3C健忘人 - 疑難排除不求人 - no more ask for IT help

1. change to root $ su - 2. grep pattern to authntication failure login user root $ cat /var/log/secure | grep -E 'authenctication failure.*rhost=.*user=root'             # AND  syntax 3. grep pattern  for OR syntax $ cat /var/log/secure | grep -E 'authentication failure|user=root'

@AnyDesk  1. Download from http://rpm.anydesk.com/rhel/8/x86_64/Packages/ $ wget  http://rpm.anydesk.com/rhel/8/x86_64/Packages/anydesk-6.1.1-1.el8.x86_64.rpm 2. Download required library of minizip from  https://download-ib01.fedoraproject.org/pub/epel/8/Everything/x86_64   $ wget https://download-ib01.fedoraproject.org/pub/epel/8/Everything/x86_64/Packages/m/minizip1.2-1.2.11-24.el8.x86_64.rpm   3. Installed by rpm $ su - $ rpm -ivh minizip1.2-1.2.11-24.el8.x86_64.rpm    @ Teamviewer 1. Download from https://download.teamviewer.com/download/linux/teamviewer.x86_64.rpm $ wget  https://download.teamviewer.com/download/linux/teamviewer.x86_64.rpm 2.Installed by dnf $ dnf install teamviewer.x86_64.rpm Refereces http://rpm.anydesk.com/howto.html https://www.teamviewer.com/tw/download/linux/

 1. System -> Feature Visibility 2. User&Device -> User Definition -> Add Usern -> Local User -> Account and Password pair -> contact information 3. User&Device -> User Group -> Type Firewall 4. VPN -> SSL-VPN Portals enable Limit Users to One-SSL-VPN Connection at a time disable Split Tunneling 5.VPN -> SSL-VPN Setting  Authentication/Portal mapping -> add tunnel-access for your VPN GROUP 6. Policy&Objects -> IPv4 Policy Caution:   Incoming Interface -> SSL-VPN tunnel interface Outgoing Interface -> wan1 Source -> SSLVPN_TUNNEL_ADDR1                 YOUR GROUP Destination ->  all Service -> ALL_TCP Action -> ACCEPT Enable NAT references https://docs.fortinet.com/product/fortigate/6.2

 1. login your account  from ssh connection with mail server $ touch ~/.forward $ echo 'account@forwarding.mail' >> ~/.forward $ chmod 644 ~/.forward   2. Other account at the same server $ su -    # change to root $ echo 'fromaccount: otheraccount' >> /etc/alias $ newaliases References https://unix.stackexchange.com/questions/301310/how-can-i-automatically-forward-system-mail  https://kb.iu.edu/d/aeur  

 1. 使用搜尋->輸入遠端桌面，找到如下圖開啟遠端桌面設定程式                     2. 點選啟用遠端桌面，並設定可存取此電腦的使用者帳戶，請記得帳戶要設定密碼                                 3.本遠端桌面連線方式適合用固定IP機器，或有設定IP forwarding 的被連線主機上，以下確認帳號密碼方式： 先搜尋  控制台 字串-> 使用者帳戶 -> 使用者帳戶 -> 管理帳戶 -> 變更帳戶 ，選擇建立密碼即可建立該帳號密碼   4.家裡電腦端，搜尋遠端桌面app，如下圖，執行後，再輸入欲連線的電腦(為辦公室電腦IP)跟辦公室登入帳號即可。 其他連線軟體方式， 可適用非固定式IP被連線主機 Anydesk https://anydesk.com/en 說明  https://support.anydesk.com/Help_Center Teamviewer https://www.teamviewer.com/tw/info/free-for-personal-use/ https://www.teamviewer.com/tw/download/previous-versions/ 請下載 portable 版本爲佳 說明 https://www.teamviewer.com/en/videos/ https://www.teamviewer.com/en/documents/   Google Remote Desktop https://remotedesktop.google.com/?hl=zh-TW&pli=1  https://chrome.google.com/webstore/detail/chrome-remote-desktop/inomeogfingihgjfjlpeplalcfajhgai?hl=zh-tw&skip_c...

Please connect internet before activation  1. search -> cmd.exe -> run as administrator 2. slmgr.vbs /ipk W6ABC-X7EDF-Y8GHI-Z9JKL-A0MNO   # example of SerialNumber 3. slmgr.vbs /ato p.s. To extend trial time span slmgr.vbs /rearm References https://docs.microsoft.com/zh-tw/windows-server/get-started/activation-slmgr-vbs-options

 <?php   $file_arr = array();  $dd = dir('uploads');   // files in this relative path   while ( $file = $d->read())  != false ) {        if(strlen($file)>2) {   // ./ and ../ is exceptional           $file_arr[]=$file;        }    }  $d->close();   // close file ptr sort($file_arr,SORT_NATURAL);   // or  natsort($file_arr); $i=1; foreach ($file_arr as  $sf){   echo $i.". ".$sf."<br>"; }   // print all sorted files ?> References https://www.php.net/manual/en/function.sort.php  https://www.php.net/manual/en/function.natsort.php  https://www.php.net/manual/en/function.natcasesort.php

 1. download libfluidsynth libfluidsynth1-1.1.11-14.1.x86_64.rpm packages for Fedora 26 from  ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/rncbc/Fedora_26/x86_64/libfluidsynth1-1.1.11-14.1.x86_64.rpm or http://rpm.pbone.net/info_idpl_61486622_distro_redhatel8_com_fluidsynth-libs-1.1.11-6.el8.x86_64.rpm.html  2. Install package with rpm -ivh $ su - $ rpm -ivh libfluidsynth1-1.1.11-14.1.x86_64.rpm $ dnf install vlc      #as refernce URL Reference https://www.videolan.org/vlc/download-redhat.html

 1.  open broser and go to https://developer.download.nvidia.com/compute/cuda/repos/rhel8/x86_64/cuda-rhel8.repo or download https://developer.download.nvidia.com/compute/cuda/repos/rhel8/x86_64/cuda-repo-rhel8-10.1.243-1.x86_64.rpm 2.  $ su - $ cp cuda-rhel8.repo /etc/yum.repos.d/ or $ rpm -ivh cuda-repo-rhel8-10.1.243-1.x86_64.rpm 3.  $ dnf update References https://developer.download.nvidia.com/compute/cuda/repos/rhel8/x86_64/