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bio website serverfault.com
location Montreal, Canada
age 38
visits member for 5 years, 2 months
seen 2 days ago

I am Linux and middleware administrator and seasonal php/python programmer.


2d
comment SSH: Safe for client to host private RSA key?
Well... depends on which end of the needle you are.
Mar
13
comment Firewall throughput
Bandwidth will limit theoretical value of max number of packets per second. The number of PPS will be lower as it will be affected by latencies for storing and forwarding the packet, jitter(if your source is not perfectly in sync with the switch, some packets will get discarded or queued).
Mar
12
comment In a software RAID1, why does tune2fs -c 0 /dev/sda1 not throw an error but change is not seen in tune2fs -l /dev/sda1?
No, the UUID should be different. Could you please add the output of lsblk --output NAME,KNAME,MAJ:MIN,FSTYPE,UUID
Mar
11
comment java installed but not working (dependency issue??)
I think it is a script. Try to see the contents with less, or use file /usr/lib/jvm/jdk1.8.0_40/bin/java
Mar
11
comment java installed but not working (dependency issue??)
you can run ldd /usr/lib/jvm/jdk1.8.0_40/bin/java to see which libraries are linked dynamically and used at startup.
Mar
11
comment Create tar on remote server and send it back over SSH
Please also note that I removed -C in ssh, you do not want gzip compression for data compressed with bzip2.
Mar
11
comment Server crashes with “huge task timeout”
Canonically, the console is the primary terminal where the kernel messages are printed. It could be a serial tty.
Mar
11
comment Server crashes with “huge task timeout”
Access to the console, means the terminal where you can configure the BIOS and see the kernel boot messages.
Mar
10
comment Server crashes with “huge task timeout”
19GB active memory average - I think soon you will need to ad more memory to the VM and to MySQL too.
Mar
10
comment Server crashes with “huge task timeout”
The disk I/O is very low after reboot. I was wondering why is so high before reboot?
Mar
10
comment Server crashes with “huge task timeout”
FS Cache is ok in the Munin graphs
Mar
10
comment Server crashes with “huge task timeout”
The memory graphs of Munin would be interesting then. If you have Disk I/O would be great too.
Mar
10
comment Server crashes with “huge task timeout”
%steal is CPU requested by your VM and not given because another VM was scheduled to run. The higher it is the slower will be your VM.
Mar
10
comment Server crashes with “huge task timeout”
Could you please explain the crashing behavior? Is it a core dump, a kernel panic? Resource starvation? OOM Killer? KVM crash?
Feb
10
comment LVM psychical volume partitions
Those are text files, you can scan the disk and search for them. Also the LVM disklabel has a part in text format that you can search too. Some version of LVM keeps 2 copy of the disk label: one at the beginning of the disk and the other at the end.
Feb
10
comment LVM psychical volume partitions
LVM is storing the history in the /etc/lvm/archive
Jan
31
comment /etc/cron.daily/locate has blank line. File is readonly can't edit
What is the output of lsattr /etc/cron.daily/locate?
Jan
29
comment Debugging a chdir(2) syscall
I am interested in a generic way of determining the access failure. If you see my comments on the question, the original problem is solved.
Jan
22
comment Debugging a chdir(2) syscall
In this particular case it was a file system permission. The folde was owned by root/root and the permissions where 700. Samba user did not have access to that folder. However I am interested in the generic answer.
Jan
22
comment Debugging a chdir(2) syscall
chdir(2) is using path_resolution(7) to verify the permissions. I think is the same as path_walk() in the ftrace output. See: linux.die.net/man/7/path_resolution