Discuss August 2015

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133 participants
126 discussions

sed question
by Jerry Geis 26 Aug '15

26 Aug '15

I am trying to use sed to change a value in a pipe. ------------------- This is the two line script CHANGE="1234" cat my_file.txt | sed 's/CANCELID/$CHANGE/' > cancel.txt ------------------- and the my_file.txt has: <v1:notificationId>CANCELID</v1:notificationId> it gets changed to $CHANGE instead of the actual value 1234 . I tried putting a \ in front of the $ also and made no difference. What am I not doing correctly. Thanks, jerry

6 6

smartctl of usb backup drive
by Robert Moskowitz 25 Aug '15

25 Aug '15

On a headless C7 server (actually a pogoplug with the Redsleeve 7 distro), I have a usb attached backup drive (what other type of drives can you have on a pogoplug other than usb? :) ). I had reformated the partition as ext4: # parted /dev/sdb print Model: WD My Book 1230 (scsi) Disk /dev/sdb: 3001GB Sector size (logical/physical): 4096B/4096B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 3001GB 3001GB primary So I tried smartctl: #smartctl -a /dev/sdb smartctl 6.2 2013-07-26 r3841 [armv5tel-linux-3.8.7-201.fc18.armv5tel.kirkwood] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org /dev/sdb: Unknown USB bridge [0x1058:0x1230 (0x1065)] Please specify device type with the -d option. I looked at the manpage and I don't know how to figure out what usb bridge to specify. BTW, if anyone has an old pogoplug sitting around, I am putting together my cookbook on how to gain control of it and put a c7 build on it. I plan on having it part of a sernet AD domain as the backup file server (2.5W for the pogo and 4-7W for the drive).

2 2

clamav / EXIM on Centos 7
by Gary Stainburn 25 Aug '15

25 Aug '15

Me again, I'm still building my new mail server and I'm struggling getting clamav and exim to talk to each other. I've installed: clamav-server-0.98.7-1.el7.x86_64 clamav-lib-0.98.7-1.el7.x86_64 clamav-0.98.7-1.el7.x86_64 clamav-milter-0.98.7-1.el7.x86_64 clamav-data-0.98.7-1.el7.noarch clamav-update-0.98.7-1.el7.x86_64 clamav-milter-systemd-0.98.7-1.el7.noarch clamav-filesystem-0.98.7-1.el7.noarch exim-mon-4.84-4.el7.x86_64 exim-4.84-4.el7.x86_64 exim-greylist-4.84-4.el7.x86_64 exim-pgsql-4.84-4.el7.x86_64 spamassassin-3.4.0-1.el7.x86_64 I configured EXIM and Spamassassin. I started the services exim spamassassin clamav-milter In EXIM I configured av_scanner = clamd:/var/run/clamd.exim/clamd.sock spamd_address = 127.0.0.1 783 However when I tried to send a test email it failed saying 2015-08-24 22:45:13 1ZTzY6-0002f1-OL malware acl condition: clamd: unable to connect to UNIX socket (/var/run/clamd.exim/clamd.sock): No such file or directory 2015-08-24 22:45:13 1ZTzY6-0002f1-OL H=eddie.ringways.co.uk (gary.ringways.co.uk) [10.1.1.115] F=<gary(a)ringways.co.uk> temporarily rejected after DATA I've checked and clamd.sock doesn't exist. Nor does /etc/clam.conf. /etc/clam.d is empty Results from Google seem to come up with conflicting solutions, but most seem to want to use amavisd which I don't. Are there anywhere simple instructions on just using clamav and EXIM on Centos 7?

2 5

CentOS 6.6 - reshape of RAID 6 is stucked
by Daniel Reich 25 Aug '15

25 Aug '15

Hello I have a CentOS 6.6 Server with 13 disks in a RAID 6. Some weeks ago, i upgraded it to 17 disks, two of them configured as spare. The reshape worked like normal in the beginning. But at 69% it stopped. md2 : active raid6 sdj1[0] sdg1[18](S) sdh1[2] sdi1[5] sdm1[15] sds1[12] sdr1[14] sdk1[9] sdo1[6] sdn1[13] sdl1[8] sdd1[20] sdf1[19] sdq1[16] sdb1[10] sde1[17](S) sdc1[21] 19533803520 blocks super 1.2 level 6, 1024k chunk, algorithm 2 [15/15] [UUUUUUUUUUUUUUU] [=============>.......] reshape = 69.0% (1347861324/1953380352) finish=46103134.8min speed=0K/sec I already tried to stop the raid and start it again, the reshape will start but stop again after some minutes. If I reboot the server, the reshape won't start: md2 : active raid6 sdj1[0] sdg1[18](S) sdh1[2] sdi1[5] sdm1[15] sds1[12] sdr1[14] sdk1[9] sdo1[6] sdn1[13] sdl1[8] sdd1[20] sdf1[19] sdq1[16] sdb1[10] sde1[17](S) sdc1[21] 19533803520 blocks super 1.2 level 6, 1024k chunk, algorithm 2 [15/15] [UUUUUUUUUUUUUUU] resync=PENDING Just if I restart the raid again, it will start the reshape process and stop it like above. In dmesg and messages logs I just found: dmesg md/raid:md2: reshape: not enough stripes. Needed 1024 messages 23:14:56 data kernel: md/raid:md2: not clean -- starting background reconstruction 23:14:56 data kernel: md/raid:md2: reshape will continue 23:14:56 data kernel: md/raid:md2: device sdj1 operational as raid disk 0 23:14:56 data kernel: md/raid:md2: device sdh1 operational as raid disk 2 23:14:56 data kernel: md/raid:md2: device sdi1 operational as raid disk 5 23:14:56 data kernel: md/raid:md2: device sdn1 operational as raid disk 11 23:14:56 data kernel: md/raid:md2: device sds1 operational as raid disk 3 23:14:56 data kernel: md/raid:md2: device sdm1 operational as raid disk 1 23:14:56 data kernel: md/raid:md2: device sdf1 operational as raid disk 14 23:14:56 data kernel: md/raid:md2: device sdd1 operational as raid disk 13 23:14:56 data kernel: md/raid:md2: device sdb1 operational as raid disk 10 23:14:56 data kernel: md/raid:md2: device sdq1 operational as raid disk 7 23:14:56 data kernel: md/raid:md2: device sdr1 operational as raid disk 4 23:14:56 data kernel: md/raid:md2: device sdl1 operational as raid disk 8 23:14:56 data kernel: md/raid:md2: device sdk1 operational as raid disk 9 23:14:56 data kernel: md/raid:md2: device sdc1 operational as raid disk 12 23:14:56 data kernel: md/raid:md2: device sdo1 operational as raid disk 6 23:14:56 data kernel: md/raid:md2: allocated 0kB 23:14:56 data kernel: md/raid:md2: raid level 6 active with 15 out of 15 devices, algorithm 2 23:14:56 data kernel: md2: Warning: Device sdi1 is misaligned 23:14:56 data kernel: md2: detected capacity change from 0 to 20002614804480 23:14:56 data kernel: md2: unknown partition table 23:14:56 data kernel: XFS (md2): Mounting Filesystem 23:14:56 data kernel: md/raid:md2: reshape: not enough stripes. Needed 1024 23:14:56 data kernel: XFS (md2): Ending clean mount So i fixed the stripes: cat /sys/block/md2/md/stripe_cache_size 16384 But the reshape is still not working and the same error still appears in the logs. Have anyone some idea? Regards Daniel

1 0

Cannot print on Centos 6.7
by Gilbert Sebenste 25 Aug '15

25 Aug '15

Hello everyone, I have been scouring the Internet for answers, wikipages, non-Centos pages, and I am stumped. I have a HP LaserJet P4014n. When I plugged it in via USB cable, it found it as a P4014, but in any case, it simply wouldn't print, so I deleted it, and tried to start from scratch. When I manually add the printer, it seems all is well, but it won't print a test page. In my CUPS error_log file, I see: D [21/Aug/2015:11:09:05 -0500] [Job 28] printer-state-message="/usr/lib/cups/backend/lpd failed" D [21/Aug/2015:11:09:05 -0500] [Job 28] printer-state-reasons=paused E [21/Aug/2015:11:11:54 -0500] [CGI] Unable to create avahi client: Resource temporarily unavailable E [21/Aug/2015:11:11:54 -0500] [cups-deviced] PID 20472 (dnssd) stopped with status 1! E [21/Aug/2015:11:13:38 -0500] [CGI] Unable to create avahi client: Resource temporarily unavailable E [21/Aug/2015:11:13:38 -0500] [cups-deviced] PID 21358 (dnssd) stopped with status 1! E [21/Aug/2015:11:14:48 -0500] [CGI] Unable to create avahi client: Resource temporarily unavailable E [21/Aug/2015:11:14:48 -0500] [cups-deviced] PID 22205 (dnssd) stopped with status 1! E [21/Aug/2015:11:16:02 -0500] [CGI] Unable to create avahi client: Resource temporarily unavailable E [21/Aug/2015:11:16:02 -0500] [cups-deviced] PID 23522 (dnssd) stopped with status 1! # lpq HP-LaserJet-P4014 is ready and printing Rank Owner Job File(s) Total Size active root 33 Test Page 1024 bytes But nothing prints. Any ideas? Gilbert ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** *******************************************************************************

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Fedora 9 -> Centos 7 upgrade Dovecot problem
by Gary Stainburn 25 Aug '15

25 Aug '15

Hi all, I'm upgrading my old F9 mail server to Centos 7 and all is going well. However, I've got a problem with recently created users. I've rsync'd /home and /var/spool/mail after moving /etc/passwd and /etc/group I used the default locations on the old F9 server, i.e. mail delivered to /var/spool/mail/%u by EXIM and Dovecot using that as the inbox. Dovecot then used ~/mail/ as it's folder dir. On the new server this works fine for any user where ~/mail/ already exists, but for any user where ~/mail/ does not exist Dovecot fails. I've done some googling and have tried a number of settings, the most popular one being mail_location = mbox:~/:INBOX=/var/spool/mail/%u However, I haven't managed to fix the problem. Anyone know what I need to do next? Below hopefully is enough for someone to see what I've got wrong. They're done with mail_location set to the default, i.e. commented out in 10-mail.conf I've also put the log file up at http://www.stainburn.com/centos.log which should be easier to read. cpage is an established user, tdegg is a new one. As I say below, I have found a work-around but even that still has errors. [root@ollie2 home]# for F in cpage tdegg ; do ls -lad /home/$F /home/$F/* /home/$F/.* /home/$F/* /home/$F/mail/* /home/$F/mail/.* /home/$F/mail/.imap/* /var/spool/mail/$F ; done ls: cannot access /home/cpage/mail/*: No such file or directory drwx------ 5 cpage cpage 125 Mar 31 2009 /home/cpage drwx------ 5 cpage cpage 125 Mar 31 2009 /home/cpage/. drwxr-xr-x. 208 root root 8192 Aug 24 13:27 /home/cpage/.. -rw-r--r-- 1 cpage cpage 18 Feb 29 2008 /home/cpage/.bash_logout -rw-r--r-- 1 cpage cpage 176 Feb 29 2008 /home/cpage/.bash_profile -rw-r--r-- 1 cpage cpage 124 Feb 29 2008 /home/cpage/.bashrc drwxr-xr-x 2 cpage cpage 6 Apr 6 2008 /home/cpage/.gnome2 -rw-r--r-- 1 cpage cpage 120 Mar 31 2009 /home/cpage/.gtkrc drwx------ 3 cpage cpage 18 Mar 31 2009 /home/cpage/mail drwx------ 3 cpage cpage 18 Mar 31 2009 /home/cpage/mail drwx------ 3 cpage cpage 18 Mar 31 2009 /home/cpage/mail/. drwx------ 5 cpage cpage 125 Mar 31 2009 /home/cpage/mail/.. drwx------ 3 cpage cpage 18 Mar 31 2009 /home/cpage/mail/.imap drwx------ 2 cpage cpage 4096 Aug 24 16:21 /home/cpage/mail/.imap/INBOX drwxr-xr-x 4 cpage cpage 37 Nov 20 2008 /home/cpage/.mozilla -rw-r--r-- 1 cpage cpage 658 Mar 31 2009 /home/cpage/.zshrc -rw-rw---- 1 cpage mail 352512344 Aug 24 13:28 /var/spool/mail/cpage ls: cannot access /home/tdegg/*: No such file or directory ls: cannot access /home/tdegg/*: No such file or directory ls: cannot access /home/tdegg/mail/*: No such file or directory ls: cannot access /home/tdegg/mail/.*: No such file or directory ls: cannot access /home/tdegg/mail/.imap/*: No such file or directory drwx------ 4 tdegg tdegg 88 Aug 24 16:17 /home/tdegg drwx------ 4 tdegg tdegg 88 Aug 24 16:17 /home/tdegg/. drwxr-xr-x. 208 root root 8192 Aug 24 13:27 /home/tdegg/.. -rw-r--r-- 1 tdegg tdegg 18 Oct 23 2008 /home/tdegg/.bash_logout -rw-r--r-- 1 tdegg tdegg 176 Oct 23 2008 /home/tdegg/.bash_profile -rw-r--r-- 1 tdegg tdegg 124 Oct 23 2008 /home/tdegg/.bashrc drwxr-xr-x 2 tdegg tdegg 6 Apr 6 2008 /home/tdegg/.gnome2 drwxr-xr-x 4 tdegg tdegg 37 Nov 20 2008 /home/tdegg/.mozilla -rw-rw---- 1 tdegg mail 209466 Jun 10 11:29 /var/spool/mail/tdegg [root@ollie2 home]# [root@ollie2 ~]# telnet 127.0.0.1 110 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. +OK Dovecot ready. user cpage +OK pass ******** +OK Logged in. stat +OK 2812 356812518 quit +OK Logging out. Connection closed by foreign host. [root@ollie2 ~]# telnet 127.0.0.1 110 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. +OK Dovecot ready. user tdegg +OK pass ******** -ERR [SYS/TEMP] Internal error occurred. Refer to server log for more information. Connection closed by foreign host. I have found that if I manually intervene, and issue the following commands, things start to work, although I still get errors. Hopefully I get find out how to fix my Dovecot config so that I don't have to do this every time I set up a new user. [root@ollie2 home]# mkdir -p ~tdegg//mail/.imap/INBOX [root@ollie2 home]# chown -R tdegg:tdegg ~tdegg/mail [root@ollie2 home]# telnet 127.0.0.1 110 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. +OK Dovecot ready. user tdegg +OK pass ******* +OK Logged in. list +OK 19 messages: 1 1099 2 1026 3 1842 4 2053 5 7481 6 25063 7 1275 8 1484 9 19089 10 125054 11 3468 12 3490 13 3490 14 961 15 3177 16 3487 17 3897 18 3895 19 1001 . quit +OK Logging out. Connection closed by foreign host. [root@ollie2 home]# Aug 24 16:42:31 ollie2 dovecot: pop3-login: Login: user=<tdegg>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=130939, secured, session=<K7wxdxAefQB/AAAB> Aug 24 16:42:31 ollie2 dovecot: pop3(tdegg): Error: fchown(/home/tdegg/mail/.imap/INBOX/dovecot.index.log.newlock, group=12 (mail)) failed: Operation not permitted (egid=2046(tdegg), group based on /var/mail/tdegg - see http://wiki2.dovecot.org/Errors/ChgrpNoPerm) Aug 24 16:42:31 ollie2 dovecot: pop3(tdegg): Error: fchown(/home/tdegg/mail/.imap/INBOX/dovecot.index.cache.lock, group=12(mail)) failed: Operation not permitted (egid=2046(tdegg), group based on /var/mail/tdegg - see http://wiki2.dovecot.org/Errors/ChgrpNoPerm) Aug 24 16:42:37 ollie2 dovecot: pop3(tdegg): Disconnected: Logged out top=0/0, retr=0/0, del=0/19, size=212332 -- Gary Stainburn Group I.T. Manager Ringways Garages http://www.ringways.co.uk

2 1

perl-Net-SCP on Centos 7
by Gary Stainburn 25 Aug '15

25 Aug '15

As part of building my new mail server, I'm installing the RPMS to match my old server. However, I can't find a perl-Net-SCP RPM for this version. Can someone point me to where I can get it, preferrably a repo that I can use that has it. I have found perl-Net-SCP-0.08-1.el6.rf.noarch.rpm. As a last resort I could localinstall that. Would it have any nasty side effects? Gary

2 3

[security] Thunderbird vulnerable to MITM
by Alice Wonder 24 Aug '15

24 Aug '15

Thunderbird has a MITM vulnerability with its otherwise rather groovy auto-configuration feature. The problem is that it makes requests via HTTP to retrieve the auto configuration information. This allows a black hat (e.g. the NSA) to modify the results sent to the client, and the client has no way to verify the results have not been tampered with. This could even allow the black hat to act as a proxy for quite some time and the client may never know. This vulnerability is not something that can just be patched without breaking most auto-configuration. I have what I think is a solution to the problem, but I think it needs further review - and it needs someone who actually has the right contacts in the software and hosting worlds to get it implemented. That's not me, I don't really like most people and the feeling tends to be mutual. Anti-social issues aside, I do think this needs to be fixed. https://librelamp.com/FooBird#security has what I think would be the easiest solution while keeping the ability to auto-configure stuff.

3 6

CentOS 7 - Limiting rescue kernel imeges
by Luigi Rosa 24 Aug '15

24 Aug '15

In order to keep only 3 kernel images on a CentOS 7 I edited /etc/yum.conf and I put installonly_limit=3 This parameter works for standard kernel images, but does not work for rescue images: $ ls -al /boot/vmlinuz* -rwxr-xr-x 1 root root 5027376 May 13 20:46 /boot/vmlinuz-0-rescue-2554e2ffad84452bb07401bed0a61089 -rwxr-xr-x 1 root root 3084288 Jun 27 06:42 /boot/vmlinuz-0-rescue-2be43759d5354c5a84125dea5b4a02ab -rwxr-xr-x 1 root root 5029136 Mar 18 05:18 /boot/vmlinuz-0-rescue-3871136569fb49cb934a276af5e09b32 -rwxr-xr-x 1 root root 5029008 Mar 31 19:54 /boot/vmlinuz-0-rescue-ca5579e88a014362836fa90f4aa34248 -rwxr-xr-x 1 root root 5029744 Aug 6 16:31 /boot/vmlinuz-0-rescue-e2ae4db2b909488088e78ac4064661d2 -rwxr-xr-x 1 root root 5029744 Aug 6 03:15 /boot/vmlinuz-3.10.0-229.11.1.el7.x86_64 -rwxr-xr-x 1 root root 5027376 May 13 12:15 /boot/vmlinuz-3.10.0-229.4.2.el7.x86_64 -rwxr-xr-x 1 root root 5029200 Jun 24 00:15 /boot/vmlinuz-3.10.0-229.7.2.el7.x86_64 Is there a way to keep rescue images within a certain limit? Thank you in advance -- Ciao, luigi / +--[Luigi Rosa]-- \ In every revolution, there's one man with a vision. --James Kirk, "Mirror, Mirror"

2 3

Host does not respond to nmap
by Mark LaPierre 24 Aug '15

24 Aug '15

Hey Y'all, I just set up a new old machine on my network. I did a net install of CentOS 6.7 on it replacing an outdated copy of Win XP. Of course I'm now in the throws of configuring the machine to be a useful member of society. [mlapier@peach ~]$ nmap -sn 192.168.15.0/24 Starting Nmap 5.51 ( http://nmap.org ) at 2015-08-23 20:12 EDT Nmap scan report for 192.168.15.1 Host is up (0.00043s latency). Nmap scan report for 192.168.15.100 Host is up (0.00014s latency). Nmap scan report for 192.168.15.101 Host is up (0.00065s latency). Nmap scan report for 192.168.15.104 Host is up (0.00017s latency). Nmap scan report for mushroom.patch (192.168.15.105) Host is up (0.00015s latency). Nmap done: 256 IP addresses (5 hosts up) scanned in 15.30 seconds [mlapier@peach ~]$ ping -c 1 192.168.15.107 PING 192.168.15.107 (192.168.15.107) 56(84) bytes of data. 64 bytes from 192.168.15.107: icmp_seq=1 ttl=64 time=0.175 ms --- 192.168.15.107 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.175/0.175/0.175/0.000 ms [mlapier@peach ~]$ I can ssh onto 192.168.15.107 too. I spent a good part of the day trying to connect the FAHControl on my machine to the Folding@Home client on 192.168.15.107 without success. Maybe the reason why 192.168.15.107 does not appear on the nmap output has something to do with my lack of success connecting the control to the client. Maybe not. I'm not having any problem connecting to the FAH client on 192.168.15.105 from my machine. I even copied the FAH configuration file from 192.168.15.105 to 192.168.15.107 and then restarted the client. Still no joy in Mudville. I figure I should quit while I'm behind. Anyone have any suggestions? -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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Discuss August 2015