= Introduction =
The QCG-!SimpleClient is a basic client utility used to submit jobs to the QCG-Broker service (a [http://www.qoscosgrid.org QosCosGrid] meta-scheduler). Its job description format (QCG-Script) and command tools syntax were intentionally modelled after local batch systems "look && feel". Thus, the learning effort needed for a new users (that have some experience with local cluster systems) was very limited. The QCG-!SimpleClient allow you to submit MUSCLE job in the coherent way to any single PL-Grid site. Unfortunately current version of QCG-Script do not support description of more advance experiments like co-allocated (cross-cluster) simulations, workflows or parameter sweep. You need to use [[QCG-AdvancedClient]] instead.

= User Interface Machine =
Every cluster in PL-Grid can be accessed from the QCG UI machine: qcg.man.poznan.pl. You can log in there using your PL-Grid account:
{{{
ssh plg[your-id]@qcg.man.poznan.pl
}}}
= Preparing credentials =
1. Copy your credentials (PKCS12 keystore) to the qcg machine:
{{{
scp plg[your-id].p12 plg[your-id]@qcg.man.poznan.pl:~/
}}}
2. Create `~/.globus` directory
{{{
mkdir ~/.globus
}}}
3. Convert your credentials to the `.pem` format
{{{

$ openssl pkcs12 -nocerts -in usercred.p12 -out ~/.globus/userkey.pem
$ openssl pkcs12 -clcerts -nokeys -in usercred.p12 -out ~/.globus/usercert.pem
$ chmod 644 ~/.globus/usercert.pem
$ chmod 400 ~/.globus/userkey.pem
}}}

== Further reading ==
 * [http://apps.man.poznan.pl/trac/muscle/raw-attachment/wiki/QCG-SimpleClient/QCG-SimpleClient-CheatSheet.pdf QCG-SimpleClient Cheet Sheet Card]