
1
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
1
1
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
“If instead you want to open an interactive telnet session” Expect seems to be able to work here, too. There are more examples of using SSH (e.g. journaldev.com/1405/expect-script-ssh-example-tutorial) but it should work similarly with Telnet.
– Melebius
Jan 8 at 6:50
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
@Melebius you're right. Never used expect to leave an interactive prompt. Editing my question right now.
– Mr Shunz
Jan 8 at 8:12
add a comment |
I'm not sure if this is the cause of the issue (never used telnet myself), but echo already adds a newline when printing, so echo -e "rootn" will print root then two newlines. You probably want just one, so use echo "root" or printf 'rootn' instead.
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
add a comment |
I'm not sure if this is the cause of the issue (never used telnet myself), but echo already adds a newline when printing, so echo -e "rootn" will print root then two newlines. You probably want just one, so use echo "root" or printf 'rootn' instead.
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
add a comment |
I'm not sure if this is the cause of the issue (never used telnet myself), but echo already adds a newline when printing, so echo -e "rootn" will print root then two newlines. You probably want just one, so use echo "root" or printf 'rootn' instead.
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
I'm not sure if this is the cause of the issue (never used telnet myself), but echo already adds a newline when printing, so echo -e "rootn" will print root then two newlines. You probably want just one, so use echo "root" or printf 'rootn' instead.
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
answered Jan 7 at 14:26
wjandreawjandrea
8,52142260
8,52142260
add a comment |
add a comment |
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2
Related: stackoverflow.com/questions/7013137/…, stackoverflow.com/questions/12202587/…
– Melebius
Jan 7 at 13:57
1
You... do know that the way shell script commands are utilized it won't really do anything until
telnetexits, right? So therefore it's not going to dump your messages into the telnet session properly? Or are you using some other script mechanisms here?– Thomas Ward♦
Jan 7 at 14:33