对连接的设备的命令行输出进行排序

Question

im working with PHP on my Raspberry PI, and im trying to find a file on a USB drive, this will be in a cron job for every minute...

The file has a name that i will know every time (settings.txt) and i have the required output to figure out what drives i have.. Now i cant figure out how to sort them...

Im writing them all to a text file but they are not spaced with on every line and not with \t between them... how is it possible to get the value of "Mounted On" ?

Output:

Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/root        3648564 3479396    152784  96% /
devtmpfs          469756       0    469756   0% /dev
tmpfs             474060     452    473608   1% /dev/shm
tmpfs             474060    6928    467132   2% /run
tmpfs               5120       4      5116   1% /run/lock
tmpfs             474060       0    474060   0% /sys/fs/cgroup
/dev/mmcblk0p1     65480   20256     45224  31% /boot
tmpfs              94812      48     94764   1% /run/user/1000
/dev/sda1       15625744 5330752  10294992  35% /media/kristian/D81C-745F

Device info: OS: Ubuntu Mate 15.** PHP: 5.6

Answer 1

I'd use awk for this. It splits by space by default. For my Mac it was $9 and for one of my Centos boxes it's $6. Just depends on which column your value is. Looks like it's a $6.

df  | awk '{print $6}'                                                                       

Mounted
/
/tmp
/usr/local
/var
/dev
/Volumes/MobileBackups
/Volumes/AppCode
/Volumes/LaCie