Question: I don't understand why but I can't connect to my school server from my network at home. I'm using login as always like ssh name@host.com but it still don't work.
Here is debug report with -v

```
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: /etc/ssh_config line 102: Applying options for *
debug1: Connecting to merlin.fit.vutbr.cz [147.229.176.19] port 22.
debug1: Connection established.
debug1: identity file /Users/martinpristas/.ssh/id_rsa type -1
debug1: identity file /Users/martinpristas/.ssh/id_rsa-cert type -1
debug1: identity file /Users/martinpristas/.ssh/id_dsa type -1
debug1: identity file /Users/martinpristas/.ssh/id_dsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
ssh_exchange_identification: read: Connection reset by peer

```

Is here any options like network settings or mac settings to fix it ?
Thank you !

Answer: 
You can also do the concatenation within R itself, by setting the column type to string, and then using the paste0(string1, string2) function.
You can use the & sign

```
=A1&C1

```

concatenate does also work in excel

```
=CONCATENATE(A1,C1)

```