Recent Questions - Server Fault |
- Moving of Big query Datasets between data locations
- Route untagged vlan to a tagged vlan with nftables
- How to run a batch file on my websites host machine
- Openstack Swift fallocate_reserve option not working
- Unexpected behavior of number of instance when rolling update function for production deployment
- Migrate from IBM Directory Server 8 to MS Active Directory (Windows Server 2019)
- Are "apache2-dev" and "libtool" dangerous leaving them installed on the system?
- SPF Out of Range
- Hosting VPS, should I buy a public IP range?
- Having issue with applying CU23 onto Exchange 2013
- Nginx redirect URLs with dynamic parameters
- Incomplete axfrdns response
- Difference between pip install cudatoolkit=9.0 and download install from CUDA website
- Nginx Sorry, the page you are looking for is currently unavailable. Please try again later
- How to debug why I'm loosing connection to my Docker container when VPN is up?
- postfix-Postfwd rate limit
- Enable and disable scheduled task with PowerShell and variable
- Data Transfer Pauses on LSI 9271 RAID Controller
- "renaming" a drive in a ZFS pool?
- Express.js fails to serve all static files on heroku
- Exim can't send email (unable to set gid or uid forcing real = effective)
- Hardware/BIOS - IBM x3200 m2
- Extract portion of text file between blank lines via batch
- mysqltuner script to optimize my mysql database
- SSH Client sporadically hangs for few seconds
- How do I change the root path in nginx
- SQL Server Failover Cluster on Azure (HA Strategy)
- Spamassassin filter mail with attachment
- How to undo DROP Table?
| Moving of Big query Datasets between data locations Posted: 21 Mar 2021 10:09 PM PDT I need to move data of some big query data sets from one data location to another without losing any in-flight data.I understand GCP supports data transfers between data sets but this requires multiple data sets to be created . Ex: To change data location of Dataset "A" , we need to create an empty Data set "B" (in the intended data location) and copy data set "A" to "B". Now, once the copy is done , we need to delete "A" , and , again create an empty data set "A"(in the intended data location) and copy from "B" to "A" and then delete "B". is there a better way of doing it?  |
| Route untagged vlan to a tagged vlan with nftables Posted: 21 Mar 2021 08:51 PM PDT I have played around a lot with nftables, but I am stuck on this problem for the entire day. I have a wifi ssid that gets tagged vlan20. This part works, and I can see that dnsmasq is assigning ip addresses from this range: I connected a spare android phone to this SSID, and it gets assigned a DHCP address from the pool. On the router, I can connect to this device, so basic connectivity is good. I opened sshd on this phone on port 50022, and I can connect to that port as well. How do I extend this with nftables so that all hosts in my untagged vlan (which is all my trusted computers) can connect to this vlan? My plan is to segment vlan20 so that the iot devices in there cannot reach out to my home network, but my phone and other computers can reach to any device in here. My current configs are a mess because of all the experiments I did, but I shoved this in with the hopes that this would make the vlan wide open (spoiler alert: It didn't): For completeness, this is my systemd-networking config:  |
| How to run a batch file on my websites host machine Posted: 21 Mar 2021 08:02 PM PDT i have a batch file on my websites host computer and i want to have a button on the website that will execute the batch file on the host so that i can start services remotely. -Meepso  |
| Openstack Swift fallocate_reserve option not working Posted: 21 Mar 2021 07:42 PM PDT I'm using "fallocate_reserve = 5368709120" as an option in account, container and object confs, to make sure 5G reserve space remains on the disks and the the disks does not get filled up. However, while uploading larger objects, it does not limit or move over to other free disk, but keeps filling same disk after reserve to 100% , even though above reserve option of 5G is used. Can you help or guide please. Thank you.  |
| Unexpected behavior of number of instance when rolling update function for production deployment Posted: 21 Mar 2021 07:20 PM PDT We are using rolling update function for production deployment. Expected behavior of number of instance is below. 1 -> 2 -> 1 We have confirmed this expected behavior until Jan-2021. However, the behavior of number of instance is changed from Feb-2021 like below. 1 -> 0 -> 1 Could you please advise us the cause? And, we would like to realize our production deployment without stopping our production service. Please advise us the necessary procedures or settings in rolling update.  |
| Migrate from IBM Directory Server 8 to MS Active Directory (Windows Server 2019) Posted: 21 Mar 2021 07:19 PM PDT We are in a project to migrate users and passwords from IBM Directory Server v8 to Microsoft Active Directory. Use of IBM Directory Integrator (LDAPSync) is referenced in official IBM documentation. I wanted to know if someone has had a similar case and what would be the recommendation to carry out the migration keeping the passwords of the users (which are encrypted from the application layer)? Thanks a lot!  |
| Are "apache2-dev" and "libtool" dangerous leaving them installed on the system? Posted: 21 Mar 2021 05:23 PM PDT I have installed Apache2-Dev and Libtool on my system to compile an Apache2-Mod. I was wondering if I should remove all 94 installed packages from my system or if I can leave them on the system. Are they in any way harmful in the wrong hands or can they be carried out by a person outside the ssh terminal? Full package list:  |
| Posted: 21 Mar 2021 04:51 PM PDT I've got my domain set up to use Gmail, and I consistently get a specific error email I email a specific person.
When I test my record using this tool: https://toolbox.googleapps.com/apps/checkmx/ I get SPF ranges, that do not include to IP address above, but do include many others. And... I am lost. Any ideas?  |
| Hosting VPS, should I buy a public IP range? Posted: 21 Mar 2021 04:34 PM PDT I'm wanting to start my own VPS providing service. I noticed that the big companies of the domain are using public IPs for the client's VPS (the client directly accesses the VPS using a public IP that is assigned to this VPS). Is this mandatory? Because IPv4 is expensive, even a /29. Or else, is there any way to provide the simplest access to the VPS for the client (like Bastion for SSH gateway, or something like that)?  |
| Having issue with applying CU23 onto Exchange 2013 Posted: 21 Mar 2021 10:28 PM PDT I am new to this forum. I need to update my exchange 2013 because of the recent microsoft vulnerability and also because it needs to be updated for the migration to office 365. My exchange is 2013 and it is version 15 Build is 1395.4 . I have a strange issue where I download CU23 to the exchange server. I extract the files into a separate folder. I then run the setup.exe in the extracted folder. What happens next is puzzling. I get a message that it is being initialized and then I get the following screen that I have attached below. I am not sure why but this is what I keep getting. next is greyed out and I cant do anything with the options I am presented. Some things I tried: -I ran it using admin credentials -I opened it as an administrator -I have domain admin, schema admin and exchange organization admin permissions on the user that is opening this file -I do have the latest pre requisites as I get asked to repair or uninstall them when I try installing This upgrade is something that needs to happen for the migration project and for security reasons. Any help would be appreciated. Thanks enter image description here  |
| Nginx redirect URLs with dynamic parameters Posted: 21 Mar 2021 09:55 PM PDT Customers from the internet need to access a web server accessible only from VPN, the domain is internal.domain and I have no control over it. Internally, the main page to log in is caas.internal.domain:6643. To connect from the internet, the users log in to the URL login.external.domain:9943 pointing to the nginx that routes the traffic to caas.internal.domain:6643 through the VPN. The response traffic from caas.internal.domain is redirected to login.external.domain not problem. All internal.domain Urls in html, json, js are replaced with external.domain. The only issue is coming from the internal url below with query string parameters that it is not translated. should be replaced with with 1234 and 5678 dynamic. this is my config: How could I get internal urls variables replace with external urls with the same variables? Hope that makes sense Many thanks  |
| Posted: 21 Mar 2021 04:45 PM PDT I'm trying to setup djbdns ( I get this error message in the But in fact, the If I do the transfer request manually with Obviously, this is not the end of the file. The full response (names have been slightly changed, for privacy purpose): I
I thought it could be something in the Each query response packet in the tcpdump contains multiple DNS response. How can I transfer my whole zone (~340 entries) with  |
| Difference between pip install cudatoolkit=9.0 and download install from CUDA website Posted: 21 Mar 2021 10:03 PM PDT I have a simple confusion, what is difference between  |
| Nginx Sorry, the page you are looking for is currently unavailable. Please try again later Posted: 21 Mar 2021 05:05 PM PDT I have a nginx server (1.10) and I am trying to access a certain location block for letsecnrypt but having no luck. I have modsecurity and pagespeed both included in my compiled nginx. OS is Ubuntu 16.04 LTS Here is my nginx location block: I have so far checked EDIT** Just gave  |
| How to debug why I'm loosing connection to my Docker container when VPN is up? Posted: 21 Mar 2021 07:06 PM PDT I'm using Docker 18.06.1-ce on Ubuntu 16, and I have a container exposing 8012 port. When I do I get response But when VPN is up (openfortivpn) after long time waiting I get When I mess my port number, I instantly get error: How to debug and fix this? Obviously localhost pings, and traceroute to it is one hop.  |
| Posted: 21 Mar 2021 06:00 PM PDT I have total 4000 mail for an outgoing recipient and I want to send mail 2 mail every 1 minute. so I have configured postfwd. and after 2 mails all the mails rejected and mailq empty. my requirment is send 2 mail and hold the mail for 1 minutes and send mail again.  |
| Enable and disable scheduled task with PowerShell and variable Posted: 21 Mar 2021 04:01 PM PDT if I try to enable and disable a scheduled task with PowerShell this works. But if I'm trying this with a variable I'll got an error. How could I do this with the variable? Edit: This error occurs.  |
| Data Transfer Pauses on LSI 9271 RAID Controller Posted: 21 Mar 2021 05:07 PM PDT I have a server equipped with a LSI 9271-8i RAID controller, with 4 x 4TB organized as RAID-5 and 1 x 8TB as JBOD (which is called RAID-0 in the controller). When I copy bigger amounts of data (~1 TB), I can observe the following: for the first few gigabytes the transfer speed is fine and limited by the disk or network speeds, usually ~100MB/s. But after a while, the transfer completely pauses for approx. 20-30 seconds, and continues then with the next approx. 1 GB. I copy a lot of files with each between 10MB and 500MB, and during the pause robocopy stays at a file and continues to the next after the pause. That way the overall transfer rate drops to ~20MB/s. During the pause, browsing the drives' files is not possible, and in one case I received an controller reset error message ("Controller encountered a fatal error and was reset"). Also accessing controller data with the CLI tool is not possible during that pause (the result is displayed when the pause is over). I could observe this behaviour when copying
There is nothing going on that looks suspicious to me: temperatures (disks, BBU) are within the valid range, controller temp seems a bit high, but also within specs. No checks are running on the RAID, no rebuild in progress. Any guesses? Before I replace the controller, I want to try optimizing the thermal situation. Does this behaviour sound like a possibly thermal issue? I find it strange that the first 20-30 GB are working fine, and the pauses are not ocurring before that. If I leave the server alone for a while and retry, then again a few GBs are copied fine. The only naive explanation for me is that the controller gets too hot. Why the controller and not the disks? The RAID-5 disks are 7200rpm and stacked very closely, while the JBOD single disk is 5400rpm and with a lot of air around. Would be strange if both would show the same overheating symptoms.  |
| "renaming" a drive in a ZFS pool? Posted: 21 Mar 2021 08:05 PM PDT So I'm playing around with ZFS on what will eventually be a file server, and I managed to get myself into this state: I did this by building a 5 drive raidz2 pool, then intentionally corrupting one of the disks, then somehow removing/replacing it. But I think at some point I added the disk using the sdX label instead of what I wanted, which is the "by-id" label. The array works in this state, but if it were production I'd much rather have the naming consistent, and at some level I'm really just trying to understand it better. What are possible ways to "rename" this last device? (Other than completely destroying the pool!)  |
| Express.js fails to serve all static files on heroku Posted: 21 Mar 2021 10:03 PM PDT there, I have a little problem with node.js and express on heroku. I have a node.js server that loads up my index.html page and other resources: This works grand on localhost, but when I deploy it to heroku from dropbox it only loads certain things like css and js files, all of which are in sub directories. The things that aren't loaded are the icon.png files from the folders in the applications folder. Dir structure: The app here) (type
and click login and check the console for 404 errors. Let me know if you need anything else. Any ideas? What can i change to get rid of these errors and load everything properly? Thanks in advance! ERRORS: image  |
| Exim can't send email (unable to set gid or uid forcing real = effective) Posted: 21 Mar 2021 08:05 PM PDT I've a debian Jessie and Exim4. I can't send email from php, error given is: unable to set gid=33 or uid=0 (euid=0): forcing real = effective I've tried to search for this problem but nothing helps me. One solution found was to add trusted_user in exim configuration, but not works either Someone can help me?  |
| Posted: 21 Mar 2021 04:01 PM PDT When I turn on my machine, the display is not throwing any output to it. The fans are running fine. The LED lights indicate no error, ' Only two LED's are blinking "Mini-BMCheartbeat LED" and "Standby power LED" The article mentions about the error LED's There are three jumpers(jp1,jp3,jp6) which are in the default locations Further analysis showed me that, I have blowed the Motherboard BIOS, it needs to be re-flashed with new bios Could anyone please assist me in fixing this and let me know if more information is required.
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| Extract portion of text file between blank lines via batch Posted: 21 Mar 2021 09:02 PM PDT I need to be able to extract a portion of a text file that occurs between two blank lines. The text file looks something like this... So, I can search and locate the "> VALUE TO SEARCH <" within the text file, but then I need to be able to grab everything up to the preceding blank line and everything down to the trailing blank line of that one section. Does that make sense? Anyway, the number of lines per section varies, but there is always a single blank line between sections. Can this be done via batch file? If so, how? Thanks in advance!  |
| mysqltuner script to optimize my mysql database Posted: 21 Mar 2021 05:05 PM PDT I have a Dedicated Server running an php eshop. The server is built on Debian 7.8 64Bit, and has 12 cores and 64GB RAM. I try to use the mysqltuner script to optimize my mysql database. The current query_cache_size is set to 256MB. I am not sure I should continue increase this number as suggested or not. Also, A) could you tell me why the Query cache prunes per day(111209) is so high? How can I to reduce this? B) why the Table cache hit rate is only 56% How can i achieve better cache hit rate?
[OK] Logged in using credentials from debian maintenance account. [OK] Currently running supported MySQL version 5.5.43-0+deb7u1-log [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MRG_MYISAM [--] Data in MyISAM tables: 34M (Tables: 157) [--] Data in InnoDB tables: 422M (Tables: 4) [--] Data in PERFORMANCE_SCHEMA tables: 0B (Tables: 17) [!!] Total fragmented tables: 14 -------- Security Recommendations ------------------------------------------- [OK] All database users have passwords assigned -------- Performance Metrics ------------------------------------------------- [--] Up for: 12h 49m 55s (2M q [59.876 qps], 138K conn, TX: 6B, RX: 476M) [--] Reads / Writes: 76% / 24% [--] Total buffers: 32.3G global + 2.8M per thread (600 max threads) [OK] Maximum possible memory usage: 33.9G (53% of installed RAM) [OK] Slow queries: 0% (0/2M) [OK] Highest usage of available connections: 1% (9/600) [OK] Key buffer size / total MyISAM indexes: 16.0M/36.1M [OK] Key buffer hit rate: 100.0% (1B cached / 17K reads) [OK] Query cache efficiency: 70.2% (1M cached / 2M selects) [!!] Query cache prunes per day: 111209 [OK] Sorts requiring temporary tables: 0% (223 temp sorts / 70K sorts) [!!] Joins performed without indexes: 5298 [OK] Temporary tables created on disk: 18% (13K on disk / 72K total) [OK] Thread cache hit rate: 99% (9 created / 138K connections) [OK] Table cache hit rate: 56% (239 open / 423 opened) [OK] Open file limit used: 0% (403/1M) [OK] Table locks acquired immediately: 99% (1M immediate / 1M locks) [OK] InnoDB buffer pool / data size: 32.0G/422.7M [OK] InnoDB log waits: 0 -------- Recommendations ----------------------------------------------------- General recommendations: Variables to adjust:  |
| SSH Client sporadically hangs for few seconds Posted: 21 Mar 2021 07:06 PM PDT On Ubuntu 14.04 LTS when I use SSH client, it hangs sporadically for few seconds every minute or so. no input is lost is just delayed. SSH -V .ssh/config /etc/ssh/ssh_config Same machine has Ubuntu 12.04 LTS with the same configuration, works fine. other machine works fine with the same server as well. SSH -V  |
| How do I change the root path in nginx Posted: 21 Mar 2021 08:00 PM PDT I have installed This is the default I tried changing root to  |
| SQL Server Failover Cluster on Azure (HA Strategy) Posted: 21 Mar 2021 06:00 PM PDT In the context of SQL Server 2012 Standard Edition, is it possible to make Azure Blob storage available to a SQL Failover cluster directly as a shared SCSI resource on a Windows Cluster? An Azure blob is effectively shared storage, and a newly added disk on an Azure VM, does show up as a SCSI disk, before it is converted into a Volume (GPT). Does SQL Server support writing to such a shared blob storage, directly, from two clustered instances?  |
| Spamassassin filter mail with attachment Posted: 21 Mar 2021 09:02 PM PDT I would like to add a spamassassin rule based on if a message coming from a particular sender has an attachment or not. Is there a way to filter messages from a certain sender so that mails without attachment get a low score but mails with attachments get labeled as spam ?  |
| Posted: 21 Mar 2021 06:22 PM PDT I accidentally dropped all tables. Can I restore back? I don't have the backup copy.  |
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