使用ripgrep，即rg: https://github.com/BurntSushi/ripgrep

rg - passthru……

颜色是默认的:

  rg -t tf -e  'key.*tfstate' -e dynamodb_table
       --passthru
       Print both matching and non-matching lines.

       Another way to achieve a similar effect is by modifying your pattern to
       match the empty string. 
       For example, if you are searching using rg foo then using 
       rg "^|foo" instead will emit every line in every file searched, but only
       occurrences of foo will be highlighted. 
       This flag enables the same behavior without needing to modify the pattern.

亵渎神明，没错，但格雷普已经沾沾自喜了。

安装ripgrep

你再也回不去了。

我使用的rcg来自“Linux服务器黑客”，O'Reilly。它非常适合你想要的东西，可以用不同的颜色突出多个表情。

#!/usr/bin/perl -w
#
#       regexp coloured glasses - from Linux Server Hacks from O'Reilly
#
#       eg .rcg "fatal" "BOLD . YELLOW . ON_WHITE"  /var/adm/messages
#
use strict;
use Term::ANSIColor qw(:constants);

my %target = ( );

while (my $arg = shift) {
        my $clr = shift;

        if (($arg =~ /^-/) | !$clr) {
                print "Usage: rcg [regex] [color] [regex] [color] ...\n";
                exit(2);
        }

        #
        # Ugly, lazy, pathetic hack here. [Unquote]
        #
        $target{$arg} = eval($clr);

}

my $rst = RESET;

while(<>) {
        foreach my $x (keys(%target)) {
                s/($x)/$target{$x}$1$rst/g;
        }
        print
}

正如grep -E '|pattern'已经被建议的那样，只是想澄清一下，它也可以突出显示整行。

例如:tail -f somelog | grep——color -E '| \[2\]。*'(特别是-E '|部分):

你可以从https://github.com/kepkin/dev-shell-essentials上使用我的高亮脚本

它比grep更好，因为您可以用自己的颜色突出显示每个匹配。

$ command_here | highlight green "input" | highlight red "output"

是否有某种方法可以告诉grep打印正在读取的每一行 不管是否匹配?

Option -C999 will do the trick in the absence of an option to display all context lines. Most other grep variants support this too. However: 1) no output is produced when no match is found and 2) this option has a negative impact on grep's efficiency: when the -C value is large this many lines may have to be temporarily stored in memory for grep to determine which lines of context to display when a match occurs. Note that grep implementations do not load input files but rather reads a few lines or use a sliding window over the input. The "before part" of the context has to be kept in a window (memory) to output the "before" context lines later when a match is found.

模式，如^| pattern或pattern |$或任何空匹配的子模式，如[^ -~]?|PATTERN是一个很好的技巧。然而，1)这些模式不会显示不匹配的行作为上下文突出显示，2)这不能与其他一些grep选项组合使用，例如-F和-w。

所以这些方法都不能让我满意。我使用ugrep，并使用选项-y增强grep，以有效地将所有不匹配的输出显示为彩色高亮的上下文行。其他类似grep的工具，如ag和ripgrep也提供了一个传递选项。但是ugrep与GNU/BSD grep兼容，并提供了grep选项的超集，如-y和-Q。例如，下面是选项-y与-Q结合时显示的内容(输入模式的交互式查询UI):

ugrep -Q -y FILE ...

另一种肮脏的方式:

grep -A80 -B80 --color FIND_THIS IN_FILE

我做了一个

alias grepa='grep -A80 -B80 --color'

把bashrc打印出来。