On 15Feb2013 08:48, Cameron Simpson wrote:
On 13Feb2013 16:03, Suvayu Ali wrote:
| I know about redirection, but was not aware that I could also open
| sockets! Thanks a lot for the nice explanation, I'll read up more.
Unless bash has even more weirdness in it than I thought, the redirection
On 13Feb2013 16:03, Suvayu Ali wrote:
| I know about redirection, but was not aware that I could also open
| sockets! Thanks a lot for the nice explanation, I'll read up more.
Unless bash has even more weirdness in it than I thought, the redirection
is probably relying on a Linuxism to open a po
On 13Feb2013 09:36, James Hogarth wrote:
| > That prints all the existing connections and sockets.
| > -rn prints the routing table.
| >
| and neither has anything to do with the OPs query...
The OP, Suvayu Ali, had as part of his query "or if I have internet
connection ... What can I use as rep
On 13Feb2013 08:02, Patrick O'Callaghan wrote:
| On Wed, 2013-02-13 at 20:31 +1100, Cameron Simpson wrote:
| > On 13Feb2013 01:06, Patrick O'Callaghan wrote:
| > | On Wed, 2013-02-13 at 14:40 +1100, Cameron Simpson wrote:
| > | > If I want to know if I have an internet connection I look for a
| >
On 02/13/2013 10:43 PM, inode0 wrote:
> On Wed, Feb 13, 2013 at 7:57 AM, Ed Greshko wrote:
>> One thing of interest to note but which may not affect what the OP is
>> doing
>>
>> If the port being tested is listed as "filtered" by nmap
>>
>> [egreshko@meimei ~]$ nmap -Pn -p143 imap.gmail.com
Hi John,
On Wed, Feb 13, 2013 at 07:44:56AM -0600, inode0 wrote:
> On Wed, Feb 13, 2013 at 3:12 AM, Suvayu Ali
> wrote:
> > On Tue, Feb 12, 2013 at 08:37:27PM -0600, inode0 wrote:
> >>
> >> Something like this perhaps.
> >>
> >> $ 2>/dev/null >/dev/tcp/imap.gmail.com/993 && sync-my-email.sh
> >
On Wed, Feb 13, 2013 at 02:11:09PM +, Bill Oliver wrote:
> On Wed, 13 Feb 2013, Ed Greshko wrote:
> >On 02/13/2013 06:24 PM, Suvayu Ali wrote:
> >>
> >>Installing anything is out of the question since I do not have admin
> >>rights in any of these other machines.
> >>
> >>I guess checking for i
On Wed, Feb 13, 2013 at 7:57 AM, Ed Greshko wrote:
> One thing of interest to note but which may not affect what the OP is
> doing
>
> If the port being tested is listed as "filtered" by nmap
>
> [egreshko@meimei ~]$ nmap -Pn -p143 imap.gmail.com
>
> Starting Nmap 6.01 ( http://nmap.org ) at
I'm a little hesitant to chime in, since I screwed up last time, but
that brings up a question. In reading this thread, my first thought was
"Well, if this guy wants GNU netcat, why not just download GNU netcat?"
Just for giggles, I dowloaded and compiled it from sourceforge, and it
seems to wo
On 02/13/2013 09:57 PM, Ed Greshko wrote:
> will hang for quite some time
Forgot to add
The same holds true if the host is down.
--
Don't be bullied by the judgmental grammar and spelling police.
--
users mailing list
users@lists.fedoraproject.org
To unsubscribe or change subscription
On 02/13/2013 09:44 PM, inode0 wrote:
> On Wed, Feb 13, 2013 at 3:12 AM, Suvayu Ali
> wrote:
>> Hi John,
>>
>> On Tue, Feb 12, 2013 at 08:37:27PM -0600, inode0 wrote:
>>> Something like this perhaps.
>>>
>>> $ 2>/dev/null >/dev/tcp/imap.gmail.com/993 && sync-my-email.sh
>> This works, but I don't
On Wed, Feb 13, 2013 at 3:12 AM, Suvayu Ali wrote:
> Hi John,
>
> On Tue, Feb 12, 2013 at 08:37:27PM -0600, inode0 wrote:
>>
>> Something like this perhaps.
>>
>> $ 2>/dev/null >/dev/tcp/imap.gmail.com/993 && sync-my-email.sh
>
> This works, but I don't think I understand it. Could you please
> e
On Wed, 2013-02-13 at 20:31 +1100, Cameron Simpson wrote:
> On 13Feb2013 01:06, Patrick O'Callaghan wrote:
> | On Wed, 2013-02-13 at 14:40 +1100, Cameron Simpson wrote:
> | > If I want to know if I have an internet connection I look for a
> | > default
> | > route in the output of "netstat -an", t
On 02/13/2013 06:24 PM, Suvayu Ali wrote:
> Installing anything is out of the question since I do not have admin
> rights in any of these other machines.
>
> I guess checking for installed packages is the only option left now.
It is *not* out of the question. tcping doesn't need system privileges
On Wed, Feb 13, 2013 at 10:10:47AM +, James Hogarth wrote:
> >
> > I would use tcping too, if it were available on these other systems I
> > expect my scripts to run on.
> >
> > Thanks for spotting my dumb mistake in the parsing.
> >
> >
> >
> Are you sure nmap is on all these systems? It quite
>
> I would use tcping too, if it were available on these other systems I
> expect my scripts to run on.
>
> Thanks for spotting my dumb mistake in the parsing.
>
>
>
Are you sure nmap is on all these systems? It quite often isn't (not a
default package anyway) for security reasons (no need to make
Hi Ed,
On Wed, Feb 13, 2013 at 05:55:53PM +0800, Ed Greshko wrote:
> On 02/13/2013 05:47 PM, James Hogarth wrote:
> >
> I still prefer tcping since there is no need to grep or awk anything.
> Or worry about text being changed in a later release. Just rely on
> exit status.
>
I would use tcping
>
> My point being, grepping for "Host is up" doesn't fill the bill. You're
> saying what I saidjust differently.
>
> I still prefer tcping since there is no need to grep or awk anything. Or
> worry about text being changed in a later release. Just rely on exit
> status.
>
>
>
Ah I agree on
Hi Ed and James,
On Wed, Feb 13, 2013 at 09:45:05AM +, James Hogarth wrote:
> > $ nmap -Pn -p993 imap.gmail.com |& grep -q 'Host is up' && { ... }
> >
> > And of course someday the printed text will change and I'll have to edit
> > my scripts again! Oh well. :-/
> >
>
>
> Host is up woul
On 02/13/2013 05:47 PM, James Hogarth wrote:
>
>
>
> And you still get "Host is up" but, of course, the service you want
> isn't
>
>
> Err read the man page? -Pn assumes the host is up (skips the initial ping in
> case something drops that when you are interested in a port) so it will say
> And you still get "Host is up" but, of course, the service you want
> isn't
>
>
> Err read the man page? -Pn assumes the host is up (skips the initial ping
in case something drops that when you are interested in a port) so it will
say the host is up in that case - but we don't care about the
> $ nmap -Pn -p993 imap.gmail.com |& grep -q 'Host is up' && { ... }
>
> And of course someday the printed text will change and I'll have to edit
> my scripts again! Oh well. :-/
>
Host is up wouldn't be right - you need to parse to see if the port is
listed as open or closed...
Something li
On 02/13/2013 05:37 PM, Suvayu Ali wrote:
> On Wed, Feb 13, 2013 at 10:18:44AM +0100, Suvayu Ali wrote:
>> On Wed, Feb 13, 2013 at 08:45:39AM +, James Hogarth wrote:
>>> The other alternative to tcping is nmap ...
>>>
>>> nmap -Pn -p993 imap.gmail.com
>> I guess switching to nmap might resolve
> Thanks a lot! I had a suspicion the issue was something like this.
> This is extremely inconvenient though, since now I have to change quite
> a few scripts, more importantly now I also have to figure out the
> machine my script is running on (e.g. laptop or institutes servers).
>
> I guess swit
On Wed, Feb 13, 2013 at 10:18:44AM +0100, Suvayu Ali wrote:
> On Wed, Feb 13, 2013 at 08:45:39AM +, James Hogarth wrote:
> >
> > The other alternative to tcping is nmap ...
> >
> > nmap -Pn -p993 imap.gmail.com
>
> I guess switching to nmap might resolve the second issue.
>
This presents a
> That prints all the existing connections and sockets.
> -rn prints the routing table.
>
>
and neither has anything to do with the OPs query...
--
users mailing list
users@lists.fedoraproject.org
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
On 13Feb2013 01:06, Patrick O'Callaghan wrote:
| On Wed, 2013-02-13 at 14:40 +1100, Cameron Simpson wrote:
| > If I want to know if I have an internet connection I look for a
| > default
| > route in the output of "netstat -an", thus:
| >
| > netstat -rn | egrep '\''^(default|0\.0\.0\.0) +[1-9]
Hi James,
On Wed, Feb 13, 2013 at 08:45:39AM +, James Hogarth wrote:
> > Or, will less zeros
> >
> > tcping -t 1 imap.gmail.com 993:-) :-)
> >
> > --
> >
>
> Specifically what's going on here is that fedora netcat is not the old
> netcat you know.
>
> A little while back (I don't re
Hi John,
On Tue, Feb 12, 2013 at 08:37:27PM -0600, inode0 wrote:
>
> Something like this perhaps.
>
> $ 2>/dev/null >/dev/tcp/imap.gmail.com/993 && sync-my-email.sh
This works, but I don't think I understand it. Could you please
explain?
Thanks,
--
Suvayu
Open source is the future. It sets
> Or, will less zeros
>
> tcping -t 1 imap.gmail.com 993:-) :-)
>
> --
>
Specifically what's going on here is that fedora netcat is not the old
netcat you know.
A little while back (I don't remember which release) it was replaced by
nmap netcat (ncat):
[root@server ~]# rpm -qf /usr/bin/
On 02/13/2013 10:51 AM, Ed Greshko wrote:
> tu 100 imap.gmail.com 993 && sync-my-email.sh
Or, will less zeros
tcping -t 1 imap.gmail.com 993:-) :-)
--
Don't be bullied by the judgmental grammar and spelling police.
--
users mailing list
users@lists.fedoraproject.org
To unsubscribe
On Wed, 2013-02-13 at 14:40 +1100, Cameron Simpson wrote:
> If I want to know if I have an internet connection I look for a
> default
> route in the output of "netstat -an", thus:
>
> netstat -rn | egrep '\''^(default|0\.0\.0\.0) +[1-9]'\'' >/dev/null
netstat -an ...
poc
--
users mailing lis
On 13Feb2013 03:21, Suvayu Ali wrote:
| I used to use netcat to check if a particular host is up or if I have
| internet connection before I run a few scripts. [...]
| Any ideas what happened to it? What can I use as replacement?
If I want to know if I have an internet connection I look for a de
On 02/13/2013 10:21 AM, Suvayu Ali wrote:
> Hi,
>
> I used to use netcat to check if a particular host is up or if I have
> internet connection before I run a few scripts. I would use the -z
> option in particular. But now I see that has been removed:
>
> $ nc -z imap.gmail.com 993 && sync-my-e
On Tue, Feb 12, 2013 at 8:21 PM, Suvayu Ali wrote:
> Hi,
>
> I used to use netcat to check if a particular host is up or if I have
> internet connection before I run a few scripts. I would use the -z
> option in particular. But now I see that has been removed:
>
> $ nc -z imap.gmail.com 993 &&
Hi,
I used to use netcat to check if a particular host is up or if I have
internet connection before I run a few scripts. I would use the -z
option in particular. But now I see that has been removed:
$ nc -z imap.gmail.com 993 && sync-my-email.sh
ncat: invalid option -- 'z'
Here is the exc
36 matches
Mail list logo
