Bash занимает много времени, чтобы загрузить

7

Поэтому, когда я открываю терминал (ctrl + alt + t), на приглашение, которое требуется показать, требуется около 6 секунд, и я могу наблюдать (сверху вниз на другом терминале), что он берет 99% процессора, чтобы сделать это .

Что может быть причиной этого? Он загрузился мгновенно раньше.

Я запускаю Ubuntu 13.04, мой процессор - это ядро ​​Intel i7-2600K @ 3.4GHz, и у меня 16 ГБ оперативной памяти.

~ / .profile:

# ~/.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 PATH=/usr/local/cuda-5.0/bin:$PATH

export LD_LIBRARY_PATH=/usr/local/cuda-5.0/lib:/usr/local/cuda-5.0/lib64:$LD_LIBRARY_PATH

export PS1="\e[0;31m[\[email protected]\h \W]\$ \e[m"

~ / Bashrc:

# ~/.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
[ -z "$PS1" ] && return

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)
[ -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)
case "$TERM" in
    xterm-color) 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

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)}\[3[01;32m\]\[email protected]\h\[3[00m\]:\[3[01;34m\]\w\[3[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\[email protected]\h:\w\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to [email protected]:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\[email protected]\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

# enable color support of ls and also add handy aliases
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

# some more ls aliases
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'

# Add an "alert" alias for long running commands.  Use like so:
#   sleep 10; alert
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.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

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).
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
    . /etc/bash_completion
fi

export PATH=$PATH:/usr/local/cuda-5.0/bin
export LD_LIBRARY_PATH=/usr/local/cuda-5.0/lib64:/lib
export PATH=$PATH:~/bin

bash -v output:

# System-wide .bashrc file for interactive bash(1) shells.

# To enable the settings / commands in this file for login shells as well,
# this file has to be sourced in /etc/profile.

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# 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, overwrite the one in /etc/profile)
PS1='${debian_chroot:+($debian_chroot)}\[email protected]\h:\w\$ '

# Commented out, don't overwrite xterm -T "title" -n "icontitle" by default.
# If this is an xterm set the title to [email protected]:dir
#case "$TERM" in
#xterm*|rxvt*)
#    PROMPT_COMMAND='echo -ne "3]0;${USER}@${HOSTNAME}: ${PWD}
+ /home/miguel/.bashrc:10:HISTCONTROL=ignoreboth
+ /home/miguel/.bashrc:13:shopt -s histappend
+ /home/miguel/.bashrc:16:HISTSIZE=1000
+ /home/miguel/.bashrc:17:HISTFILESIZE=2000
7"' # ;; #*) # ;; #esac # enable bash completion in interactive shells #if ! shopt -oq posix; then # if [ -f /usr/share/bash-completion/bash_completion ]; then # . /usr/share/bash-completion/bash_completion # elif [ -f /etc/bash_completion ]; then # . /etc/bash_completion # fi #fi # sudo hint if [ ! -e "$HOME/.sudo_as_admin_successful" ] && [ ! -e "$HOME/.hushlogin" ] ; then case " $(groups) " in *\ admin\ *) if [ -x /usr/bin/sudo ]; then cat <<-EOF To run a command as administrator (user "root"), use "sudo <command>". See "man sudo_root" for details. EOF fi esac fi groups) " groups) groups # if the command-not-found package is installed, use it if [ -x /usr/lib/command-not-found -o -x /usr/share/command-not-found/command-not-found ]; then function command_not_found_handle { # check because c-n-f could've been removed in the meantime if [ -x /usr/lib/command-not-found ]; then /usr/lib/command-not-found -- "$1" return $? elif [ -x /usr/share/command-not-found/command-not-found ]; then /usr/share/command-not-found/command-not-found -- "$1" return $? else printf "%s: command not found\n" "$1" >&2 return 127 fi } fi # ~/.bashrc: executed by bash(1) for non-login shells. # see /usr/share/doc/bash/examples/startup-files (in the package bash-doc) # for examples # If not running interactively, don't do anything [ -z "$PS1" ] && return # don't put duplicate lines or lines starting with space in the history. # See bash(1) for more options HISTCONTROL=ignoreboth # append to the history file, don't overwrite it shopt -s histappend # for setting history length see HISTSIZE and HISTFILESIZE in bash(1) HISTSIZE=1000 HISTFILESIZE=2000 # check the window size after each command and, if necessary, # update the values of LINES and COLUMNS. shopt -s checkwinsize # If set, the pattern "**" used in a pathname expansion context will # match all files and zero or more directories and subdirectories. #shopt -s globstar # make less more friendly for non-text input files, see lesspipe(1) [ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" SHELL=/bin/sh lesspipe)" SHELL=/bin/sh lesspipe) SHELL=/bin/sh lesspipe export LESSOPEN="| /usr/bin/lesspipe %s"; export LESSCLOSE="/usr/bin/lesspipe %s %s"; # set variable identifying the chroot you work in (used in the prompt below) if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then debian_chroot=$(cat /etc/debian_chroot) fi # set a fancy prompt (non-color, unless we know we "want" color) case "$TERM" in xterm-color) 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 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)}\[3[01;32m\]\[email protected]\h\[3[00m\]:\[3[01;34m\]\w\[3[00m\]\$ ' else PS1='${debian_chroot:+($debian_chroot)}\[email protected]\h:\w\$ ' fi unset color_prompt force_color_prompt # If this is an xterm set the title to [email protected]:dir case "$TERM" in xterm*|rxvt*) PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\[email protected]\h: \w\a\]$PS1" ;; *) ;; esac # enable color support of ls and also add handy aliases if [ -x /usr/bin/dircolors ]; then test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)" alias ls='ls --color=auto' #alias dir='dir --color=auto' #alias vdir='vdir --color=auto' alias grep='grep --color=auto' alias fgrep='fgrep --color=auto' alias egrep='egrep --color=auto' fi dircolors -b)" dircolors -b) dircolors -b LS_COLORS='rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:'; export LS_COLORS # some more ls aliases alias ll='ls -alF' alias la='ls -A' alias l='ls -CF' # Add an "alert" alias for long running commands. Use like so: # sleep 10; alert alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"' # Alias definitions. # You may want to put all your additions into a separate file like # ~/.bash_aliases, instead of adding them here directly. # See /usr/share/doc/bash-doc/examples in the bash-doc package. 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). if [ -f /etc/bash_completion ] && ! shopt -oq posix; then . /etc/bash_completion fi . /usr/share/bash-completion/bash_completion # -*- shell-script -*- # # bash_completion - programmable completion functions for bash 4.1+ # # Copyright © 2006-2008, Ian Macdonald <[email protected]> # © 2009-2011, Bash Completion Maintainers # <[email protected]> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software Foundation, # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. # # The latest version of this software can be obtained here: # # http://bash-completion.alioth.debian.org/ # # RELEASE: 1.99 if [[ $- == *v* ]]; then BASH_COMPLETION_ORIGINAL_V_VALUE="-v" else BASH_COMPLETION_ORIGINAL_V_VALUE="+v" fi if [[ ${BASH_COMPLETION_DEBUG-} ]]; then set -v else set +v fi unset BASH_COMPLETION_ORIGINAL_V_VALUE # ex: ts=4 sw=4 et filetype=sh export PATH=$PATH:/usr/local/cuda-5.0/bin export LD_LIBRARY_PATH=/usr/local/cuda-5.0/lib64:/lib export PATH=$PATH:~/bin

Когда я запускаю команду, предложенную geirha, вывод останавливается на пару секунд в следующих строках, я не знаю, указывают ли они на проблему.

%pr_e%     
задан Msegade 31.08.2013 в 02:10
источник

3 ответа

5

Скорее всего, это bash-завершение, требующее времени для загрузки. Попробуйте прокомментировать раздел, в котором источники / etc / bash-completion.

#if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
#    . /etc/bash_completion
#fi

И посмотри, получишь ли ты ускорение. Я тоже прокомментировал это из-за количества времени, необходимого для загрузки. Без этого вы просто получите стандартное завершение, которое в основном является завершением имени файла. То, что добавляет bash, - это завершение для таких вещей, как имена пакетов при вводе, например. apt-get install foo<tab> .

Если вы хотите увидеть все, что происходит, когда bash запускается в интерактивном режиме (без входа в систему), попробуйте:

PS4='+ $BASH_SOURCE:$LINENO:' bash -xic ''

ИЗМЕНИТЬ

Основываясь на дополнительной информации, представленной в вопросе и комментариях, выяснилось, что реальная проблема заключалась в том, что в файле истории были некоторые гигантские строки, на которые потребовалось время для чтения и анализа. Таким образом, решение в этом случае состоит в том, чтобы либо обрезать файл

> "$HISTFILE"

или вручную отредактируйте его и удалите гигантские строки.

    
ответ дан geirha 31.08.2013 в 13:55
2

Другое, что нужно проверить, это HISTSIZE

echo $HISTSIZE

Я нашел для больших чисел, это заставляет bash занять некоторое время, чтобы начать. Итак, теперь я установил его на 1000, что кажется разумным. Вы все равно можете сохранить свой HISTFILESIZE большой (мой на 200k).

мои полные настройки истории в .bashrc выглядят так:

# don't put duplicate lines or lines starting with space in the  history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000  
HISTFILESIZE=200000
    
ответ дан Andy Gelnar 17.02.2016 в 13:38
1

Переменная HISTFILE была для меня виновной.

Я побежал:

echo $HISTFILE 

, чтобы увидеть местоположение HISTFILE .

Затем я редактировал $HISTFILE в текстовом редакторе и занимал верхние строки и оставлял только последние 50 команд, которые кажутся мне много.

Я также установил следующие переменные в .bashrc , чтобы сохранить только последние 500 команд, а максимальный размер HISTFILE - 100 килобайт.

HISTSIZE=500  
HISTFILESIZE=100000
    
ответ дан Pankaj 13.04.2018 в 00:46