问题[prompt](ubuntu)

我有一个小功能，我保留在我的个人资料中，让我可以快速访问一些配置文件：

viconf ()
{
    COLUMNS=12;
    printf "Edit config file:\n\n";
    select x in ~/.bashrc ~/.bash_profile ~/.bash_login ~/.profile ~/.inputrc ~/.vimrc;
    do
        vim $x;
        break;
    done
}

它创建这样的输出：

1) /home/boss/.bashrc
2) /home/boss/.bash_profile
3) /home/boss/.bash_login
4) /home/boss/.profile
5) /home/boss/.inputrc
6) /home/boss/.vimrc
#? 

我对此并不满意。我希望#?有一个\n然后说Select a config file to edit with vi?。我尝试了很多编辑方法，PS3但我尝试的一切都未能实现这一点（特别是\n总是失败）。如何使我的函数具有自定义提示？

我的操作系统：Ubuntu 18.04.5 LTS

我使用跟踪来对脚本进行故障排除。我注意到跟踪中的不同行为取决于我的设置方式。我想了解它为什么会这样。

我通常set -x在我的脚本中使用我需要进行跟踪的地方激活跟踪。然而，提示字符串 PS4（默认为“+”）似乎“重复”了自身。

如果我在shebang中主动追踪#！行，PS4 只打印一次。

同样，如果我bash直接调用运行我的脚本，并-x在命令行中指定，PS4 也只打印一次。

为什么set -x在第一个示例中表现不同？我想shell有一些基本的东西我没有在这里......

如何按照以下方式制作别名：

命令行 bash bashrc 提示 ps1

alias=PS1="\d \h $ "

这显然是行不通的。从文件中进行分配有什么技巧吗？.bash_aliases

我也试过：

alias ps='PS1 $(\d \h $)'

我在 Kubuntu 20.04 上，并且已经有一段时间了，因为我注意到即使在我输入快捷方式后 konsole 终端快速启动，命令提示符本身也需要几秒钟才能出现在屏幕上，以便我可以开始输入. 它通常发生在我第一次在会话中启动它时，但它可能会在一段时间后再次发生。

有没有人知道可能发生的事情？提前致谢。

几年前我做了一个ps1提示。花了一些时间来配置它，现在升级后它不再起作用了。

.bashprompt 脚本（与 git-sh-prompt 一起加载到我的 .bashrc 中）它将检查正在显示的图标并更新颜色（通过 if 语句）。它将为每个状态显示带有不同图标的分支，并为每个语句显示不同的分支文本颜色。

目前没有显示 git 分支信息。除非我放入原始命令 __git_ps1。

我已经看到 git 将其 git-sh-prompt 放入 /usr/lib/git-core 所以我将 .bashrc 文件更改为指向那里，而我的 gitprompt 则指向那里。仍然没有变化。

这是代码。

###file##### .bashprompt ####

#!/bin/sh

# store colors
MAGENTA="\[\033[0;35m\]"
YELLOW="\[\033[038;5;154m\]"
BLUE="\[\033[038;5;33m\]"
LIGHT_GRAY="\[\033[0;37m\]"
CYAN="\[\033[038;5;51m\]"
GREEN="\[\033[00;32m\]"
RED="\[\033[38;5;160m\]"
VIOLET="\[\033[01;35m\]"
GREY="\[\033[038;5;234m\]"
BROWN="\[\033[038;5;130m\]"
ORANGE="\[\033[038;5;208m\]"

#Build PS1
function color_my_prompt {
  local __braceL="$BLUE["
  local __braceR="$BLUE]"
  local __cur_location="\W"
  local __location="\w"
  local __git_branch=
  local __prompt_tail="$BLUE➜"
  local __user_input_color="$LIGHT_GRAY"
  local __user="$BLUE[$YELLOW \u@\h $BLUE]"
  local __dollar="$YELLOW$"
  local _ip_add="$BLUE[$YELLOW $(ip addr | grep -w inet | gawk '{if (NR==2) {$0=$2; gsub(/\//," "); print $1;}}')$BLUE ]"
  local __returnLine="\n \n"
 # $BLUE\n$BLUE └─ "
 # colour branch name depending on state
  # if repository is dirty

 # local __filesCheck="$(/bin/ls -m | /usr/bin/wc -l | /bin/sed 's: ::g')"
#  local __minusNo="1"
# local __filesCalc="$(($__filesCheck-$__minusNo))"
 # local __filesReal="$__braceL $RED\$__filesCheck files $__braceR"

#  if [ "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = "true" ]; then
#    __git_branch=$(git symbolic-ref --quiet --short HEAD || git rev-parse --short HEAD)
#  fi
  if [[ "$(__git_ps1 "%s")" =~ "*" ]]; then     # if repository is dirty
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
      files="$__filesReal"
      __git_branch_color="$BROWN"
  elif [[ "$(__git_ps1 "%s")" =~ "+" ]]; then   # if there are staged files
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
      files="$__filesReal"
      __git_branch_color="$CYAN"
  elif [[ "$(__git_ps1 "%s")" =~ "Ŧ" ]]; then   # if there are only untracked files
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
      files="$__filesReal"
      __git_branch_color="$RED"
  elif [[ "$(__git_ps1 "%s")" =~ "Š" ]]; then   # if there is something stashed
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
      files="$__filesReal"
      __git_branch_color="$GREEN"
  elif [[ "$(__git_ps1 "%s")" =~ "↩" ]]; then   # if behind
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
      files="$__filesReal"
      __git_branch_color="$ORANGE"
  elif [[ "$(__git_ps1 "%s")" =~ "↪" ]]; then   # if there are commiting files
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
        files="$__filesReal"
      __git_branch_color="$MAGENTA"
  elif [[ "$(__git_ps1 "%s")" =~ "✔" ]]; then   # if it is equal to repo
      __git_branch="$__braceL $__git_branch_color$(__git_ps1 "%s") $__braceR"
      __files="$__filesReal"
      __git_branch_color="$YELLOW"
  fi
  # Compile the PS1

 PS1="\n $__user $_ip_add $__braceL $YELLOW$__cur_location $__braceR $__git_branch$__git_branch_color $__returnLine $__prompt_tail $__user_input_color "
#export PS1="${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u:\[\033[01;34m\]\w\[\033[00m\]\$(__git_ps1)\[\033[00m\] $ "
}
# configure PROMPT_COMMAND which is executed each time before PS1
export PROMPT_COMMAND=color_my_prompt

# if .git-prompt.sh exists, set options and execute it
if [ -f /usr/lib/git-core/git-sh-prompt ]; then
  GIT_PS1_SHOWDIRTYSTATE=true
  GIT_PS1_SHOWSTASHSTATE=true
  GIT_PS1_SHOWUNTRACKEDFILES=true
  GIT_PS1_SHOWUPSTREAM="auto"
  GIT_PS1_HIDE_IF_PWD_IGNORED=true
  GIT_PS1_SHOWCOLORHINTS=true
  GIT_PROMPT_SHOW_UNTRACKED_FILES=normal # can be no, normal or all; determines counting of untracked files
  . /usr/lib/git-core/git-sh-prompt
fi

source ~/.bashprompt/.bash_prompt
source /usr/lib/git-core/git-sh-prompt

我的 git-sh-prompt （它改变了 .bashprompt if 语句的图标）

    # bash/zsh git prompt support
#
# Copyright (C) 2006,2007 Shawn O. Pearce <[email protected]>
# Distributed under the GNU General Public License, version 2.0.
#
# This script allows you to see repository status in your prompt.
#
# To enable:
#
#    1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
#    2) Add the following line to your .bashrc/.zshrc:
#        source ~/.git-prompt.sh
#    3a) Change your PS1 to call __git_ps1 as
#        command-substitution:
#        Bash: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '
#        ZSH:  setopt PROMPT_SUBST ; PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
#        the optional argument will be used as format string.
#    3b) Alternatively, for a slightly faster prompt, __git_ps1 can
#        be used for PROMPT_COMMAND in Bash or for precmd() in Zsh
#        with two parameters, <pre> and <post>, which are strings
#        you would put in $PS1 before and after the status string
#        generated by the git-prompt machinery.  e.g.
#        Bash: PROMPT_COMMAND='__git_ps1 "\u@\h:\w" "\\\$ "'
#          will show username, at-sign, host, colon, cwd, then
#          various status string, followed by dollar and SP, as
#          your prompt.
#        ZSH:  precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
#          will show username, pipe, then various status string,
#          followed by colon, cwd, dollar and SP, as your prompt.
#        Optionally, you can supply a third argument with a printf
#        format string to finetune the output of the branch status
#
# The repository status will be displayed only if you are currently in a
# git repository. The %s token is the placeholder for the shown status.
#
# The prompt status always includes the current branch name.
#
# In addition, if you set GIT_PS1_SHOWDIRTYSTATE to a nonempty value,
# unstaged (*) and staged (+) changes will be shown next to the branch
# name.  You can configure this per-repository with the
# bash.showDirtyState variable, which defaults to true once
# GIT_PS1_SHOWDIRTYSTATE is enabled.
#
# You can also see if currently something is stashed, by setting
# GIT_PS1_SHOWSTASHSTATE to a nonempty value. If something is stashed,
# then a '$' will be shown next to the branch name.
#
# If you would like to see if there're untracked files, then you can set
# GIT_PS1_SHOWUNTRACKEDFILES to a nonempty value. If there're untracked
# files, then a '%' will be shown next to the branch name.  You can
# configure this per-repository with the bash.showUntrackedFiles
# variable, which defaults to true once GIT_PS1_SHOWUNTRACKEDFILES is
# enabled.
#
# If you would like to see the difference between HEAD and its upstream,
# set GIT_PS1_SHOWUPSTREAM="auto".  A "<" indicates you are behind, ">"
# indicates you are ahead, "<>" indicates you have diverged and "="
# indicates that there is no difference. You can further control
# behaviour by setting GIT_PS1_SHOWUPSTREAM to a space-separated list
# of values:
#
#     verbose       show number of commits ahead/behind (+/-) upstream
#     name          if verbose, then also show the upstream abbrev name
#     legacy        don't use the '--count' option available in recent
#                   versions of git-rev-list
#     git           always compare HEAD to @{upstream}
#     svn           always compare HEAD to your SVN upstream
#
# You can change the separator between the branch name and the above
# state symbols by setting GIT_PS1_STATESEPARATOR. The default separator
# is SP.
#
# By default, __git_ps1 will compare HEAD to your SVN upstream if it can
# find one, or @{upstream} otherwise.  Once you have set
# GIT_PS1_SHOWUPSTREAM, you can override it on a per-repository basis by
# setting the bash.showUpstream config variable.
#
# If you would like to see more information about the identity of
# commits checked out as a detached HEAD, set GIT_PS1_DESCRIBE_STYLE
# to one of these values:
#
#     contains      relative to newer annotated tag (v1.6.3.2~35)
#     branch        relative to newer tag or branch (master~4)
#     describe      relative to older annotated tag (v1.6.3.1-13-gdd42c2f)
#     tag           relative to any older tag (v1.6.3.1-13-gdd42c2f)
#     default       exactly matching tag
#
# If you would like a colored hint about the current dirty state, set
# GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
# the colored output of "git status -sb" and are available only when
# using __git_ps1 for PROMPT_COMMAND or precmd.
#
# If you would like __git_ps1 to do nothing in the case when the current
# directory is set up to be ignored by git, then set
# GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
# repository level by setting bash.hideIfPwdIgnored to "false".

# check whether printf supports -v
__git_printf_supports_v=
printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1

# stores the divergence from upstream in $p
# used by GIT_PS1_SHOWUPSTREAM
__git_ps1_show_upstream ()
{
    local key value
    local svn_remote svn_url_pattern count n
    local upstream=git legacy="" verbose="" name=""

    svn_remote=()
    # get some config options from git-config
    local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
    while read -r key value; do
        case "$key" in
        bash.showupstream)
            GIT_PS1_SHOWUPSTREAM="$value"
            if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
                p=""
                return
            fi
            ;;
        svn-remote.*.url)
            svn_remote[$((${#svn_remote[@]} + 1))]="$value"
            svn_url_pattern="$svn_url_pattern\\|$value"
            upstream=svn+git # default upstream is SVN if available, else git
            ;;
        esac
    done <<< "$output"

    # parse configuration values
    for option in ${GIT_PS1_SHOWUPSTREAM}; do
        case "$option" in
        git|svn) upstream="$option" ;;
        verbose) verbose=1 ;;
        legacy)  legacy=1  ;;
        name)    name=1 ;;
        esac
    done

    # Find our upstream
    case "$upstream" in
    git)    upstream="@{upstream}" ;;
    svn*)
        # get the upstream from the "git-svn-id: ..." in a commit message
        # (git-svn uses essentially the same procedure internally)
        local -a svn_upstream
        svn_upstream=($(git log --first-parent -1 \
                    --grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
        if [[ 0 -ne ${#svn_upstream[@]} ]]; then
            svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
            svn_upstream=${svn_upstream%@*}
            local n_stop="${#svn_remote[@]}"
            for ((n=1; n <= n_stop; n++)); do
                svn_upstream=${svn_upstream#${svn_remote[$n]}}
            done

            if [[ -z "$svn_upstream" ]]; then
                # default branch name for checkouts with no layout:
                upstream=${GIT_SVN_ID:-git-svn}
            else
                upstream=${svn_upstream#/}
            fi
        elif [[ "svn+git" = "$upstream" ]]; then
            upstream="@{upstream}"
        fi
        ;;
    esac

    # Find how many commits we are ahead/behind our upstream
    if [[ -z "$legacy" ]]; then
        count="$(git rev-list --count --left-right \
                "$upstream"...HEAD 2>/dev/null)"
    else
        # produce equivalent output to --count for older versions of git
        local commits
        if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
        then
            local commit behind=0 ahead=0
            for commit in $commits
            do
                case "$commit" in
                "↩ "*) ((behind++)) ;;
                *)    ((ahead++))  ;;
                esac
            done
            count="$behind  $ahead"
        else
            count=""
        fi
    fi

    # calculate the result
    if [[ -z "$verbose" ]]; then
        case "$count" in
        "") # no upstream
            p="" ;;
        "0  0") # equal to upstream
            p=" \[\033[00;32m\]✔" ;;
        "0  "*) # ahead of upstream
            p=" ↪" ;;
        *"  0") # behind upstream
            p=" ↩" ;;
        *)      # diverged from upstream
            p=" ✘" ;;
        esac
    else
        case "$count" in
        "") # no upstream
            p="" ;;
        "0  0") # equal to upstream
            p=" u=" ;;
        "0  "*) # ahead of upstream
            p=" u+${count#0 }" ;;
        *"  0") # behind upstream
            p=" u-${count%  0}" ;;
        *)      # diverged from upstream
            p=" u+${count#* }-${count%  *}" ;;
        esac
        if [[ -n "$count" && -n "$name" ]]; then
            __git_ps1_upstream_name=$(git rev-parse \
                --abbrev-ref "$upstream" 2>/dev/null)
            if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
                p="$p \${__git_ps1_upstream_name}"
            else
                p="$p ${__git_ps1_upstream_name}"
                # not needed anymore; keep user's
                # environment clean
                unset __git_ps1_upstream_name
            fi
        fi
    fi

}

# Helper function that is meant to be called from __git_ps1.  It
# injects color codes into the appropriate gitstring variables used
# to build a gitstring.
__git_ps1_colorize_gitstring ()
{
    if [[ -n ${ZSH_VERSION-} ]]; then
        local c_red='%F{red}'
        local c_green='%F{green}'
        local c_lblue='%F{blue}'
        local c_clear='%f'
    else
        # Using \[ and \] around colors is necessary to prevent
        # issues with command line editing/browsing/completion!
        local c_red='\[\e[31m\]'
        local c_green='\[\e[32m\]'
        local c_lblue='\[\e[1;34m\]'
        local c_clear='\[\e[0m\]'
            local c_yellow='\e[38;5;154m\]'
        fi
    local bad_color=$c_red
    local ok_color=$c_green
    local flags_color="$c_lblue"

    local branch_color=""
    if [ $detached = no ]; then
        branch_color="$ok_color"
    else
        branch_color="$bad_color"
    fi
    c="$branch_color$c"

    z="$c_clear$z"
    if [ "$w" = "*" ]; then
        w="$bad_color$w"
    fi
    if [ -n "$i" ]; then
        i="$ok_color$i"
    fi
    if [ -n "$s" ]; then
        s="$flags_color$s"
    fi
    if [ -n "$u" ]; then
        u="$bad_color$u"
    fi
    r="$c_clear$r"
}

# Helper function to read the first line of a file into a variable.
# __git_eread requires 2 arguments, the file path and the name of the
# variable, in that order.
__git_eread ()
{
    test -r "$1" && IFS=$'\r\n' read "$2" <"$1"
}

# see if a cherry-pick or revert is in progress, if the user has committed a
# conflict resolution with 'git commit' in the middle of a sequence of picks or
# reverts then CHERRY_PICK_HEAD/REVERT_HEAD will not exist so we have to read
# the todo file.
__git_sequencer_status ()
{
    local todo
    if test -f "$g/CHERRY_PICK_HEAD"
    then
        r="|CHERRY-PICKING"
        return 0;
    elif test -f "$g/REVERT_HEAD"
    then
        r="|REVERTING"
        return 0;
    elif __git_eread "$g/sequencer/todo" todo
    then
        case "$todo" in
        p[\ \   ]|pick[\ \  ]*)
            r="|CHERRY-PICKING"
            return 0
        ;;
        revert[\ \  ]*)
            r="|REVERTING"
            return 0
        ;;
        esac
    fi
    return 1
}

# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
# when called from PS1 using command substitution
# in this mode it prints text to add to bash PS1 prompt (includes branch name)
#
# __git_ps1 requires 2 or 3 arguments when called from PROMPT_COMMAND (pc)
# in that case it _sets_ PS1. The arguments are parts of a PS1 string.
# when two arguments are given, the first is prepended and the second appended
# to the state string when assigned to PS1.
# The optional third parameter will be used as printf format string to further
# customize the output of the git-status string.
# In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
__git_ps1 ()
{
    # preserve exit status
    local exit=$?
    local pcmode=no
    local detached=no
    local ps1pc_start='\u@\h:\w '
    local ps1pc_end='\$ '
    local printf_format=' (%s)'

    case "$#" in
        2|3)    pcmode=yes
            ps1pc_start="$1"
            ps1pc_end="$2"
            printf_format="${3:-$printf_format}"
            # set PS1 to a plain prompt so that we can
            # simply return early if the prompt should not
            # be decorated
            PS1="$ps1pc_start$ps1pc_end"
        ;;
        0|1)    printf_format="${1:-$printf_format}"
        ;;
        *)  return $exit
        ;;
    esac

    # ps1_expanded:  This variable is set to 'yes' if the shell
    # subjects the value of PS1 to parameter expansion:
    #
    #   * bash does unless the promptvars option is disabled
    #   * zsh does not unless the PROMPT_SUBST option is set
    #   * POSIX shells always do
    #
    # If the shell would expand the contents of PS1 when drawing
    # the prompt, a raw ref name must not be included in PS1.
    # This protects the user from arbitrary code execution via
    # specially crafted ref names.  For example, a ref named
    # 'refs/heads/$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)' might cause the
    # shell to execute 'sudo rm -rf /' when the prompt is drawn.
    #
    # Instead, the ref name should be placed in a separate global
    # variable (in the __git_ps1_* namespace to avoid colliding
    # with the user's environment) and that variable should be
    # referenced from PS1.  For example:
    #
    #     __git_ps1_foo=$(do_something_to_get_ref_name)
    #     PS1="...stuff...\${__git_ps1_foo}...stuff..."
    #
    # If the shell does not expand the contents of PS1, the raw
    # ref name must be included in PS1.
    #
    # The value of this variable is only relevant when in pcmode.
    #
    # Assume that the shell follows the POSIX specification and
    # expands PS1 unless determined otherwise.  (This is more
    # likely to be correct if the user has a non-bash, non-zsh
    # shell and safer than the alternative if the assumption is
    # incorrect.)
    #
    local ps1_expanded=yes
    [ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
    [ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no

    local repo_info rev_parse_exit_code
    repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
        --is-bare-repository --is-inside-work-tree \
        --short HEAD 2>/dev/null)"
    rev_parse_exit_code="$?"

    if [ -z "$repo_info" ]; then
        return $exit
    fi

    local short_sha=""
    if [ "$rev_parse_exit_code" = "0" ]; then
        short_sha="${repo_info##*$'\n'}"
        repo_info="${repo_info%$'\n'*}"
    fi
    local inside_worktree="${repo_info##*$'\n'}"
    repo_info="${repo_info%$'\n'*}"
    local bare_repo="${repo_info##*$'\n'}"
    repo_info="${repo_info%$'\n'*}"
    local inside_gitdir="${repo_info##*$'\n'}"
    local g="${repo_info%$'\n'*}"

    if [ "true" = "$inside_worktree" ] &&
       [ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
       [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
       git check-ignore -q .
    then
        return $exit
    fi

    local r=""
    local b=""
    local step=""
    local total=""
    if [ -d "$g/rebase-merge" ]; then
        __git_eread "$g/rebase-merge/head-name" b
        __git_eread "$g/rebase-merge/msgnum" step
        __git_eread "$g/rebase-merge/end" total
        if [ -f "$g/rebase-merge/interactive" ]; then
            r="|REBASE-i"
        else
            r="|REBASE-m"
        fi
    else
        if [ -d "$g/rebase-apply" ]; then
            __git_eread "$g/rebase-apply/next" step
            __git_eread "$g/rebase-apply/last" total
            if [ -f "$g/rebase-apply/rebasing" ]; then
                __git_eread "$g/rebase-apply/head-name" b
                r="|REBASE"
            elif [ -f "$g/rebase-apply/applying" ]; then
                r="|AM"
            else
                r="|AM/REBASE"
            fi
        elif [ -f "$g/MERGE_HEAD" ]; then
            r="|MERGING"
        elif __git_sequencer_status; then
            :
        elif [ -f "$g/BISECT_LOG" ]; then
            r="|BISECTING"
        fi

        if [ -n "$b" ]; then
            :
        elif [ -h "$g/HEAD" ]; then
            # symlink symbolic ref
            b="$(git symbolic-ref HEAD 2>/dev/null)"
        else
            local head=""
            if ! __git_eread "$g/HEAD" head; then
                return $exit
            fi
            # is it a symbolic ref?
            b="${head#ref: }"
            if [ "$head" = "$b" ]; then
                detached=yes
                b="$(
                case "${GIT_PS1_DESCRIBE_STYLE-}" in
                (contains)
                    git describe --contains HEAD ;;
                (branch)
                    git describe --contains --all HEAD ;;
                (tag)
                    git describe --tags HEAD ;;
                (describe)
                    git describe HEAD ;;
                (* | default)
                    git describe --tags --exact-match HEAD ;;
                esac 2>/dev/null)" ||

                b="$short_sha..."
                b="($b)"
            fi
        fi
    fi

    if [ -n "$step" ] && [ -n "$total" ]; then
        r="$r $step/$total"
    fi

    local w=""
    local i=""
    local s=""
    local u=""
    local c=""
    local p=""

    if [ "true" = "$inside_gitdir" ]; then
        if [ "true" = "$bare_repo" ]; then
            c="BARE:"
        else
            b="GIT_DIR!"
        fi
    elif [ "true" = "$inside_worktree" ]; then
        if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
           [ "$(git config --bool bash.showDirtyState)" != "false" ]
        then
            git diff --no-ext-diff --quiet || w="\e[38;5;154m\]★"
            git diff --no-ext-diff --cached --quiet || i="\e[38;5;154m\] +"
            if [ -z "$short_sha" ] && [ -z "$i" ]; then
                i="#"
            fi
        fi
        if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
           git rev-parse --verify --quiet refs/stash >/dev/null
        then
            s=" \e[38;5;154m\]S"
        fi

        if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
           [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
           git ls-files --others --exclude-standard --directory --no-empty-directory --error-unmatch -- ':/*' >/dev/null 2>/dev/null
        then
            u=" \e[38;5;154m\]Ŧ${ZSH_VERSION+%}"
        fi

        if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
            __git_ps1_show_upstream
        fi
    fi

    local z="${GIT_PS1_STATESEPARATOR-" "}"

    # NO color option unless in PROMPT_COMMAND mode
    if [ $pcmode = yes ] && [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
        __git_ps1_colorize_gitstring
    fi

    b=${b##refs/heads/}
    if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
        __git_ps1_branch_name=$b
        b="\${__git_ps1_branch_name}"
    fi

    local f="$w$i$s$u"
    local gitstring="$c$b${f:+$z$f}$r$p"

    if [ $pcmode = yes ]; then
        if [ "${__git_printf_supports_v-}" != yes ]; then
            gitstring=$(printf -- "$printf_format" "$gitstring")
        else
            printf -v gitstring -- "$printf_format" "$gitstring"
        fi
        PS1="$ps1pc_start$gitstring$ps1pc_end"
    else
        printf -- "$printf_format" "$gitstring"
    fi

    return $exit
}

到目前为止我有这个

#!/bin/bash 
printf -x "What file are you looking for?: " read x
if [ -x x.txt ]
then
    echo "ok"
else
    echo "nok"
fi

但是我不知道下一步该去哪里，我需要让用户输入一个文件，我需要它来检查我认为我拥有的文件是否存在，然后我需要它来验证它是否存在或我需要它创建一个具有该名称的空白文件。一般来说，我对 Shell 脚本和 Bash 脚本真的很陌生，所以如果这是超级基本的，我很抱歉

我的终端提示太长了。如果我输入一个长命令，它会被包装到难以阅读的下一行。

我想我会从 ParrotOS 中获取一个页面，然后在提示下方的行中输入命令。

在此之后，我设法通过进入~/.bashrc和更改来添加换行符

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '

到（注意\n最后）：

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\n\$ '

这行得通。现在$是换行符。问题是，我也想把它贴上一点。我试过了：

PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\n\t\$ '

但这会打印出一个时间：

myName@myMachine:~/someDir
14:59:15$ 

在这种情况下显然\t是时间戳占位符？

我怎样才能在那里打印一个文字标签？我当然可以只添加空格，但这不是很干净。

符号是什么意思#和$。为什么#要root？

这些约定从何而来？

问题。在 xfce4-terminal 中，当午夜指挥官运行时，如何在标题中显示终端的实际提示？

有趣的是，当我连接ssh到旧的 Centos ( Linux ocms7-app 2.6.32-431.17.1.el6.x86_64) 并运行mc时，一切正常，标题根据当前目录而变化。但在本地计算机 ( Linux local 5.0.0-32-generic #34~18.04.2-Ubuntu) 上它不起作用。

我的 Ubuntu 18.04 桌面不断抛出显然不必要的密钥环密码提示，因为我可以取消它们并继续工作而不会遇到麻烦。每当我启动 Chrome 或 Remmina 或其他几个应用程序时，这会在我登录后立即发生并在整个会话期间持续。

按照此处的建议，我可以通过删除或重命名 .Xauthority 并注销并再次登录来暂时阻止这种情况的发生，但这很麻烦，我想以某种方式自动化它。

有什么想法或其他有用的评论吗？我不想停止所有密码提示，只是那些不必要的提示。

这会在登录后立即发生，当我从启动器（不涉及终端和 sudo）打开某些应用程序（例如 Chrome 或 Remmina）时。