MacQueen

chmod
chown
See the output of cron by doing
```
sudo grep CRON /var/log/syslog
```
Count lines in files in current directory
```
find . -type f | xargs cat | wc -l 
```
MTA errors in cron can be solved by installing Postfix aptitude install postfix. Select the Local only configuration.
tail -f /var/mail/<your_username>. do
```
tail -f /var/mail/root
```
to look at cron errors sent to root's email
bash scripts start with #!/bin/sh. If you get errors, you may have leading BOM characters (ef bb bf) in your file. Check this by doing
```
head -n 1 myscript.sh | hexdump -C
```
2>&1 means send stderr to stdout.
redirects stdout to afile.txt.
```
echo test 1> afile.txt
```
To redirect stderr, you do
```
echo test 2> afile.txt
```