Discuss September 2011

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CentOS-announce Digest, Vol 79, Issue 1
by centos-announce-request＠centos.org 02 Sep '11

02 Sep '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2011:1245 Important CentOS 4 i386 httpd - security update (Tru Huynh) 2. CESA-2011:1245 Important CentOS 4 x86_64 httpd - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Thu, 1 Sep 2011 13:41:08 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2011:1245 Important CentOS 4 i386 httpd - security update To: centos-announce(a)centos.org Message-ID: <20110901114108.GA27052(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2011:1245 httpd security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2011-1245.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/httpd-2.0.52-48.ent.centos4.i386.rpm updates/i386/RPMS/httpd-devel-2.0.52-48.ent.centos4.i386.rpm updates/i386/RPMS/httpd-manual-2.0.52-48.ent.centos4.i386.rpm updates/i386/RPMS/httpd-suexec-2.0.52-48.ent.centos4.i386.rpm updates/i386/RPMS/mod_ssl-2.0.52-48.ent.centos4.i386.rpm source: updates/SRPMS/httpd-2.0.52-48.ent.centos4.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update httpd\* Tru -- Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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please help
by Liang Arsalan 02 Sep '11

02 Sep '11

i am a user of windows and use little bit ubuntu my friend told me to use centos for web development i have question that what is features of centos. thank you -- _____Best Regards_____ Buddyexpress Administrator Liang

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Update to CentOS 6.0 without CD/DVD reader
by Timothy Murphy 02 Sep '11

02 Sep '11

I've had a disaster on my home network server; the partition table on the disk containing / has become corrupted, and testdisk has not enabled me to recover the table. If anyone can help with this I should be grateful. However, that is not what I am writing about. I've installed a substitute box - and HP MicroServer - which by a miracle has CentOS-5.6 installed on it. Now I'm wondering what is the best way to install CentOS-6, given that there is no CD/DVD driver on this machine. I have access to the internet, so I can download the CD/DVD . I know I could install through a USB stick; I'm just wondering if there is a more direct route. I should look this up, but I'm rather weary after installing dovecot, httpd, etc, and thought I'd take a short cut by asking you gurus. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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xvfb question
by bcb 02 Sep '11

02 Sep '11

First, I realize this might not be the right group. Please feel free to redirect me :-) I recently upgraded from CentOS 5.6 to 6.0. Since the upgrade, Xvfb will, on occasion, "just stop" (ie the process disappears from the system, as opposed to still being there but not working). I can't find any tracks anywhere that it might have left behind that might be clues as to why it stopped. There's nothing in /var/log that looks promising (nothing in messages or Xorg.0.log). Any other clues about where to look or command line options I should add? Thanks in advance, Bruce

2 1

Managing permissions for web folders
by Ruslan Sivak 02 Sep '11

02 Sep '11

We have a web folder /var/www/somesite that's a root for one of the sites. Apache serves files out of here. It is an svn checkout, so that updates could be done by using svn up. Everything has been going great when I use the root user to update, but now I need to give access to other people to make deployments, and it doesn't seem to be easy to do using regular users. I have created a group called staff and added the new user to it, lets say user1. I ran the following commands to set the permissions find . -type d -exec chmod 2775 \{} \; find . -not -type d -exec chmod 0664 \{} \; chown user1.staff . This allows the user to make deployments. Now comes in user2. User2 is also a member of group staff, so he can also make deployments. We haven't ran into any issues yet, but I believe as long as the files are owned by staff, both users can change the files, no matter which one of them owns it. Now we also need to give apache write access to a folder. Lets say /var/www/somesite/files. There are several options here. - We can add apache to the staff group, but this would give apache access to the whole /var/www/somesite tree. - We can change the group to apache. We will need to add user1 and user2 to the apache group. One of the problems with this is that the users would have access to everything that apache has access to. Another problem is that while user1 can run chmod -R user1.apache files, it will fail if the files are owned by someone else (like user2 or apache). Is there a way to get around this? Am I going about this the wrong way? Russ

2 1

Mirror hosting ideas
by Christopher Hawker 02 Sep '11

02 Sep '11

Hello all, I am interested in personally hosting a mirror for CentOS 5 and 6 (not at home, but in a DC, with the future of going colo whe I have the monetary funds to do so). Would anyone have any recommendations on this and whether or not I should set the cron to use the rsync command or have the rsync command in a batch file and tell cron to execute the batch job. I am thinking the second option, simply out of convenience. Unless anyone can see an issue with this. Thanks guys in advance for your help! :) -- If you have any questions, plese do not hesitate to give me a call on +61 478 241 896. Regards, Christopher Hawker "That which you are seeking, is causing you to seek. Try looking in your software collection, between your CentOS ISO images and your Red Hat Linux Networking tools. It is amazing, the places where things hide." - David Williamson, 1972-2011

2 1

dealing with spoofing
by m.roth＠5-cent.us 02 Sep '11

02 Sep '11

Here's a thought I just thunk, folks: some scum, apparently in eastern Europe, has harvested my email, and is using it in the Reply-To: in its spamming efforts. Now, I realize that some mails go out from noreply, but other than that, is there a good reason why a mailserver would not be configured to send delivery failure to *both* Reply-To and From? mark

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Centos 6, KDE 4: canot manage network
by Michael D. Berger 02 Sep '11

02 Sep '11

In KDE 4, I click: Kickoff > System Settings > Network & Connectivity > Network Settings > Network Settings I get a popup informing me that my system is not supported. (This did not happen before.) I am offered choices. I choose RedHat 6.0 (Is this wrong? I also tried RedHat 9.0.). I select Network Interfaces. I see nothing on the list *** even though I am presently running eth0 and can successfully ping google.com through it.***. Now I set that interface using a GUI just a few days ago. I will say, the GUI looks different. So what's happening? Thanks for your help. Mike.

2 7

No buffer space available - loses network connectivity
by Sherin George 02 Sep '11

02 Sep '11

Hi, I have a centos 5.6 xen vps which loses network connectivity once in a while with following error. ========================================= -bash-3.2# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. ping: sendmsg: No buffer space available ping: sendmsg: No buffer space available ping: sendmsg: No buffer space available ping: sendmsg: No buffer space available ========================================= All my investigation so far led me to believe that it is because skbuff cache getting full. ========================================================================= PROC-SLABINFO skbuff_fclone_cache 227 308 512 7 1 : tunables 54 27 8 : slabdata 44 44 0 skbuff_head_cache 1574 1650 256 15 1 : tunables 120 60 8 : slabdata 110 110 0 SLAB-TOP Active / Total Objects (% used) : 2140910 / 2200115 (97.3%) Active / Total Slabs (% used) : 139160 / 139182 (100.0%) Active / Total Caches (% used) : 88 / 136 (64.7%) Active / Total Size (% used) : 512788.94K / 520252.14K (98.6%) Minimum / Average / Maximum Object : 0.02K / 0.24K / 128.00K OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME 664000 620290 93% 0.09K 16600 40 66400K buffer_head 409950 408396 99% 0.21K 22775 18 91100K dentry_cache 343056 340307 99% 0.08K 7147 48 28588K selinux_inode_security 338590 336756 99% 0.74K 67718 5 270872K ext3_inode_cache 143665 143363 99% 0.06K 2435 59 9740K size-64 99540 99407 99% 0.25K 6636 15 26544K size-256 96450 96447 99% 0.12K 3215 30 12860K size-128 60858 60858 100% 0.52K 8694 7 34776K radix_tree_node 12420 11088 89% 0.16K 540 23 2160K vm_area_struct 5895 4185 70% 0.25K 393 15 1572K filp 4816 3355 69% 0.03K 43 112 172K size-32 2904 2810 96% 0.09K 66 44 264K sysfs_dir_cache 2058 1937 94% 0.58K 343 6 1372K proc_inode_cache 1728 1215 70% 0.02K 12 144 48K anon_vma 1650 1590 96% 0.25K 110 15 440K skbuff_head_cache 1498 1493 99% 2.00K 749 2 2996K size-2048 1050 1032 98% 0.55K 150 7 600K inode_cache 792 767 96% 1.00K 198 4 792K size-1024 649 298 45% 0.06K 11 59 44K pid 600 227 37% 0.09K 15 40 60K journal_head 590 298 50% 0.06K 10 59 40K delayacct_cache 496 424 85% 0.50K 62 8 248K size-512 413 156 37% 0.06K 7 59 28K fs_cache 404 44 10% 0.02K 2 202 8K biovec-1 390 293 75% 0.12K 13 30 52K bio 327 327 100% 4.00K 327 1 1308K size-4096 320 190 59% 0.38K 32 10 128K ip_dst_cache 308 227 73% 0.50K 44 7 176K skbuff_fclone_cache 258 247 95% 0.62K 43 6 172K sock_inode_cache 254 254 100% 1.84K 127 2 508K task_struct 252 225 89% 0.81K 28 9 224K signal_cache 240 203 84% 0.73K 48 5 192K shmem_inode_cache 204 204 100% 2.06K 68 3 544K sighand_cache 202 4 1% 0.02K 1 202 4K revoke_table 195 194 99% 0.75K 39 5 156K UDP 159 77 48% 0.07K 3 53 12K eventpoll_pwq 145 139 95% 0.75K 29 5 116K files_cache 144 41 28% 0.02K 1 144 4K journal_handle 140 140 100% 0.88K 35 4 140K mm_struct 140 77 55% 0.19K 7 20 28K eventpoll_epi 135 135 100% 2.12K 135 1 540K kmem_cache 121 45 37% 0.69K 11 11 88K UNIX 119 114 95% 0.52K 17 7 68K idr_layer_cache 118 41 34% 0.06K 2 59 8K blkdev_ioc 112 32 28% 0.03K 1 112 4K tcp_bind_bucket 110 56 50% 0.17K 5 22 20K file_lock_cache 106 35 33% 0.07K 2 53 8K avc_node 105 98 93% 1.50K 21 5 168K TCP 105 100 95% 1.04K 15 7 120K bio_map_info 92 1 1% 0.04K 1 92 4K dnotify_cache 80 18 22% 0.19K 4 20 16K tw_sock_TCP 70 44 62% 0.27K 5 14 20K blkdev_requests 59 23 38% 0.06K 1 59 4K biovec-4 59 13 22% 0.06K 1 59 4K fib6_nodes 59 11 18% 0.06K 1 59 4K ip_fib_hash 59 11 18% 0.06K 1 59 4K ip_fib_alias 53 53 100% 0.07K 1 53 4K taskstats_cache 53 1 1% 0.07K 1 53 4K inotify_watch_cache 48 48 100% 0.16K 2 24 8K sigqueue 48 8 16% 0.08K 1 48 4K crq_pool 45 27 60% 0.25K 3 15 12K mnt_cache 45 29 64% 0.25K 3 15 12K dquot 45 32 71% 0.25K 3 15 12K sgpool-8 40 19 47% 0.19K 2 20 8K key_jar 32 32 100% 0.50K 4 8 16K sgpool-16 32 32 100% 1.00K 8 4 32K sgpool-32 32 32 100% 2.00K 16 2 64K sgpool-64 32 32 100% 4.00K 32 1 128K sgpool-128 31 31 100% 8.00K 31 1 248K size-8192 30 27 90% 1.54K 6 5 48K blkdev_queue 30 14 46% 0.12K 1 30 4K request_sock_TCP 30 3 10% 0.12K 1 30 4K inet_peer_cache FREE-M total used free shared buffers cached Mem: 8192 4821 3370 0 500 2793 -/+ buffers/cache: 1527 6664 Swap: 8191 0 8191 PROC-MEMINFO MemTotal: 8388608 kB MemFree: 3451384 kB Buffers: 512352 kB Cached: 2860580 kB SwapCached: 0 kB Active: 2971812 kB Inactive: 1178908 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 8388608 kB LowFree: 3451384 kB SwapTotal: 8388600 kB SwapFree: 8388600 kB Dirty: 644 kB Writeback: 0 kB AnonPages: 777524 kB Mapped: 24816 kB Slab: 557716 kB PageTables: 16300 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 12582904 kB Committed_AS: 1624128 kB VmallocTotal: 34359738367 kB VmallocUsed: 4556 kB VmallocChunk: 34359733771 kB =========================================================== Can any one provide any insights into a possible solution of this issue. -- Kind Regards, Sherin

2 1

(c 5.6) Running 2 versions of Apache ?
by Always Learning 02 Sep '11

02 Sep '11

Just wondering how to run 2 versions of Apache on the same server, listening on different IPs and both on port 80. Does one give them, the httpd, different names and effectively duplicate most of the Apache set-up ? I use Apache;s virtual hosts facility for normal purposes but this is for a different project. Thank you. Paul.

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Discuss September 2011