如果你已经安装了coreutils包，你通常可以使用readlink -f relative_file_name来检索绝对符号链接(解析所有符号链接)。

我最喜欢的解决方案是@EugenKonkov的解决方案，因为它没有暗示其他实用程序的存在(coreutils包)。

但是对于相对路径“.”和“..”它失败了，所以这里有一个稍微改进的版本来处理这些特殊情况。

但是，如果用户没有cd到相对路径的父目录的权限，它仍然会失败。

#! /bin/sh

# Takes a path argument and returns it as an absolute path. 
# No-op if the path is already absolute.
function to-abs-path {
    local target="$1"

    if [ "$target" == "." ]; then
        echo "$(pwd)"
    elif [ "$target" == ".." ]; then
        echo "$(dirname "$(pwd)")"
    else
        echo "$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"
    fi
}

如果相对路径是一个目录路径，那么试试我的，应该是最好的:

absPath=$(pushd ../SOME_RELATIVE_PATH_TO_Directory > /dev/null && pwd && popd > /dev/null)

echo $absPath

use:

find "$(pwd)"/ -type f

获取所有文件或

echo "$(pwd)/$line"

显示完整路径(如果相对路径关系到)

在find的情况下，可能最简单的是给它搜索的绝对路径，例如:

find /etc
find `pwd`/subdir_of_current_dir/ -type f

这是来自所有其他解决方案的链式解决方案，例如，当realpath失败时，要么是因为没有安装它，要么是因为它带着错误代码退出，那么，将尝试下一个解决方案，直到它获得正确的路径。

#!/bin/bash

function getabsolutepath() {
    local target;
    local changedir;
    local basedir;
    local firstattempt;

    target="${1}";
    if [ "$target" == "." ];
    then
        printf "%s" "$(pwd)";

    elif [ "$target" == ".." ];
    then
        printf "%s" "$(dirname "$(pwd)")";

    else
        changedir="$(dirname "${target}")" && basedir="$(basename "${target}")" && firstattempt="$(cd "${changedir}" && pwd)" && printf "%s/%s" "${firstattempt}" "${basedir}" && return 0;
        firstattempt="$(readlink -f "${target}")" && printf "%s" "${firstattempt}" && return 0;
        firstattempt="$(realpath "${target}")" && printf "%s" "${firstattempt}" && return 0;

        # If everything fails... TRHOW PYTHON ON IT!!!
        local fullpath;
        local pythoninterpreter;
        local pythonexecutables;
        local pythonlocations;

        pythoninterpreter="python";
        declare -a pythonlocations=("/usr/bin" "/bin");
        declare -a pythonexecutables=("python" "python2" "python3");

        for path in "${pythonlocations[@]}";
        do
            for executable in "${pythonexecutables[@]}";
            do
                fullpath="${path}/${executable}";

                if [[ -f "${fullpath}" ]];
                then
                    # printf "Found ${fullpath}\\n";
                    pythoninterpreter="${fullpath}";
                    break;
                fi;
            done;

            if [[ "${pythoninterpreter}" != "python" ]];
            then
                # printf "Breaking... ${pythoninterpreter}\\n"
                break;
            fi;
        done;

        firstattempt="$(${pythoninterpreter} -c "import os, sys; print( os.path.abspath( sys.argv[1] ) );" "${target}")" && printf "%s" "${firstattempt}" && return 0;
        # printf "Error: Could not determine the absolute path!\\n";
        return 1;
    fi
}

printf "\\nResults:\\n%s\\nExit: %s\\n" "$(getabsolutepath "./asdfasdf/ asdfasdf")" "${?}"