Discuss January 2016

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132 participants
122 discussions

Folding At Home
by Mark LaPierre 02 Feb '16

02 Feb '16

Hey Y'all, I have the Stanford University Folding At Home project running on three of my machines. I had them all set up so that I could control them all from my main machine, 192.168.15.101, but some time ago something changed so that I can no longer connect to the FAH clients on the other two machines. I figured it wasn't really important so I would look into it later. Well time has passed and my Christmas break is almost passed too to I guess this is the time to figure it out. I can still SSH onto both machines. I can ping both machines. When I open the FAH Control on my machine connection to clients running on 192.168.15.105 and 192.168.15.107 fails. I'm assuming that there would be an entry in a log on those two machines detailing the failed connection attempt. What log file should I be looking at? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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C7 and hplip
by Alessandro Baggi 31 Jan '16

31 Jan '16

Hi list, I've a printer model HP ENVY 5530 (AIO) configured in wifi. I've configured this printer on my C7(1511) workstation using hplip and cups. Printer is installed e configured. After installation I try to send a test print page and it is printed. After reboot, I try to print other doc, and I got it printed only on grey-scale and if I try to send another test print page from hplip or cups I obtain a gray-scale print and half page with wrong size (like if the "image" is printed on A3). If I remove printer and re-add it, the test page output mode is color but after a reboot it come back to gray-scale mode but in configuration is selected color. hplip version is 3.13.7. Can someone point me in the right direction? thanks in advance.

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CentOS7 changes strike again.
by Rob Kampen 30 Jan '16

30 Jan '16

Still in the process of migrating from an old CentOS5 server to a brand new CentOS7. After finally getting Virtualbox-5.0 installed and a new Wondoze10 Pro installed it became time to shift the data from the old server to the new. The old server is headless and I installed the old WindozeXP into the Virtualbox4.x via the command line. To do some of the admin I needed to attach to the windoze via a gui and used rdesktop via an ssh tunnel of port 3389. This "just worked" with my old CentOS6 laptop and workstations. So now I try to connect to the old server via my laptop also running a recent CentOS7 install using rdesktop - no joy. the ssh command is >ssh servername -L 3389:127.0.0.1:3389 and then also from my laptop rdesktop -a 16 -N 127.0.0.1:3389 -u rkampen -p- only to get ERROR: Failed to open display: various google searches offer suggestions prepending DISPLAY=:0.0 gives Xlib: connection to ":0.0" refused by server Xlib: No protocol specified ERROR: Failed to open display: :0.0 tried setting selinux to permissive mode - still no joy. All this just worked with my old CentOS6 laptop and work station, however I no longer have access to that. I guess there have been some "improvements" with the advent of gnome3 that now prevent this from working, however my knowledge of how this rdesktop interacts with the local display manager are sketchy at best. Any suggestions from those of you that understand this stuff way better than I do? TIA Rob

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7.2: Problem with upgrade and pdns
by Kai Bojens 30 Jan '16

30 Jan '16

Hello everybody, I just wanted to upgrade my system and stepped over the following error: --> Finished Dependency Resolution Error: Package: pdns-3.4.7-1.el7.x86_64 (@epel) Requires: libmbedtls.so.9()(64bit) Removing: mbedtls-1.3.14-1.el7.x86_64 (@epel) libmbedtls.so.9()(64bit) Updated By: mbedtls-2.2.1-1.el7.x86_64 (epel) ~libmbedtls.so.10()(64bit) Error: Package: pdns-tools-3.4.7-1.el7.x86_64 (@epel) Requires: libmbedtls.so.9()(64bit) Removing: mbedtls-1.3.14-1.el7.x86_64 (@epel) libmbedtls.so.9()(64bit) Updated By: mbedtls-2.2.1-1.el7.x86_64 (epel) ~libmbedtls.so.10()(64bit) You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest Am I the only one with this problem? Any suggestions before I try the proposed solutions?

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man and man-db inconsitency
by david 30 Jan '16

30 Jan '16

Folks I use "yum list installed" to determine if a package has been installed. In particular, I was interested in the "man" program, installed with the command "yum install man". In Centos6, if I look at the results, I see that "man" was installed. This is good. In Centos7, if I look at the results, I see that "man-db" was installed. This is inconsistent. The result is that the generic algorithm: if I want package X , check the "yum list installed" output. If X is not listed, install it, otherwise assume it's already installed. Is there a reason for this inconsistency? The above algorithm works with most other packages. David

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Where did network setup goes under setup utility in CentOS 7?
by reynierpm＠gmail.com 29 Jan '16

29 Jan '16

In CentOS 6.7 I ran setup command and I could configure network settings from that "gui" utility at command line. In CentOS 7 I don't know where this goes or how to enabled. I have installed a few packages: yum install setuptool -y \ && yum install system-config-network-tui -y \ && yum install system-config-firewall* -y \ && yum install system-config-securitylevel-tui -y \ && yum install system-config-keyboard -y \ && yum install ntsysv -y But I can't see the network settings, see this pic: http://content.screencast.com/users/ReynierPM/folders/Snagit/media/39e744c6… Should I install any other package?

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Apache doesn't display "It works page" under CentOS 7
by reynierpm＠gmail.com 29 Jan '16

29 Jan '16

I have Apache/2.4.6 installed in a minimal CentOS 7 VM. I am trying to access the default page when Apache is installed by accessing the CentOS IP as http://192.168.3.130 (is a host only interface) but I got "This webpage is not available: ERR_CONNECTION_TIMED_OUT" and I can't find why. I have stopped iptables and then checked: # service iptables status Redirecting to /bin/systemctl status iptables.service ● iptables.service - IPv4 firewall with iptables Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled) Active: inactive (dead) Jan 29 11:22:43 devserver.local systemd[1]: Stopped IPv4 firewall with iptables. isn't running. I have checked the status of Apache: # service httpd status Redirecting to /bin/systemctl status httpd.service ● httpd.service - The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled) Active: active (running) since Fri 2016-01-29 11:16:00 EST; 7min ago Docs: man:httpd(8) man:apachectl(8) Main PID: 18738 (httpd) Status: "Total requests: 0; Current requests/sec: 0; Current traffic: 0 B/sec" CGroup: /system.slice/httpd.service ├─18738 /usr/sbin/httpd -DFOREGROUND ├─18739 /usr/sbin/httpd -DFOREGROUND ├─18740 /usr/sbin/httpd -DFOREGROUND ├─18741 /usr/sbin/httpd -DFOREGROUND ├─18742 /usr/sbin/httpd -DFOREGROUND └─18743 /usr/sbin/httpd -DFOREGROUND Jan 29 11:15:58 devserver.local systemd[1]: Starting The Apache HTTP Server... Jan 29 11:15:59 devserver.local httpd[18738]: AH00557: httpd: apr_sockaddr_info_get() failed for devserver.local Jan 29 11:15:59 devserver.local httpd[18738]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1. Set the 'ServerName' directive globally to suppress this message Jan 29 11:16:00 devserver.local systemd[1]: Started The Apache HTTP Server. it's running. I have checked network status: # ifconfig eno16777728: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.222.133 netmask 255.255.255.0 broadcast 192.168.222.255 inet6 fe80::20c:29ff:fe6f:2b72 prefixlen 64 scopeid 0x20<link> ether 00:0c:29:6f:2b:72 txqueuelen 1000 (Ethernet) RX packets 152628 bytes 225455749 (215.0 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 54931 bytes 3355746 (3.2 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 eno33554952: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.3.130 netmask 255.255.255.0 broadcast 192.168.3.255 inet6 fe80::20c:29ff:fe6f:2b7c prefixlen 64 scopeid 0x20<link> ether 00:0c:29:6f:2b:7c txqueuelen 1000 (Ethernet) RX packets 9655 bytes 702056 (685.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5800 bytes 529054 (516.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 20 bytes 1700 (1.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 20 bytes 1700 (1.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 it's fine. I have ping server from Windows: C:\Users\reynierpm>ping 192.168.3.130 Pinging 192.168.3.130 with 32 bytes of data: Reply from 192.168.3.130: bytes=32 time<1ms TTL=64 Reply from 192.168.3.130: bytes=32 time<1ms TTL=64 Reply from 192.168.3.130: bytes=32 time<1ms TTL=64 Reply from 192.168.3.130: bytes=32 time<1ms TTL=64 Ping statistics for 192.168.3.130: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms it works. So ... what's wrong? What I am missing here?

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SOT: Best strategy for automatize a flow that need user interaction
by reynierpm＠gmail.com 29 Jan '16

29 Jan '16

I am working in a Dockerfile but there is a "secure" MariaDB server script I need to run which is interactive and I don't know how to deal with this. Basically this is the flow I have follow on the script at test environment and is the same I want to achieve in the Dockerfile without user interaction by just answering as you seen on the flow below: # /usr/bin/mysql_secure_installation Enter current password for root (enter for none): [ENTER] // because there is no password OK, successfully used password, moving on... Set root password? [Y/n] n ... skipping. Remove anonymous users? [Y/n] Y ... Success! Disallow root login remotely? [Y/n] n ... skipping. Remove test database and access to it? [Y/n] Y - Dropping test database... ... Success! - Removing privileges on test database... ... Success! Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? [Y/n] Y ... Success! Cleaning up... So I need to write a bash script or something else that could handle this automatically but has not idea, how would you take care of this?

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CentOS 7, 327 kernel still crashing
by m.roth＠5-cent.us 29 Jan '16

29 Jan '16

I've just added the following to the CentOS bugtracker for CentOS-7 0009860. I admit to not being sure if it's the same issue, or a separate one, but this and other Dell servers - I *think* they're all R420's, but I could be wrong, just all do the same thing on boot. ***************** I've just updated a CentOS 7 server to the latest kernel, vmlinuz-3.10.0-327.4.5.el7.x86_64, and the server fails to boot. It has failed on every 327 kernel. Server: Dell R420, 2 Xeons, 124G RAM. >From the rdsosreport.txt, the relevant portion is: [ 3.317974] <servername> systemd[1]: Starting File System Check on /dev/disk// by-label/\x2f... [ 3.320089] <servername> systemd-fsck[590]: Failed to detect device /dev/diskk /by-label// [ 3.320567] <servername> systemd[1]: systemd-fsck-root.service: main process exited, code=exited, status=1/FAILURE [ 3.320972] <servername> systemd[1]: Failed to start File System Check on /dee v/disk/by-label/\x2f. [ 3.321423] <servername> systemd[1]: Dependency failed for /sysroot. [ 3.321872] <servername> systemd[1]: Dependency failed for Initrd Root File SS ystem. [ 3.322335] <servername> systemd[1]: Dependency failed for Reload Configuratii on from the Real Root. [ 3.322802] <servername> systemd[1]: Job initrd-parse-etc.service/start failee d with result 'dependency'. [ 3.323266] <servername> systemd[1]: Triggering OnFailure= dependencies of inn itrd-parse-etc.service. [ 3.323697] <servername> systemd[1]: Job initrd-root-fs.target/start failed ww ith result 'dependency'. 3.323266] <servername> systemd[1]: Triggering OnFailure= dependencies of inn itrd-parse-etc.service. [ 3.323697] <servername> systemd[1]: Job initrd-root-fs.target/start failed ww ith result 'dependency'. [ 3.324161] <servername> systemd[1]: Triggering OnFailure= dependencies of inn itrd-root-fs.target. [ 3.324586] <servername> systemd[1]: Job sysroot.mount/start failed with resuu lt 'dependency'. [ 3.324998] <servername> systemd[1]: Unit systemd-fsck-root.service entered ff ailed state. [ 3.325430] <servername> systemd[1]: systemd-fsck-root.service failed. [ 3.326752] <servername> systemd[1]: Stopped dracut pre-pivot and cleanup hooo And it stops, and drops me into the rdshell. Not that I can mkdir /mnt, and mount /dev/sda1, and /boot is there, and I can mount /dev/sda3, and root is there just fine. mark

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Alternative HTML Editor
by Tim Evans 29 Jan '16

29 Jan '16

I've been using the SeaMonkey built-in HTML editor from the epel repo for CentOS 6.7: $ repoquery -i seamonkey Name : seamonkey Version : 2.39 Release : 1.el6 Architecture: x86_64 Size : 127340745 Packager : Fedora Project Group : Applications/Internet URL : http://www.seamonkey-project.org Repository : epel Summary : Web browser, e-mail, news, IRC client, HTML editor Source : seamonkey-2.39-1.el6.src.rpm This is now dumping core. The latest release, directly from Mozilla (2.9b4), fails with: /usr/local/seamonkey/seamonkey-bin: error while loading shared libraries: libdbus-glib-1.so.2: cannot open shared object file: No such file or directory Recommendations for alternative HTML editors for this system? Thanks. -- Tim Evans | 5 Chestnut Court UNIX System Admin Consulting | Owings Mills, MD 21117 http://www.tkevans.com/ | 443-394-3864 tkevans(a)tkevans.com

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Discuss January 2016