HPUX: vxfs fsadm: attempt to resize {} failed with errno 28

Error number 28 means ENOSPC from /usr/include/sys/errno.h
#define ENOSPC          28      /* No space left on device      */


Why is the ENOSPC error while running fsadm even though there is enough free space on the filesystem?

Solution:

NOTE: If a file system is full, busy or too fragmented, the resize operation may fails.

HPUX : stty: : Not a typewriter

If you see the message "stty: : Not a typewriter" while login to the server using SSH.

If means the PTS is exhausted and you have increase the value to PTS.

kmtune -q npty
Parameter             Current Dyn Planned                    Module     Version
===============================================================================
npty                       60  -  60

Linux Dmesg: kernel: Your time source seems to be instable or some driver is hogging interupts

If the Liunx Machine Demsg says:

syslog-ng[5244]: STATS: dropped 0

kernel: warning: many lost ticks.

kernel: Your time source seems to be instable or some driver is hogging interupts

kernel: rip __do_softirq+0x4a/0xd2

Solution:

When network load is very high or time source is instable, these messages will be logged.

If NTP is synchronized to NTP server, these messages can be ignored.

What NTP Command Says?

“+” – Good and a preferred remote peer or server (included by the combine algorithm)

“*” – The remote peer or server presently used as the primary reference;

poll : NTP polls each peer every “poll” seconds.

when : is relative time of last poll.

reach : track of last successful polls, 377 is best.

Delay : is network delay, this is fine

offset : offset between local and peer clock (ms) and it should be low.

jitter : Mean deviation (jitter) in the time reported for that remote peer or server.