hongbo-miao/hongbomiao.com

# Host (macOS)
parallels-desktop-show-ip:
    prlctl list --full
generate-ssh-key:
    ssh-keygen -t ed25519
copy-ssh-key-to-ubuntu:
    ssh-copy-id -i ~/.ssh/id_ed25519.pub parallels@10.211.55.4
ssh:
    ssh parallels@10.211.55.4

# Ubuntu
show-system-info:
    uname --all
show-ip:
    hostname --all-ip-addresses
show-usb-devices:
    lsusb
show-kernel-ring-buffer-messages:
    sudo dmesg
which:
    which xxx

# Install
apt-update:
    sudo apt update
apt-install:
    sudo apt --yes xxx
snap-install:
    sudo snap install htop

# Open file descriptor
show-open-file-descriptor-soft-limit:
    ulimit -n
show-open-file-descriptor-hard-limit:
    ulimit -n -H
set-open-file-descriptor-soft-limit:
    ulimit -n 102400

# CPU
show-cpu-cores:
    nproc
show-cpu-summary:
    lscpu
show-cpu-details:
    cat /proc/cpuinfo

# Disk
show-disk-free:
    df --human-readable
show-disk-usage:
    du --human-readable --max-depth=0 /home

# Network
show-network-live:
    vnstat --live 1 --style 4 --rateunit 0
show-network-hours:
    vnstat --hours
show-network-hoursgraph:
    vnstat --hoursgraph
show-dns:
    dig www.hongbomiao.com
show-dns-record-all:
    dig www.hongbomiao.com any
show-dns-record-nameserver:
    dig www.hongbomiao.com ns
test-ip-connectivity:
    ping www.hongbomiao.com
test-ssl-connectivity:
    openssl s_client -connect www.hongbomiao.com:443

# SSH
ssh-remove-host-key:
    ssh-keygen -R xxx.xxx.xxx.xxx

# File
ls-owner-group:
    ls -l
    ls -l file.txt

# https://github.com/quic-go/quic-go/wiki/UDP-Receive-Buffer-Size#non-bsd
increase-udp-receive-buffer:
    sysctl -w net.core.rmem_max=2500000

# Service
show-services-active:
    systemctl list-units --type=service --state=active
show-services-active-running:
    systemctl list-units --type=service --state=running
show-services-inactive:
    systemctl list-units --type=service --state=inactive
show-service-status:
    systemctl status xxx
show-service-log:
    journalctl --unit=xxx --lines=60 --no-pager
service-start:
    sudo systemctl start xxx
service-stop:
    sudo systemctl stop xxx
service-restart:
    sudo systemctl restart xxx
service-enable:
    sudo systemctl enable xxx
service-disable:
    sudo systemctl disable xxx

# History
history-show:
    history
history-clear:
    history -c

# Device
show-serial-devices:
    ls /dev/tty*

# GPG
gpg-private-key-list:
    gpg --list-secret-keys
gpg-public-key-list:
    gpg --list-keys
gpg-public-key-show:
    gpg --armor --export xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

# Debug
btop:
    btop
htop:
    htop