ethereum docker geth shell for geth attach and tail log

Help use docker geth for geth attach and watch log. Geth Command line path need to change for yourself env.

#!/bin/sh
IFS=$'\n'
echo $1
echo $2

case $2 in
    attach) docker exec -it $(docker ps -a --no-trunc  | grep $1 | awk '{print $1}') geth attach --datadir=/root/.ethereum/devchain
        ;;
    log) docker exec -it $(docker ps -a --no-trunc  | grep $1 | awk '{print $1}') tail -n 30 -f /root/geth.log
        ;;
    sh) docker exec -it $(docker ps -a --no-trunc  | grep $1 | awk '{print $1}') sh
        ;;
    bash) docker exec -it $(docker ps -a --no-trunc  | grep $1 | awk '{print $1}') bash
        ;;
    *)  echo "command parms1: docker container name"
        echo "command parms2: attach (geth attach) or log (tail -n 30 -f) or sh or bash"
esac

bash linux

    # General Aliases
    alias apk='apk --progress'
    alias ll="ls -ltan"

    alias hosts='cat /etc/hosts'
    alias ..="cd .."
    alias ...="cd ../.."
    alias ....="cd ../../.."
    alias untar="tar xzvkf"
    alias mv="mv -nv"
    alias cp="cp -i"
    alias ip4="ip -4 addr"
    alias ip6="ip -6 addr"

    COL_YEL="\[\e[1;33m\]"
    COL_GRA="\[\e[0;37m\]"
    COL_WHI="\[\e[1;37m\]"
    COL_GRE="\[\e[1;32m\]"
    COL_RED="\[\e[1;31m\]"

    # Bash Prompt
    if test "$UID" -eq 0 ; then
        _COL_USER=$COL_RED
        _p=" #"
    else
        _COL_USER=$COL_GRE
        _p=">"
    fi
    COLORIZED_PROMPT="${_COL_USER}\u${COL_WHI}@${COL_YEL}\h${COL_WHI}:\w${_p} \[\e[m\]"
    case $TERM in
        *term | rxvt | screen )
            PS1="${COLORIZED_PROMPT}\[\e]0;\u@\h:\w\007\]" ;;
        linux )
            PS1="${COLORIZED_PROMPT}" ;;
        * ) 
            PS1="\u@\h:\w${_p} " ;;
    esac