EFI
by Patrick Dupre
Hello,
I have a disk where I wish to have 2 OS on 2 different partitions
Do I need 2 EFI System Partition (Boot). I guess that one is enough.
I just want to be sure.
Thank.
===========================================================================
Patrick DUPRÉ | | email: pdupre(a)gmx.com
Laboratoire de Physico-Chimie de l'Atmosphère | |
Université du Littoral-Côte d'Opale | |
Tel. (33)-(0)3 28 23 76 12 | | Fax: 03 28 65 82 44
189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===========================================================================
5 years, 9 months
Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?
by Turritopsis Dohrnii Teo En Ming
Good evening from Singapore,
I am torn between deploying Microsoft Exchange 2016 and Linux-based
SMTP servers like sendmail, postfix, qmail and exim.
Relative ease of installation and configuration is an important
consideration factor.
Microsoft Exchange 2016, Domain Controller, and Active Directory are
relatively easy to install and configure. Linux-based SMTP servers are
extremely difficult to install and configure and of course, extremely
time-consuming.
One of the features of Microsoft Exchange 2016 is that you can create
additional folders on your Inbox in the server (server-side). Can
Linux-based SMTP servers do that?
Does Exchange 2016 offer more user-friendly features or Linux-based
SMTP servers?
Besides the above considerations, how about security? Traditionally,
Linux is far more secure than Windows.
Judging by security, Linux-based SMTP servers ought to have a higher percentage of the market share?
Finally, I can only use Windows Server 2016 Standard Evaluation Copy FREE for a period of 3 years MAXIMUM. But I can use Linux servers and Mail Transport Agents (MTA) FREE perpetually.
Please advise.
Thank you very much.
===BEGIN SIGNATURE===
Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
[1] https://tdtemcerts.wordpress.com/
<https://tdtemcerts.wordpress.com/>[2] http://tdtemcerts.blogspot.sg/
<http://tdtemcerts.blogspot.sg/>[3] https://www.scribd.com/user/270125049/Teo-En-Ming
<https://www.scribd.com/user/270125049/Teo-En-Ming>===END SIGNATURE===
5 years, 9 months
lost nfs mount -
by Bob Goodwin
I had a power interruption this morning, everything is on UPS's but we
are raising a new puppy who gets into everythingit seems.
I have all the usual connections through my LAN but can not mount the
NFS4 server, /can ssh and sftp to it. //I/'ve tried what I can think of,
it doesn't seem to be a firewall or selinux problem. it has worked well
until the power failure. I think something is corrupted in the server
... I have a similar server running Samba which connects and runs as usual.
I could use some suggestions of where to look next.
Bob
--
Bob Goodwin - Zuni, Virginia, USA
http://www.qrz.com/db/W2BOD
box10 FEDORA-27/64bit LINUX XFCE Fastmail POP3
5 years, 9 months
dnf: can i "tag" installed packages so i can remove them later?
by Robert P. J. Day
scanned the dnf man page, did not see an immediate solution so i'll
ask here:
is there any way to dynamically tag or label packages during dnf
install so i can remove them all later by that tag or label? on more
than one occasion, i've had to install dozens (or hundreds) of
packages, *knowing* that i would need them only for a while, at which
time it would be nice to be able to remove them all via that tag or
label.
i guess i'm after something i would think of as a "dynamic group",
where i could run, say:
$ sudo dnf install --tag="my_project" docker
$ sudo dnf install --tag="my_project" erlang
and possibly other totally unrelated packages, then toss them all
later with:
$ sudo dnf remove --tag="new_project"
is there anything like this? (and, yes, i can appreciate the
possibility for conflicts when an initially "tagged" package would
later be installed explicitly, and so on.)
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca/dokuwiki
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
========================================================================
r
5 years, 9 months
Considering Asus Prime Z370-A; need video recommendations
by Alex
Hi,
I'm considering purchasing an Asus Prime Z370-A motherboard with an
i7-8700 processor for my new desktop. I plan on running fedora
exclusively with a few kvm virtual machines running fedora and win10.
I'm looking for recommendations for video controllers. It says it
supports NVIDIA 2-way SLI and AMD 3-way CrossFireX, but I'm not even
sure that I understand what that means. It also has 2xPCIe 3.0 x16
slots.
I believe the open source support for NVIDIA is better than for AMD
these days, correct?
I have about $300 to spend on a video controller. Recommendations on
specific controllers that work well with Fedora would be appreciated.
Thanks,
Alex
5 years, 9 months
dnf wierdness
by Neal Becker
sudo dnf --enablerepo=updates-testing update kernel
...
Dependencies resolved.
Problem: cannot install both kernel-4.17.6-200.fc28.x86_64 and
kernel-4.17.6-200.fc28.x86_64
- cannot install the best update candidate for package
kernel-4.17.6-200.fc28.x86_64
- cannot install the best update candidate for package
kernel-4.17.3-200.fc28.x86_64
====================================================================================================
Package Arch Version
Repository Size
====================================================================================================
Reinstalling:
kernel x86_64 4.17.6-200.fc28 updates-
testing 96 k
Transaction Summary
====================================================================================================
Total download size: 96 k
Is this ok [y/N]: n
Operation aborted.
[nbecker@nbecker2 scma-ofdm-nr]$ rpm -q kernel
kernel-4.17.3-200.fc28.x86_64
kernel-4.17.5-200.fc28.x86_64
kernel-4.17.6-200.fc28.x86_64
Am I blind or is there something strange here?
5 years, 9 months
F28 Wifi sends auth, authenticates,
then association to AP rejected temporarily - bz 1599036
by Chris Tatman
Has anyone run across an issue where their wireless with F28 cannot associate and get an IP from certain Access Points? I ran across the same behaviour reported in the following bug yesterday when trying to use the wifi connection in a vacation rental:
https://bugzilla.redhat.com/show_bug.cgi?id=1599036
Wifi does not work on home connection with Intel Corporation Wireless 7260 with F28
System logs indicate that the wifi device is authentiacting, then for some reason the connection gets dropped by the AP:
------------
88.580417] wlp3s0: deauthenticating from 88:cc:45:03:61:55 by local choice (Reason: 1=UNSPECIFIED)
[ 88.604566] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 90.436415] wlp3s0: authenticate with 88:cc:45:03:61:55
[ 90.438575] wlp3s0: send auth to 88:cc:45:03:61:55 (try 1/3)
[ 90.441887] wlp3s0: authenticated
[ 90.442817] wlp3s0: associate with 88:cc:45:03:61:55 (try 1/3)
[ 90.446632] wlp3s0: RX AssocResp from 88:cc:45:03:61:55 (capab=0x1411 status=30 aid=1)
[ 90.446635] wlp3s0: 88:cc:45:03:61:55 rejected association temporarily; comeback duration 672203520 TU (1141637 ms)
------------------
In my testing, I can associate with the router in my vacation rental if I disable encryption. But as soon as I re-enable ANY type of wpa security, I am no longer able to keep a connection and these same errors pop up in the logs again. Like the reporter of the bug, I am able to start up a hotspot on my android phone with wpa encryption, and I can succesfully connect to it. Could the Access Point itself be doing something 'weird' in the way that it enables WPA encryption?
I have not tried testing with WEP encryption yet.
Thanks!
5 years, 9 months
Strange message on ssh login
by Richard Shaw
I've never seen additional output before but when I remoted in to my F28
desktop I got the following:
Using username "<user>".
<user>@<host>'s password:
Activate the web console with: systemctl enable --now cockpit.socket
Last login: Sun Jul 1 09:26:49 2018
What's up with that?
Thanks,
Richard
5 years, 9 months
F28 suspend to ram bounce
by Robert Moskowitz
I have seen this for some time (perhaps since install) on F28. I
suspend to ram and the system seems to suspend then immediately restarts
by itself. I unlock and suspend again and this 2nd attempt 'takes'.
It seems this happens one the 1st suspend after a powerup and login. I
don't believe I see it on later suspends.
LOTS of log messages I will provide a few. Trying to find some of the
failure to suspend
...
Jul 16 10:41:10 lx121e systemd[1]: Reached target Sleep.
Jul 16 10:41:10 lx121e systemd[1]: Starting Suspend...
Jul 16 10:41:11 lx121e systemd-sleep[3896]: Suspending system...
Jul 16 10:41:11 lx121e kernel: PM: suspend entry (deep)
Jul 16 10:41:11 lx121e kernel: PM: Syncing filesystems ... done.
Jul 16 10:41:11 lx121e nm-dispatcher[3879]: req:2 'down' [wlp4s0]: start
running ordered scripts...
Jul 16 10:41:11 lx121e chronyd[611]: Source 107.155.72.138 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 193.225.118.163 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 2001:470:28:140::5 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 206.108.0.131 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 62.149.0.30 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 80.65.85.94 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 198.206.133.14 offline
Jul 16 10:41:11 lx121e chronyd[611]: Can't synchronise: no selectable
sources
Jul 16 10:41:18 lx121e kernel: Freezing user space processes ...
(elapsed 0.006 seconds) done.
Jul 16 10:41:18 lx121e kernel: OOM killer disabled.
Jul 16 10:41:18 lx121e kernel: Freezing remaining freezable tasks ...
(elapsed 0.052 seconds) done.
Jul 16 10:41:18 lx121e kernel: Suspending console(s) (use
no_console_suspend to debug)
Jul 16 10:41:18 lx121e kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 16 10:41:18 lx121e kernel: sd 0:0:0:0: [sda] Stopping disk
Jul 16 10:41:18 lx121e kernel: PM: suspend devices took 2.354 seconds
...
Jul 16 10:41:44 lx121e systemd[1]: Reached target Sleep.
Jul 16 10:41:44 lx121e systemd[1]: Starting Suspend...
Jul 16 10:41:44 lx121e systemd-sleep[4194]: Suspending system...
Jul 16 10:41:44 lx121e kernel: PM: suspend entry (deep)
Jul 16 10:41:44 lx121e kernel: PM: Syncing filesystems ... done.
Jul 16 10:41:45 lx121e chronyd[611]: Source 107.155.72.138 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 193.225.118.163 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 198.206.133.14 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 2001:470:28:140::5 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 206.108.0.131 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 62.149.0.30 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 80.65.85.94 offline
...
Jul 16 10:43:28 lx121e kernel: Freezing user space processes ...
(elapsed 0.005 seconds) done.
Jul 16 10:43:28 lx121e kernel: OOM killer disabled.
Jul 16 10:43:28 lx121e kernel: Freezing remaining freezable tasks ...
(elapsed 0.079 seconds) done.
Jul 16 10:43:28 lx121e kernel: Suspending console(s) (use
no_console_suspend to debug)
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Stopping disk
Jul 16 10:43:28 lx121e kernel: PM: suspend devices took 0.805 seconds
...
Jul 16 10:43:28 lx121e kernel: x86: Booting SMP configuration:
Jul 16 10:43:28 lx121e kernel: smpboot: Booting Node 0 Processor 1 APIC 0x1
Jul 16 10:43:28 lx121e kernel: cache: parent cpu1 should not be sleeping
Jul 16 10:43:28 lx121e kernel: microcode: CPU1: patch_level=0x05000029
Jul 16 10:43:28 lx121e kernel: CPU1 is up
Jul 16 10:43:28 lx121e kernel: ACPI: Waking up from system sleep state S3
Jul 16 10:43:28 lx121e kernel: ACPI: EC: interrupt unblocked
...
Jul 16 10:43:28 lx121e kernel: Freezing user space processes ...
(elapsed 0.005 seconds) done.
Jul 16 10:43:28 lx121e kernel: OOM killer disabled.
Jul 16 10:43:28 lx121e kernel: Freezing remaining freezable tasks ...
(elapsed 0.079 seconds) done.
Jul 16 10:43:28 lx121e kernel: Suspending console(s) (use
no_console_suspend to debug)
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Stopping disk
Jul 16 10:43:28 lx121e kernel: PM: suspend devices took 0.805 seconds
Jul 16 10:43:28 lx121e kernel: ACPI: EC: interrupt blocked
Jul 16 10:43:28 lx121e kernel: ACPI: Preparing to enter system sleep
state S3
Jul 16 10:43:28 lx121e kernel: ACPI: EC: event blocked
more messages available upon request.
5 years, 9 months
Timezone question
by Danny Horne
Hi all,
I recently changed my Fedora 28 servers from UTC to Europe/London
timezone, so now it's displaying times in BST (British Summer Time).
Come October this will change to GMT (Greenwich Mean Time).
1) Will the timezone change automatically (account for the hours
difference)?
2) Will rsyslog continue to post log times as BST or will it
automatically change to GMT without having to restart it?
I've also just discovered a weird problem. I have three servers all
configured for Europe/London timezone. Two show times in BST when using
the 'date' command, but one still shows as UTC (see below).
What have I missed?
[root@kepler ~]# date
Tue 17 Jul 11:42:53 BST 2018
[root@kepler ~]#
[root@kepler ~]# timedatectl
Local time: Tue 2018-07-17 11:42:56 BST
Universal time: Tue 2018-07-17 10:42:56 UTC
RTC time: Tue 2018-07-17 10:42:56
Time zone: Europe/London (BST, +0100)
System clock synchronized: yes
systemd-timesyncd.service active: yes
RTC in local TZ: no
[root@hawking log]# date
Tue 17 Jul 10:43:07 UTC 2018
[root@hawking log]#
[root@hawking log]# timedatectl
Local time: Tue 2018-07-17 11:43:10 BST
Universal time: Tue 2018-07-17 10:43:10 UTC
RTC time: Tue 2018-07-17 10:43:10
Time zone: Europe/London (BST, +0100)
System clock synchronized: yes
systemd-timesyncd.service active: yes
RTC in local TZ: no
Thanks for looking
5 years, 9 months
