Linux cp/rm/mv mandatory overwrite, linuxcp

Linux cp/rm/mv mandatory overwrite, linuxcp
1. cp/rm/mv force overwrite in Linux (1) and backslash (\) temporarily cancel alias

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

(2) unalias cancelling aliases

Note: This is only temporary cancellation of the cp alias, not permanent

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

(3) modify the default configuration file

• Enter the alias command to check that cp, mv, and rm-I are used in the system.

   [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'

• Modify ~ /. Bashrc, add the '#' comment before "alias cp = 'cp-I.

    [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

• Restart or execute source ~ /. Bashrc make the command take effect

(4) yes command + automatic pipe input yes

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

II. Implementation of Linux commands in the Java background

Public void copyIcon () throws IOException, InterruptedException {Runtime r = Runtime. getRuntime (); String pai_copy = "\ cp-rf temp/AppIcon/* icon /"; // copy and overwrite String [] cmds = new String [] {"sh", "-c", cmd_copy}; Process p = r.exe c (cmds ); int result = p. waitFor (); if (result = 0) {// indicates that the logger is terminated normally. error ("[copy appIcon succeeded]");} else {logger. error ("[copy appIcon failed]" + pai_copy );}}