[root@fz ~]# \cp filename new/filename   
[root@fz ~]#

[root@localhost ~]# unalias cp   
[root@localhost ~]# cp filename new/filename   
[root@localhost ~]#

[root@fz ~]#
[root@fz ~]# alias
alias cdd='cd /home/data/android/'
alias cp='cp -i'
alias l='ls -la'
alias l.='ls -d .* --color=auto'
alias ll='ls -l --color=auto'
alias ls='ls --color=auto'
alias mv='mv -i'
alias rm='rm -i'
alias tf='tail -f '
alias vc='vim ~/.bash_profile'
alias vs='source ~/.bash_profile'
alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'

[root@fz test]# vi ~/.bashrc 
# .bashrc

# User specific aliases and functions

alias rm='rm -i'
#alias cp='cp -i'
alias mv='mv -i'

# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi

[root@fz ~]# yes | cp filename new/filename   
cp: overwrite `new/filename'? [root@localhost ~]#

public void copyIcon() throws IOException, InterruptedException {
      Runtime r = Runtime.getRuntime();
      String cmd_copy = "\\cp -rf temp/AppIcon/*  icon/";    //copy并覆盖
      String[] cmds = new String[]{"sh","-c",cmd_copy};
      Process p = r.exec(cmds);
      int result = p.waitFor();
      if (result == 0){   //表示正常结束
          logger.error("【copy appIcon 成功】");
      }else {
          logger.error("【copy appIcon 失败】"+cmd_copy);
      }
}