# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples
# If not running interactively, don't do anything
# 如果没有交互运行，就不要做任何事情
case $- in
*i*) ;;
*) return;;
esac
# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
# 不要在历史中放置重复的行或以空格开头的行。
# 有关更多选项，请参见bash(1)
HISTCONTROL=ignoreboth
# append to the history file, don't overwrite it
# 追加到历史文件，不要覆盖它, 开启histappend
shopt -s histappend
# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
# 要设置历史长度，请参见bash(1)中的HISTSIZE和HISTFILESIZE
HISTSIZE=1000
HISTFILESIZE=2000
# check the window size after each command and, if necessary,
# 检查每个命令之后的窗口大小，如果需要，
# update the values of LINES and COLUMNS.
# 更新行和列的值。
shopt -s checkwinsize ## 开启checkinsize选项
# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
# 如果设置了，路径名扩展上下文中使用的模式“**”将匹配所有文件和零个或多个目录和子目录。
#shopt -s globstar
# make less more friendly for non-text input files, see lesspipe(1)
# 使非文本输入文件不那么友好，请参见lesspipe(1)
# && 运算符，如果前面是真则执行后面的语句，如果前面为假则不执行
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"
# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
debian_chroot=$(cat /etc/debian_chroot)
fi
# set a fancy prompt (non-color, unless we know we "want" color)
# 设置一个花哨的提示符(非彩色，除非我们知道我们“想要”颜色)
case "$TERM" in
xterm-color|*-256color) color_prompt=yes;;
esac
# uncomment for a colored prompt, if the terminal has the capability; turned off by default to not distract the user: the focus in a terminal window should be on the output of commands, not on the prompt force_color_prompt=yes
# 如果终端有能力取消有色提示符的注释;默认情况下关闭，以避免分散用户的注意力:终端窗口中的焦点应该放在命令的输出上，而不是提示符force_color_prompt=yes
if [ -n "$force_color_prompt" ]; then
if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
# We have color support; assume it's compliant with Ecma-48
# (ISO/IEC-6429). (Lack of such support is extremely rare, and such
# a case would tend to support setf rather than setaf.)
color_prompt=yes
else
color_prompt=
fi
fi
if [ "$color_prompt" = yes ]; then
PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt
# If this is an xterm set the title to user@host:dir
# 如果这是一个xterm，则将标题设置为user@host:dir
case "$TERM" in
xterm*|rxvt*)
PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
;;
*)
;;
esac
# enable color support of ls and also add handy aliases
# 启用ls的颜色支持，并添加方便的别名
if [ -x /usr/bin/dircolors ]; then
test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
alias ls='ls --color=auto'
#alias dir='dir --color=auto'
#alias vdir='vdir --color=auto'
alias grep='grep --color=auto'
alias fgrep='fgrep --color=auto'
alias egrep='egrep --color=auto'
fi
# colored GCC warnings and errors
# 彩色GCC警告和错误
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'
# some more ls aliases
# 更多ls的别名
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'
# Add an "alert" alias for long running commands. Use like so:
# 为长时间运行的命令添加一个“alert”别名。使用像这样:
# sleep 10; alert
# 睡眠10;警报
alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'
# Alias definitions.
# 别名定义。
# You may want to put all your additions into a separate file like
# 您可能希望将所有添加的内容放入一个单独的文件中，比如
# ~/.bash_aliases, instead of adding them here directly.
# ~ /。bash_aliases，而不是直接在这里添加它们。
# See /usr/share/doc/bash-doc/examples in the bash-doc package.
# 请参阅bash-doc包中的/usr/share/doc/bash-doc/示例。
if [ -f ~/.bash_aliases ]; then
. ~/.bash_aliases
fi
# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
# 启用可编程完成功能(如果已经在/etc/bash.中启用，则不需要在bashrc和/etc/profile (sources /etc/bash.bashrc)启用此功能
# 如果下面的代码注释了，那么Ubuntu系统Tab键不能自动补全
if ! shopt -oq posix; then
if [ -f /usr/share/bash-completion/bash_completion ]; then
. /usr/share/bash-completion/bash_completion
elif [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi
fi