I have just upgraded to Trusty (this may not be relevant).
I fired up top, and noticed a heap of processes running as root that I had not noticed before. For example:
234 root 39 19 0 0 0 S 0.0 0.0 0:01.86 [?/-1610198336]
235 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 [?/-1610198336]
236 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 [?/-1610198336] `
So I ran the following ps command:
ps axu | grep ?\/ | grep root
which gave the following (redacted) output:
root 234 0.0 0.0 0 0 ? SN 14:38 0:01 [?/-1610198336]
root 235 0.0 0.0 0 0 ? S< 14:38 0:00 [?/-1610198336]
root 236 0.0 0.0 0 0 ? S< 14:38 0:00 [?/-1610198336]
root 239 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 240 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 241 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 242 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 243 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 244 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 245 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 246 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 247 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 248 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 249 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 250 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 251 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-2144731094]
root 252 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 253 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 254 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 255 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 256 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 257 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 258 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 259 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 260 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 261 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 262 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 263 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 264 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 265 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 266 0.0 0.0 0 0 ? SN 14:38 0:00 [?/-1610198336]
root 267 0.0 0.0 0 0 ? SN 14:38 0:00 [?/0]
A lsof doesn't explain much more to me:
sudo lsof -p 423
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
^X/-16101 423 root cwd DIR 8,66 4096 2 /
^X/-16101 423 root rtd DIR 8,66 4096 2 /
^X/-16101 423 root txt unknown /proc/423/exe
Can anyone explain the purpose of these processes?
This is Ubuntu server without x installed.
I am using ZFS, but not as a root file system using the zfs ppa.
Other than the above, this is a very vanilla install.
