handling processes in bash

Laurent Perrinet

Give detailed information on all python processes:
```
ps -fp $(pgrep -d, -x python)
```

Make all python processes run nicer so that they do not obstruct other processes / users:
```
renice 14 `pgrep python`
```
listing processes in the current bash session:
```
jobs -l
```
stopping all python processes :
```
pkill -s STOP python
```
resuming all python processes ( to test ... ) :
```
pkill -s CONT python
```