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  • General - Linux

    Virtualbox: can’t remove / attach new hard disk

    December 9, 2018 - By itdoctor

    When i try to remove a disk in Virtualbox with this command: I got the following error And the fix…

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  • General - Networking

    DNS: Why i can’t create txt record for sub domain?

    November 30, 2018 - By itdoctor

    Please check if your subdomain is a CNAME , the DNS rule does not allow CNAME record to have other…

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  • General - Linux

    cricket – rrdcached: some info in mind

    November 29, 2018 - By itdoctor

    rrdcached is a daemon that receives updates to existing RRD files, accumulates them and, if enough have been received or…

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  • General

    A detailed page about PHP thread.

    November 27, 2018 - By itdoctor

    ### A Detailed Page About PHP Threads: Understanding Multithreading in PHP PHP is one of the most widely used server-side…

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  • Database - General

    Mysql import from 5.6 to 5.7 : Column count of mysql.user is wrong. Expected 42, found 44. The table is probably corrupted

    November 26, 2018 - By itdoctor

    You might receive the error Column count of mysql.user is wrong. Expected 42, found 44. The table is probably corrupted…

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  • General - Phone

    Samsung J7 dead after not using for long time.

    November 20, 2018 - By itdoctor

    I had a samsung J7, it’s in the drawer for many months. today i tried to charge it, there was…

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  • General - Linux

    How to read rrd file?

    November 16, 2018 - By itdoctor

    [crayon-6870ad1e32850752047719/]   [crayon-6870ad1e32852138671210/] this command will get the avg value of ds1 (ds1 is the dataset – you can see…

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  • General - Linux

    Ubuntu 18.04 : how to run start up script

    November 7, 2018 - By itdoctor

    Create a service: [crayon-6870ad1e32947070625069/] Add your code there: [crayon-6870ad1e32949632832628/] Create and make sureĀ /etc/rc.localĀ is executable and add this code inside it:…

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  • General - Networking

    GRE keepalives in an existing IPsec tunnel

    October 30, 2018 - By itdoctor

    When you setup a GRE tunnel through an existing ipsec – the keepalives should be turn off , if you…

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  • General - Networking

    IPsec between Strongswan on AWS and Cisco IOS behind a NAT

    October 29, 2018 - By itdoctor

    My Strongswan : Local IP: 172.30.0.37 Elastic IP: 19.215.188.2 OS: Ubuntu My WAN: – Customer grade broadband Internet – Public…

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