strace: Invalid process id: '-e'

I get the following error when running the `logger.sh`

```
$ bash logger.sh
# Start stracing
strace: Invalid process id: '-e'
```

To my knowledge the `www-data` user is correct, as is `apache2`

Here's some info that may help:

```
$ pgrep -u www-data apache2
$ echo $?
1
```

```
$ ps aux | grep apache
www-data 1068 0.7 2.4 426620 99024 ? S 13:04 0:19 /usr/sbin/apache2 -k start
www-data 1069 0.5 1.5 392388 64388 ? S 13:04 0:15 /usr/sbin/apache2 -k start
www-data 1070 0.6 1.3 383628 55544 ? S 13:04 0:17 /usr/sbin/apache2 -k start
www-data 4552 0.4 1.3 383884 55468 ? S 13:44 0:01 /usr/sbin/apache2 -k start
www-data 4735 0.9 1.3 383844 55332 ? S 13:46 0:01 /usr/sbin/apache2 -k start
root 4910 0.0 0.0 10464 932 pts/0 S+ 13:48 0:00 grep --color=auto apache
www-data 24443 0.7 2.2 419536 90732 ? S 11:17 1:05 /usr/sbin/apache2 -k start
www-data 24525 0.6 2.5 429700 101824 ? S 11:18 1:00 /usr/sbin/apache2 -k start
www-data 28859 0.7 2.4 429200 100376 ? S 12:10 0:44 /usr/sbin/apache2 -k start
www-data 30930 0.6 1.5 392640 64608 ? S 12:35 0:29 /usr/sbin/apache2 -k start
www-data 30932 0.6 1.6 394812 65984 ? S 12:35 0:28 /usr/sbin/apache2 -k start
root 31377 0.0 0.4 342392 16500 ? Ss Aug27 1:09 /usr/sbin/apache2 -k start
```

Start by running logger.sh and reading the strace invocation and process lookup around the reported error. Compare the arguments passed to strace with the apache2 process IDs shown by ps; done means the script traces the intended processes without treating '-e' as a process ID.

Written by the indexing model from the issue text.