安装好用的rlwrap工具，在环境变量里添加如下，就能实现显示当前路径（目录），目录补全的方便功能
alias asmcmd='rlwrap -r -i asmcmd –p'
asmcmd>help打印全部命令，主要命令如下：
commands:
--------
md_backup, md_restore
lsattr, setattr
cd, cp, du, find, help, ls, lsct, lsdg, lsof, mkalias
mkdir, pwd, rm, rmalias
chdg, chkdg, dropdg, iostat, lsdsk, lsod, mkdg, mount
offline, online, rebal, remap, umount
dsget, dsset, lsop, shutdown, spbackup, spcopy, spget
spmove, spset, startup
chtmpl, lstmpl, mktmpl, rmtmpl
chgrp, chmod, chown, groups, grpmod, lsgrp, lspwusr, lsusr
mkgrp, mkusr, orapwusr, passwd, rmgrp, rmusr
volcreate, voldelete, voldisable, volenable, volinfo
volresize, volset, volstat
查看单个命令的用法，使用help command例如：
ASMCMD [+] > help lsattr
lsattr
Lists the attributes of a disk group.