Discuss November 2015

discuss@lists.centos.org

130 participants
113 discussions

SSD for Centos SWAP /tmp & /var/ partition
by Keith Roberts 03 Sep '25

03 Sep '25

Has anyone actually used a SSD in a Centos setup? My little experiment with a s/h WD drive for /tmp and SWAP partitions kicked the bucket on Wednesday, when the poor WD drive caught the click-of-death. It was a s/h drive to start with and lasted about 4 months. But that was without the /var/log/ partition being written to it, as I mounted that back onto /var/log from the original drive. So I had to install another (WD) drive, and repartion it and rebuild my RPM package database, from the backed-up Packages file. That seems to be all OK now. I'm wondering if it would be a good idea to use a new SSD for moving all the disk i/o to, that Linux likes to do so often. Plus putting SWAP onto a decent SSD should speed things up somewhat. Here's a short video of a laptop fitted with a SSD drive booting macOS, compared to a similar laptop booting from the standard HDD. The laptop with the SSD boots and loads some apps in 28 seconds. The other one takes twice as long. http://eshop.macsales.com/shop/SSD/OWC/Mercury_Extreme_Pro_6G/?utm_source=t… Kind Regards, Keith Roberts ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------

32 94

I want to connect to a l2tp server from centos.
by Eliezer Croitoru 22 Mar '17

22 Mar '17

I have a server currently connecting to a pptp remote server. This server(lns\lac) has the option for pptp connections and l2tp connections. The l2tp connections are not using ipsec encryption at all. I have seen couple guides\tutorials on the internet: - https://raymii.org/s/tutorials/IPSEC_L2TP_vpn_on_CentOS_-_Red_Hat_Enterpris… - https://wiki.archlinux.org/index.php/L2TP/IPsec_VPN_client_setup But all the guides that I have found are using ipsec with "secret". On ubuntu there is a gui applet that helps setting these kind of connections up but I am working with a CentOS server and not Ubuntu desktop. If someone used l2tp the same way I want to use on CentOS 7 please give me some advice. If you have a guide which might help me I will be more then happy to see this one. Thanks, Eliezer

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Broadcom BCM4313 support broken with kernel 2.6.32-573.7.1.el6.centos.plus.x86_64?
by wwp 24 Aug '16

24 Aug '16

Hello, I noticed that with latest kernel (2.6.32-573.7.1.el6.centos.plus.x86_64), my laptop's Wifi doesn't work, whereas with previous kernel (2.6.32-504.30.3.el6.centos.plus.x86_64), it works fine. Is this a known issue or did I miss something new? BTW, `lspci` says: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01) Regards, -- wwp

2 2

Any further developments on CentOS7 for i386?
by Kay Schenk 22 Jun '16

22 Jun '16

Well I haven't tested out the CentOS 7 for i386 yet as sent in the message of 06/02-- https://lists.centos.org/pipermail/centos-devel/2015-June/013426.html Nor have I seen any additional information. So how is this going? I'm almost ready to jump in as I would really prefer to be on Gnome 3. -- -------------------------------------------- MzK “The journey of a thousand miles begins with a single step.” --Lao Tzu

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abrt-watch-log -F BUG: WARNING: at WARNING: CPU: INFO: possible recursive locking detected
by Michael H 15 Feb '16

15 Feb '16

Hi All, I've been tuning a server recently and just today this has started to appear in my top/htop output. [root@db1 ~]# ps -aux | grep kernel root 1011 0.0 0.0 212048 4532 ? Ss 13:34 0:00 /usr/bin/abrt-watch-log -F BUG: WARNING: at WARNING: CPU: INFO: possible recursive locking detected ernel BUG at list_del corruption list_add corruption do_IRQ: stack overflow: ear stack overflow (cur: eneral protection fault nable to handle kernel ouble fault: RTNL: assertion failed eek! page_mapcount(page) went negative! adness at NETDEV WATCHDOG ysctl table check failed : nobody cared IRQ handler type mismatch Machine Check Exception: Machine check events logged divide error: bounds: coprocessor segment overrun: invalid TSS: segment not present: invalid opcode: alignment check: stack segment: fpu exception: simd exception: iret exception: /var/log/messages -- /usr/bin/abrt-dump-oops -xtD I had made a few changes to sysctl.conf which I have now reverted and the error still exists. my sysctl.conf contained; vm.swappiness=0 vm.overcommit_memory=2 vm.overcommit_ratio=90 - this was only added this morning because of an 'out of memory' error in postgresql. kernel.shmmax=35433480192 kernel.shmall=2214592512 which I have now removed. Can anyone shine any light on this? A little search on Google mentions faulty memory, I will install memtest today and see what the output is like. Thanks Michael

2 1

yum errors
by Wes James 08 Dec '15

08 Dec '15

I have inherited centos 6.3 and 6.2 vms in an esxi environment. When I do yum provides ntpd on the 6.3 box I get a lot of errors like: Loaded plugins: fastestmirror, presto Loading mirror speeds from cached hostfile * base: mirror.unl.edu * extras: mirrors.cmich.edu * updates: mirror.steadfast.net http://mirror.unl.edu/centos/6.4/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Trying other mirror. http://mirror.ash.fastserv.com/pub/linux/centos/6.4/os/x86_64/repodata/repo…: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Trying other mirror. http://mirrors.einstein.yu.edu/centos/6.4/updates/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.einstein.yu.edu/centos/6.4/updates/x86_64/repodata/repomd.xml: (28, 'connect() timed out!') Trying other mirror. http://mirrors.versaweb.com/centos/6.4/updates/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.versaweb.com/centos/6.4/updates/x86_64/repodata/repomd.xml: (28, 'connect() timed out!') Trying other mirror. Why am I getting these errors? I installed 6.4 in virtualbox and the .repo files seem the same, except the 6.3 box didn’t have a fastback.repo file. Also why is it looking at 6.4 repos above? When I see: cat /etc/redhat-release CentOS release 6.3 (Final) i.e., this box is 6.3. Shouldn’t it be looking for 6.3 repo info? Thanks, -wes

8 24

About CentOS Marks
by Takuya Yamamoto 07 Dec '15

07 Dec '15

Hello https://www.centos.org/legal/trademarks/ According to above, I found following message. ---------------------- Notwithstanding anything to the contrary provided in these Guidelines, the following are examples of unacceptable uses: 1.Use of the CentOS Marks in connection with commercial redistribution of CentOS software ---------------------- I have a question. What means "Use of the CentOS Marks"? For example, While CentOS is booting up, CentOS show the CentOS logo on Full screen. Is it unacceptable? Or acceptable? If commercial redistribution of CentOS software, Developer have to hide this logo? For example, CentOS System is working, user can show the "CentOS" text words on console. Is it unacceptable? Or acceptable? br ----------------------- Yamamoto Takuya

2 1

Idiot-proof method to format a flash drive
by Frank Cox 01 Dec '15

01 Dec '15

Whenever I format a flash drive I'm always terrified that I'm going to fat-finger something in the terminal and accidentally blow away a partition on one of my hard drives. *shudder* Is gparted the best gui to handle this task? Or is there something better? I'd really prefer something more limited that just allows me to select whatever it sees as a removable drive and disallows any screwin' about with the other drives. "Format the USB connected drive?". "Choose format (ext4, ext3, fat32)". "Blammo." -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com

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SOT: MariaDB 5.5.x-MariaDB logs are not going to desired .log file
by reynierpm＠gmail.com 30 Nov '15

30 Nov '15

Hi there, I know this is off-topic or semi off-topic but I really need some help since I am stucked. I'm trying to redirect MariaDB logs to `/var/log/mysql/*.log` files as shown below on the `/etc/my.cnf.d/server.cnf` file: # # These groups are read by MariaDB server. # Use it for options that only the server (but not clients) should see # # See the examples of server my.cnf files in /usr/share/mysql/ # # this is read by the standalone daemon and embedded servers [server] # this is only for the mysqld standalone daemon [mysqld] #wait_timeout=28800 #interactive_timeout = 28800 max_allowed_packet=512M #General Query Log general_log_file = /var/log/mysql/mysql_query.log general_log = 1 #Error Log log_error = /var/log/mysql/mysql_error.log #Slow Query Log slow_query_log = 1 slow_query_log_file = /var/log/mysql/mysql_slow.log long_query_time = 2 log-queries-not-using-indexes collation-server = utf8_general_ci init-connect='SET NAMES utf8' character-set-server = utf8 # this is only for embedded server [embedded] # This group is only read by MariaDB servers, not by MySQL. # If you use the same .cnf file for MySQL and MariaDB, # you can put MariaDB-only options here [mariadb] # This group is only read by MariaDB-10.0 servers. # If you use the same .cnf file for MariaDB of different versions, # use this group for options that older servers don't understand [mariadb-5.5] `mysql_query.log`, `mysql_error.log` and `mysql_slow.log` should go to `/var/log/mysql/`, right? For some reason, unknow to me, they are not going. I did run the following query: MariaDB [(none)]> show variables like '%log%'; And this is the output: +-------------------------------------------+--------------------------------------------------------------------------------------------------------------+ | Variable_name | Value | +-------------------------------------------+--------------------------------------------------------------------------------------------------------------+ | aria_checkpoint_log_activity | 1048576 | | aria_log_file_size | 1073741824 | | aria_log_purge_type | immediate | | aria_sync_log_dir | NEWFILE | | back_log | 50 | | binlog_annotate_row_events | OFF | | binlog_cache_size | 32768 | | binlog_checksum | NONE | | binlog_direct_non_transactional_updates | OFF | | binlog_format | STATEMENT | | binlog_optimize_thread_scheduling | ON | | binlog_stmt_cache_size | 32768 | | expire_logs_days | 0 | | general_log | OFF | | general_log_file | pdone-prod.log | | innodb_flush_log_at_trx_commit | 1 | | innodb_locks_unsafe_for_binlog | OFF | | innodb_log_block_size | 512 | | innodb_log_buffer_size | 8388608 | | innodb_log_file_size | 5242880 | | innodb_log_files_in_group | 2 | | innodb_log_group_home_dir | ./ | | innodb_mirrored_log_groups | 1 | | innodb_recovery_update_relay_log | OFF | | innodb_use_global_flush_log_at_trx_commit | ON | | log | OFF | | log_bin | OFF | | log_bin_trust_function_creators | OFF | | log_error | /var/lib/mysql/pdone-prod.pdi-inc.com.err | | log_output | FILE | | log_queries_not_using_indexes | OFF | | log_slave_updates | OFF | | log_slow_filter | admin,filesort,filesort_on_disk,full_join,full_scan,query_cache,query_cache_miss,tmp_table,tmp_table_on_disk | | log_slow_queries | OFF | | log_slow_rate_limit | 1 | | log_slow_verbosity | | | log_warnings | 1 | | max_binlog_cache_size | 18446744073709547520 | | max_binlog_size | 1073741824 | | max_binlog_stmt_cache_size | 18446744073709547520 | | max_relay_log_size | 0 | | relay_log | | | relay_log_index | | | relay_log_info_file | relay-log.info | | relay_log_purge | ON | | relay_log_recovery | OFF | | relay_log_space_limit | 0 | | slow_query_log | OFF | | slow_query_log_file | pdone-prod-slow.log | | sql_log_bin | ON | | sql_log_off | OFF | | sync_binlog | 0 | | sync_relay_log | 0 | | sync_relay_log_info | 0 | +-------------------------------------------+--------------------------------------------------------------------------------------------------------------+ 54 rows in set (0.01 sec) I have tried putting same config at `[mariadb]` and `[mariadb-5.5]` and result is the same. Why changes are not working? I have restarted MariaDB (mysql) service several times and even I have restarted the whole server. Seems like MariaDB is not reading those values, any advice?

2 3

Thunderbird 38.4.0 not offered, see it in packages, repomd outdated?
by Patrick Bervoets 30 Nov '15

30 Nov '15

Hi, first: I did several yum clean all's :-) Thunderbird 38.4.0 is not offered. I see: http://mirror.centos.org/centos/6/updates/x86_64/Packages/thunderbird-38.4.… - 27-Nov-2015 06:58 - 56M But: http://mirror.centos.org/centos/6/updates/x86_64/repodata/repomd.xml - 18-Nov-2015 20:00 - 3.4K Shouldn't repomd also be updated or am I mistaken? Thanks Patrick

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Discuss November 2015