ubuntu 系统 /etc/profile, ~/.profile, ~/.bashrc, ~/.bash_logout,~/.bash_history 文件的内容及解析

今天在ubuntu下安装了jdk

各文件的内容:

~/.profile 文件中内容:

# ~/.profile: executed by the command interpreter for login shells.

# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login

# exists.

# see /usr/share/doc/bash/examples/startup-files for examples.

# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask

# for ssh logins, install and configure the libpam-umask package.

#umask 022

# if running bash

if [ -n "$BASH_VERSION" ]; then

    # include .bashrc if it exists

    if [ -f "$HOME/.bashrc" ]; then

    . "$HOME/.bashrc"

    fi

fi

# set PATH so it includes user's private bin if it exists

if [ -d "$HOME/bin" ] ; then

    PATH="$HOME/bin:$PATH"

fi

export LANGUAGE="en"

export LANG="en_US.utf8"

======================================================

etc/profile 文件中内容:
# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))

# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ -d /etc/profile.d ]; then

  for i in /etc/profile.d/*.sh; do

    if [ -r $i ]; then

      . $i

    fi

  done

  unset i

fi

if [ "$PS1" ]; then

  if [ "$BASH" ]; then

    PS1='\u@\h:\w\$ '

    if [ -f /etc/bash.bashrc ]; then

    . /etc/bash.bashrc

    fi

  else

    if [ "`id -u`" -eq 0 ]; then

      PS1='# '

    else

      PS1='$ '

    fi

  fi

fi

umask 022

=======================================================

~/.bashrc 文件中内容:

<空文件>

========================================================

~/.bash_logout 文件中内容:

<空文件>

========================================================

~/.bash_history文件中内容:

<空文件>