How TECH

Install docker Ubuntu 22.04 Install docker Ubuntu 22.04 nano install_docker.sh #!/bin/bash # Update your existing list of packages sudo apt update # Install a few prerequisite packages which let apt use packages over HTTPS sudo apt install -y apt-transport-https ca-certificates curl software-properties-common # Add the GPG key for the official Docker repository to your system curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg # Add the Docker repository to APT sources echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null # Update the package database with Docker packages from the newly added repo sudo apt update # Make sure you are about to install from the Docker repo instead of the default Ubuntu repo sudo...

Checking your WAF /  Front DOOR / Cloudflare is working Using the this in your request will get a block and you can see in the log. https://www.yourdomain.com/?a=b%20AND%201=1 ;-)

Have a problem in your DSC configuration. "Failed to apply the configuration. These resources produced errors: [nxFile]MyFolder. Detailed error information can be found in the log file.\"}"]

Nginx add internal configuration to use http_stub_status_module

Simple Nginx proxy reverse configuration add the file proxy.conf in /etc/nginx/conf.d/ proxy_http_version 1.1; proxy_set_header Host               $http_host; proxy_set_header X-Real-IP          $remote_addr; proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto  $scheme; proxy_set_header Upgrade            $http_upgrade; proxy_set_header Connection         "Upgrade";  Configuration for the domain simple server { listen 80; listen [::]:80; server_name example.com; location / {   include conf.d/proxy.conf; proxy_pass http://192.168.123.321:3000/; } }

How make a script using a local or remote variable in other script  Sample SCRIPT  #!/bin/bash ## find the last or new backup file in the folder and create a variable name DBFILE DBFILE=`ssh -t serverB@192.0.0.1 "sudo find /temp/backup.sql -type f -mtime -1 -name "*.sql""`  ###( just show the name file) echo $DBFILE   ###  send the variable local to remote server echo here is DBFILE $DBFILE #ssh -t serverB@192.0.0.1 "sudo cp $DBFILE /home/user/" ## Script execute remote with the variable  #/usr/bin/scp serverB@192.0.0.1:/home/user/$DBFILE  /opt/temp

How to compress the MP4 files. find . -type f -name "*.MP4" -exec bash -c 'FILE="$1"; ffmpeg -i "${FILE}" -s 1280x720 -acodec copy -y "${FILE%.mp4}.shrink.mp4";' _ '{}' \;

Varnish Optimisation cache # # This is an example VCL file for Varnish. # # It does not do anything by default, delegating control to the # builtin VCL. The builtin VCL is called when there is no explicit # return statement. # # See the VCL chapters in the Users Guide at https://www.varnish-cache.org/docs/ # and https://www.varnish-cache.org/trac/wiki/VCLExamples for more examples. # Marker to tell the VCL compiler that this VCL has been adapted to the # new 4.0 format. vcl 4.0; # Default backend definition. Set this to point to your content server. backend default { .host = "127.0.0.1"; .port = "8080"; } sub vcl_recv { # Happens before we check if we have this in cache already. # # Typically you clean up the request here, removing cookies you don't need, # rewriting the request, etc. # Happens before we check if we have this in cache already. # # Typically you clean up the request here, removing cookies you ...

#### gs gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf $INPUTFILE ### pdf2ps && ps2pdf pdf2ps input.pdf output.ps && ps2pdf output.ps output.pdf ### Webservice http://compress.smallpdf.com/de For linux #!/bin/sh gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages -dCompressFonts=true -r150 -sOutputFile="compress_$@" "$@" ./compresspdf.sh file.pdf find -type f -name "*.pdf" -exec ./compresspdf.sh {} \; #!/bin/sh INPUT = $1 ; shift OUTPUT = $1 ; shift GS_BIN =/ usr / bin / gs QFACTOR = "0.40" # Image Compression Quality # # Quality HSamples VSamples QFactor # Minimum [2 1 1 2] [2 1 1 2] 2.40 # Low [2 1 1 2] [2 1 1 2] 1.30 # Medium [2 1 1 2] [2 1 1 2] 0.76 # High [1 1 1 1] [1 1 1 1] 0.40 # Maximum [1 1 1 1] [1 1 1 1] 0.15 $ { GS_BIN } - dBATCH - dSAFER - DNOPAUSE -...

Reduce images files png or jpg jpeg in subdirectories find -type f -name "*.jpeg" -exec jpegoptim --strip-all {} \; optipng *.png find -type f -name "*.png" -exec optipng {} \;

How to monitor or block DDOS in Haproxy https://www.haproxy.com/blog/introduction-to-haproxy-stick-tables/ Configuration to monitor access This configuration just will TAG the external IP in the   abuse table, if need block something just remove the double #, to change the level of monitoring increase or reduce the number of connection   level. # ABUSE SECTION works with http mode dependent on src ip ## tcp-request content reject if { src_get_gpc0(Abuse) gt 5000 } acl abuse src_http_req_rate(Abuse) ge 5000 acl flag_abuser src_inc_gpc0(Abuse) ge 100 acl scanner src_http_err_rate(Abuse) ge 5000 # Abuse protection. # Sources that are not filtered. tcp-request content accept if { src -f /etc/haproxy/whitelist.lst } # Sources rejected immeditely. tcp-request content reject if { src -f /etc/haproxy/blacklist.lst } # Limiting the connection rate per client. No more than 5000 connections over 3 seconds. ## tcp-request content reject if { ...

Change the MTU Putty / SSH / Termius  freeze.  After changing the MTU of Windows TAP adapter to 1200, it works fine. 

Sometimes when the Debian is old, and you try to install or update something, the APT doesn't work in Debian machine in Azure VM, need to update the apt. I got these errors Err http://debian-archive.trafficmanager.net/debian/ jessie-backports/main pinen                                                                                                                                                     try-gtk2 amd64 0.9.7-5~bpo8+1   404  Not Found [IP: 52.233.239.54 80] Get:6 http://debian-archive.trafficmanager.net/debian/ jessie/main gnupg-agent a              ...

Error in haproxy with lets encrypt error msg bind *:443' : inconsistencies between private key and certificate loaded from PEM file '/etc/letsencrypt/live/ Need to create a new file cat cert.pem privkey.pem > haproxy_cert.pem Add in haproxy frontend www         bind *:80         bind *:443  ssl crt /etc/letsencrypt/live/mydomain.com/haproxy_cert.pem and make a test haproxy -c -V -f /etc/haproxy/haproxy.cfg

Instalando SARG ubuntu 14.04

Quando você tentar fazer a instalação de algum programa no ubuntu e ele diz que não é possível execute apt-get -f install para forçar ou continuar a instalar os pacotes etc, e fica em um loop eterno, o servidor deve estar com a partição de boot cheia, verifique o volume dando o comando df -h caso esteja em 100% execute o comando abaixo para limpar. uname -r verifique o KERNEL que o servidor tem instalado sudo dpkg --list 'linux-image*' removendo as versões não desejáveis. sudo dpkg -r linux-image-3.2.0-23-generic or sudo dpkg --force-depends --purge linux-image-3.2.0-23-generic

Munin Para instalar sudo apt-get install munin Configurar sudo vim /etc/munin/munin.conf Arquivo do munin.conf # Example configuration file for Munin, generated by 'make build' # The next three variables specifies where the location of the RRD # databases, the HTML output, logs and the lock/pid files. They all # must be writable by the user running munin-cron. They are all # defaulted to the values you see here. # dbdir /var/lib/munin htmldir /var/www/munin logdir /var/log/munin rundir /var/run/munin # # Where to look for the HTML templates # tmpldir /etc/munin/templates # (Exactly one) directory to include all files from. # includedir /etc/munin/munin-conf.d # Make graphs show values per minute instead of per second #graph_period minute # Graphics files are normaly generated by munin-graph, no matter if # the graphs are used or not. You can change this to # on-demand-graphing by following the instructions...