Discuss November 2016

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125 participants
96 discussions

Proxy server settings
by paul.greene.va 07 Nov '16

07 Nov '16

Hello All, I'm sure this must be a fairly quick and easy configuration, but I have not been able to figure it out yet. How do you configure the proxy settings in the OS itself (not in a browser or other application) so that anytime the server tries to get out to the internet, that it can direct its traffic to go through a proxy server? I tried putting the proxy settings in .bash_profile per a tech article I found online but that did not work. The OS is Redhat 7.2. Thanks, Paul Greene

2 2

FireFox and Plugins
by Alice Wonder 06 Nov '16

06 Nov '16

While doing a browser fingerprinting survey, I was quite surprised to see I actually have a FireFox plugin installed. The culprit is /usr/lib64/mozilla/plugins/librhythmbox-itms-detection-plugin.so It appears that whoever maintains the rhythmbox RPM has chosen not to package the browser plugin separately like it probably should be. So if I have the rhythmbox RPM installed, I have the plugin. This is rather worrisome because I can find no trace of the plugin in the Mozilla preferences panel, so if it is there it is very well hidden and if it really isn't there, it can't be disabled there. Is there some kind of blacklist file I can put in /usr/lib64/mozilla/plugins/ or ~/.mozilla/plugins/ to specifically tell FireFox not to load that plugin, or do I have to uninstall rhythmbox? Thank you for suggestions. PS does anyone actually have a real world use for an itms detection plugin?

8 17

RHEL 7.3 released
by James Hogarth 06 Nov '16

06 Nov '16

As a heads up RHEL 7.3 is released: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… Pay careful attention when the CR repo starts churning out RPMs (if you have CR enabled) as there have been a few rebases in this - notably firewalld, NetworkManager, freeIPA, libreoffice, samba, amongst others If you have an ipv6 environment ping is now ipv6 aware and ping6 is removed (with a symlink to ping for compatibility). On the SSL side of things pycurl now handles TLS 1.1 and 1.2 and openJDK8 can handle ECC. With the NetworkManager rebase more complicated arbitrary layering of interfaces is possible (eg physical -> team -> vlan -> bridge), which I'll be revisiting my old NM article to investigate soon, and Wi-Fi scanning will use a randomised MAC ... this may affect some people. For a known BSSID the connect won't be a randomised MAC though just when scanning. The firewalld zones become a bit more usable with ipsets being usable to define the zone making management of which networks go in which zones a bit nicer - I'll be revisiting my old firewalld article to investigate this too. The deprecation of the old net-tools suite continues with bridge-utils no longer required in many circumstances as iproute2 gets improved bridge capabilties... this brings EL7 inline with the Fedora behaviour: https://fedoramagazine.org/build-network-bridge-fedora/ On the network side of things be aware of a potentially breaking change to systems in how device names are created, this will only affect systems that have exceptionally long device names: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… For fresh installs using automatic partitioning the default /boot size has been bumped to 1G ... for kickstarts and other automated installs you may want to tweak your setups to match. The NSS bug that caused problems with reusing SSL sessions and was breaking owncloud setups has been resolved - I have not tested this yet and will be doing so this weekend. The impending owncloud 9.1.1 EL7 release in EPEL7 will be removing my workaround and require this for full correct functionality. In the tech preview world nftables joins the testing group (I'll have articles up exploring this new firewalling method in the coming weeks) for networking. Whilst with storage overlayfs and btrfs remain in tech preview status - with cephfs joining them... as notable pieces. There's also new pNFS stuff. This is only a small snippet of things that jumped out relevant to me personally. As always make sure you read through the release notes in full. to be ready once CentOS starts producing the RPMs, and keep in mind this early in the lifecycle there are a fair few rebases and new features implemented that should be tested... unlike later on in the lifecycles (eg EL6) where no/minimal rebasing happens and changes at a feature level don't happen.

12 17

anaconda pgp rpm verification
by Leon Fauster 04 Nov '16

04 Nov '16

Does anaconda verifies gpg signatures to ensure the integrity of the packages? Are the keys already imported or how does anaconda do this job? Any suggestions to improve the integrity while kickstarting a system? Do you use repo_gpgcheck? -- Thanks, LF

1 0

Keyboard layout on remote, local, ... CentOS 6; strange behaviour
by Walter H. 04 Nov '16

04 Nov '16

Hello, I did the following: in /boot/grub/menu.lst I added/replaced KEYTABLE=us-acentos in /etc/sysconfig/keyboard I have this: KEYTABLE="us-acentos" MODEL="pc105" LAYOUT="us" KEYBOARDTYPE="pc" VARIANT="intl" my host system is Windows; and for connecting to Linux terminal I use PuTTY in Windows I have configured German keyboard layout; what would someone expect, when using PuTTY to connect to the above configured CentOS 6 I thought that there I have the US intl layout; but its German; when I switch the keyboard layout in Windows to US intl. and connect to a CentOS 6, where the following is configured in /boot/grub/menu.lst KEYTABLE=de-latin1-nodeadkeys and in /etc/sysconfig/keyboard this: KEYTABLE="de-latin1-nodeadkeys" MODEL="pc105" LAYOUT="de" KEYBOARDTYPE="pc" VARIANT="nodeadkeys" here I thought I have German keyboard layout, but it isn't; it's US in short: why do I have the keyboard layout, which is configured at the host running PuTTY and not which is configured in CentOS? when I log into the Linux directly at the console, I do have the configured keyboard layout; Thanks, Walter

1 0

dnf and failing epel
by lejeczek 04 Nov '16

04 Nov '16

hi everyone, I use dnf but one epel fails in a peculiar way: $ dnf repolist Failed to open: /var/cache/dnf/x86_64/7/x86_64/7/epel/repodata/8415cbb16f52517f34e3edac12a97c9893117f7b9de6cb22fc086048febd1c60-updateinfo.xml.bz2. that file is there, so I tampered with perms & fcontext but to no avail. dnf clean does remove it but on the first contact to epel repo it fails again. Do you see it with your centoses? ps. I wonder if my email get though to the group, I receive mailing list emails but I don't get my own emails? b.w. L

2 4

Fwd: CentOS on new Dell
by Michael B Allen 04 Nov '16

04 Nov '16

On Mon, Oct 24, 2016 at 8:11 PM, Milos Blazevic <milos.blazevic(a)sbb.rs> wrote: > I've seen the thread(s) you started on CentOS mailing list about Dell and ThinkPad > laptops and running Centos on 'em. > > Not sure if you've seen my question, but I'm considering to purchase a laptop, run EL7 on it, and I'm weighing between the Thinkpad and Latitude, so: > > What was it to make you opt for E7470 over, say, Carbon X1? According to RedHat's Hardware compatility list Carbon models are certified, > while none of the Dell's aren't. > > Also, have you given up on CentOS over Fedora? I'd love to hear how's CentOS 7 support for E7470 hardware. Hi Milos, The Thinkpad T series and Latitude are *very* similar computers. They are both business "ultrabooks" with a 1600x1080 display option, nice keyboards (not "chicklet" style), a trackpoint and trackpad and RJ-45 builtin. I bought a Dell Latitude E7470 over the Lenovo for several reasons. One is this comment which is worth mentioning again: On Fri, Sep 30, 2016 at 11:58 PM, Gordon Messmer <gordon.messmer(a)gmail.com> wrote: > It's worth mentioning again that Dell is one of the companies doing the > development for the bits that don't work, and that those drivers are often > the ones that get Lenovo equipment going, too. Lenovo does not, to the best > of my knowledge, do any Linux development. Another reason is that I have heard about people having problems with Lenovo. Not just with software but with hardware malfunctions. I spoke to someone on the phone that had hardware problems with their new Thinkpad (although I suspect some of the problems could have been misdiagnosis by the user). After describing how nice the E7470 they're thinking about dumping their 1yo X250 and getting a Dell. As for the Carbon, that is a very different computer. The Carbon is an ultralight / thin Macbook-like machine with Windows so I have no advice for you there. I have not tried CentOS on the E7470 but I'm quite certain it would not work because I have tried the latest Fedora Live which is about 100 kernel revisions newer and even that doesn't completely work. Specifically, if I plug in an external display it freezes. My feeling is I need a newer display driver (and thus newer kernel). The only other issue I noticed was that wireless didn't work but it seems more like a glue issue and not necessarily a driver. Otherwise, suspend and everything else worked near as I can tell which is actually pretty impressive for a brand new machine. So, I am doing other things while this new E7470 ages like a fine wine. Or maybe I'll loose patience and just install Fedora and try a "vanilla" kernel package. Then maybe after a year or two CentOS 8 or whatever will run on it and then I can just run steady for 4+ years without getting pummeled by stupid updates and feature creep that you get with Fedora and Ubuntu or whatever the latest hot distro is. The E7470 is obviously a laptop of choice for business people. And that is the type of machine developers use. So chances of good compatibility are very high. You just have to give it time. I was watching Daredevil season 1 and they use Latitudes that look exactly like mine. And that was probably filmed in 2014. So the form factor at least has been around for a while which is good. Unfortunately I can't say the same thing about the show. Mike

2 2

CentOS repo issue
by m.roth＠5-cent.us 03 Nov '16

03 Nov '16

I just built these servers, and the other admin added some more packages, then we moved them into the datacenter. I see errors from a cron job, Could not get metalink https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=x86_64 error was 14: curl#6 - "Could not resolve host: mirrors.fedoraproject.org; Unknown error" So I logged on, and ran yum list apcupsd, to see if it was having issues getting epel, and got: Cannot find a valid baseurl for repo: base/7/x86_64 Clues for the poor? mark

4 4

fprintd needed?
by Jon LaBadie 03 Nov '16

03 Nov '16

On a 7.2 desktop system I see irregular attempts to start the fingerprint authentication daemon "fprintd". One of the messages is "D-Bus service launched with name: net.reactivated.Fprint" This fails as there is no fingerprint device. fprintd.service is disabled. Without a fingerprint device, is this software needed. Yum removal (aborted) shows no packages dependent on fprintd. Jon -- Jon H. LaBadie jon(a)jgcomp.com 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (703) 935-6720 (C)

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Centos 7 Minimal and Quotas
by Matt 03 Nov '16

03 Nov '16

I have installed Centos 7 Minimal in a 1TB KVM. Used XFS file system. I did not use LVM. I need to install Directadmin which requires quotas. I have this in fstab: UUID=b482396d-d2fc-49ed-b9df-c49e9387405b / xfs defaults 0 0 UUID=e24a16e0-57ab-42b2-af0b-9edf789376e5 /boot xfs defaults 0 0 UUID=b08b8243-6b46-444c-a7bd-02934246d884 swap swap defaults 0 0 I get this: # repquota / repquota: Mountpoint (or device) / not found or has no quota enabled. repquota: Not all specified mountpoints are using quota. I tried changing / from defaults to defaults,usrquota,grpquota in fstab and rebooting but I still get the same result. What do I need to do here?

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Discuss November 2016