Erlang集群管理系统中遇到的一些小问题

erlang节点之间的文件传输
# file:read_file/write_file

XML解析
# xmerl

Erlang中字符串的处理
# string
# io_lib
# re
# lists

when I start erl in the terminal as root, there is a warning:

'no display name and no $DISPLAY environment variable'.

# export DISPLAY=:0.0

1> tv:start().
<0.34.0>
2> No protocol specified
                        Application initialization failed: couldn't connect to display ":0"
No protocol specified
                     Error in startup script: couldn't connect to display ":0"
    while executing
"load /usr/lib/libtk8.4.so.0 Tk"
    ("package ifneeded" script)
    invoked from within
"package require Tk 8.3"
    (file "/usr/local/lib/erlang/lib/gs-1.5.11/priv/gstk.tcl" line 7)


Try merging Xauthority file first:
> sudo xauth -f /root/.Xauthority merge .Xauthority

Now you can run gui as root
> sudo gui