# Print total number of messages in all queues
rabbitmqctl list_queues | awk ‘{s+=$2} END {print s}’
# List all queues, sorted by number of queued messages in descending order
rabbitmqctl list_queues | sort -nr -k2 | less
head -c 1G /dev/zero | tail
openssl speed -multi $(nproc --all)
openssl speed -multi $(grep -ci processor /proc/cpuinfo)
find /some/path/ \( -type f -exec chmod a=r {} \; \) -o \( -type d -exec chmod a=rx {} \; \)
apt install php7.2-{mysql,curl,json,xsl,gd,xml,zip,xsl,soap,bcmath,mbstring,gettext,imagick}
wget wireguard-ui:
https://github.com/ngoduykhanh/wireguard-ui/releases
tar -xvzf wireguard-ui-*.tar.gz
mkdir /opt/wireguard-ui
mv wireguard-ui /opt/wireguard-ui/
vim /opt/wireguard-ui/.env
SESSION_SECRET=
WGUI_USERNAME=
WGUI_PASSWORD=
vim /opt/wireguard-ui/postup.sh
#!/usr/bin/bash
# /opt/wireguard-ui/postup.sh
ufw route allow in on wg0 out on eth0
iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE
vim /opt/wireguard-ui/postdown.sh
#!/usr/bin/bash
# /opt/wireguard-ui/postdown.sh
ufw route delete allow in on wg0 out on eth0
iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
chmod +x /opt/wireguard-ui/post*.sh
vim /etc/systemd/system/wireguard-ui-daemon.service
[Unit]
Description=WireGuard UI Daemon
Wants=network-online.target
After=network-online.target
[Service]
User=root
Group=root
Type=simple
systemctl daemon-reload
systemctl start wireguard-ui-daemon.service
vim /etc/systemd/system/wgui.service
[Unit]
Description=Restart WireGuard
After=network.target
[Service]
Type=oneshot
ExecStart=/usr/bin/systemctl restart [email protected]
[Install]
RequiredBy=wgui.path
vim /etc/systemd/system/wgui.path
[Unit]
Description=Watch /etc/wireguard/wg0.conf for changes
[Path]
PathModified=/etc/wireguard/wg0.conf
[Install]
WantedBy=multi-user.target
systemctl daemon-reload
systemctl enable wgui.{path,service}
systemctl start wgui.{path,service}
Nginx proxy:
add_header Cache-Control no-cache;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
proxy_pass http://127.0.0.1:5000/;
bin/kibana-setup --enrollment-token
Percona Monitoring and Management (PMM) is an open-source database monitoring, management, and observability solution for MySQL, PostgreSQL, and MongoDB.
mysqldump --routines --no-create-info --no-data --no-create-db --skip-opt my_db > ~/my_db_triggers.sql
journalctl --rotate
journalctl --vacuum-time=1s
awk match pattern in column
Grep only 502 && 503:
cat /var/log/nginx/access.log| awk '$9 ~ /^50[23]/'
Grep all 50X:
cat /var/log/nginx/access.log| awk '$9 ~ /^50./'
Pug is a high-performance template engine heavily influenced by HTML and implemented with JavaScript for Node.js and browsers. But there are ports for other languages like Java, Python, Ruby, etc.
arkade is how developers install the latest versions of their favourite tools and Kubernetes apps.
curl -sLS https://get.arkade.dev | sudo sh
arkade get kubectl
arkade get kubectl \
helm \
istioctl
actions-runner Install GitHub Actions Runner
buildkitd Install Buildkitd
cni Install CNI plugins
containerd Install containerd
firecracker Install Firecracker
gitlab-runner Install Gitlab Runner
go Install Go
node Install Node.js
prometheus Install Prometheus
tc-redirect-tap Install tc-redirect-tap
registry Install Open Source Registry implementation for storing and distributing container images using the OCI Distribution Specification
wget https://github.com/dunglas/mercure/releases/download/v0.10.2/mercure_0.10.2_Linux_x86_64.tar.gz && mkdir mercure && tar -zxvf mercure_0.10.2_Linux_x86_64.tar.gz -C mercure
vim /etc/supervisor/conf.d/mercure.conf
[program:mercure]
command=/usr/sbin/mercure
process_name=%(program_name)s_%(process_num)s
numprocs=1
environment=JWT_KEY=”secret_jwt_key”,ADDR=’:3333′, DEMO=1, ALLOW_ANONYMOUS=1, CORS_ALLOWED_ORIGINS=, PUBLISH_ALLOWED_ORIGINS=”, USE_FORWARDED_HEADERS=1, DEBUG=1
directory=/tmp
autostart=true
autorestart=true
startsecs=5
startretries=10
user=www-data
redirect_stderr=false
stdout_capture_maxbytes=1MB
stderr_capture_maxbytes=1MB
stdout_logfile=/path/to/mercure/out.log
stderr_logfile=/path/to/mercure/error.log
supervisorctl reread
supervisorctl update
supervisorctl start mercure
Generate token online here: www.JWT.io
You need use your secret_jwt_key to get token
{
“mercure”: {
“publish”: [
“*”
]
}
}
Test token bash script:
#!/usr/bin/env bash
curl –request POST \
–url http://127.0.0.1:3333/.well-known/mercure \
–header ‘authorization: Bearer Paste_your_generated_token_here’ \
–header ‘content-type: application/x-www-form-urlencoded’ \
–data topic=test \
–data ‘data={
“headline”: “Hello there this is Mercure.Rocks”
}’
nsenter -t $(cat /var/snap/lxd/common/lxd.pid) -m