Shadowsocks launch functions which can be included by `source terminal_launch.sh` or by put this script in auto-start scripts such as `.bashrc`

terminal_launch.sh

# Return (echo) last ss-local task
proxy_task() {
    echo `ps -u $USER | grep "ss-local"`
}

proxy_status() {
    if [ -z "`proxy_task`" ]; then
        echo "Disabled"
    else
        echo "Enabled"
    fi
}

enable_proxy() {
    # Set proxy log file
    proxy_log_file="$HOME/.proxy_work.log"
    
    # Set socks configs list
    ss_configs[0]="shadowsocks.config0"
    ss_configs[1]="shadowsocks.config0"

    # Disable proxy if ss-local was started before
    if [ ! -z "`proxy_task`" ]; then
        echo Disable previous proxy
        disable_proxy
    fi

    # Choose one config
    config=${ss_configs[$(($RANDOM % ${#ss_configs[@]}))]}
    echo Chosen config: $config

    # Launch ss-local
    ss-local -c $config > $proxy_log_file &

    # Add `socks_proxy` env variable into /etc/environment to give access to proxy via `socks_proxy`
    echo Add proxy in /etc/environment
    printf "`cat /etc/environment`\nsocks_proxy=\"socks://localhost:1080/\"\n" | sudo tee /etc/environment >> /dev/null

    # Enable proxy settings in Gnome proxy
    echo Enable Gnome Proxy
    gsettings set org.gnome.system.proxy mode 'manual'
    gsettings set org.gnome.system.proxy.socks host localhost
    gsettings set org.gnome.system.proxy.socks port 1080
}

disable_proxy() {
    # Get task info for ss-local
    task=`proxy_task`

    task_number=`echo $task | grep -o "^[0-9]*"`
    
    # If task is empty - task was not added and we must not do anything
    if [ ! -z "$task_number" ]; then
        echo Task: $task
        echo Task number: $task_number

        # Kill oldest task
        kill $task_number
        echo Killed
    else
        echo Proxy task was not found
    fi
    # Remove `socks_proxy` from `/etc/environment`
    echo Clear /etc/environment
    environment=`cat /etc/environment | grep -v socks_proxy`
    echo "$environment" | sudo tee /etc/environment >> /dev/null
    
    # Disable proxy settings in Gnome proxy
    echo Disable Gnome Proxy
    gsettings reset org.gnome.system.proxy.socks host
    gsettings reset org.gnome.system.proxy.socks port
    gsettings reset org.gnome.system.proxy mode
}