1、screenFetch 是一个能够在截屏中显示系统/主题信息的命令行工具。它可以在 Linux，OS X，FreeBSD 以及其它的许多类Unix系统上使用。来自 man 手册的说明：

可以用来生成那些漂亮的终端主题信息和用 ASCII 构成的发行版标志，就像如今你在别人的截屏里看到的那样。它会自动检测你的发行版并显示 ASCII 版的发行版标志，并且在右边显示一些有价值的信息。

安装 screenfetch

克隆screenFectch库:
git clone https://github.com/KittyKatt/screenFetch.git
Cloning into 'screenFetch'...
remote: Counting objects: 3659, done.
remote: Total 3659 (delta 0), reused 0 (delta 0), pack-reused 3659
Receiving objects: 100% (3659/3659), 3.60 MiB | 993.00 KiB/s, done.
Resolving deltas: 100% (2111/2111), done.

移动到指定文件夹下：#mv screenFetch /usr/bin/添加可执行权限：#chmod +x /usr/bin/screenFetch/执行命令：#/usr/bin/screenFetch/screenfetch-dev

                  ..                    root@kvm-host.PLTJ.                  OS: CentOS 7.3.1611 Core<><><><>                 Kernel: x86_64 Linux 3.10.0-514.el7.x86_64KKSSV' 4KKK LJ KKKL.'VSSKK        Uptime: 2d 21h 20mKKV' 4KKKKK LJ KKKKAL 'VKK        Packages: 939V' ' 'VKKKK LJ KKKKV' ' 'V        Shell: bash 4.2.46.4MA.' 'VKK LJ KKV' '.4Mb.        CPU: Intel Core i9-7900K @ 6x 0MHz [100.0°C]. KKKKKA.' 'V LJ V' '.4KKKKK .      GPU: svgadrmfb.4D KKKKKKKA.'' LJ ''.4KKKKKKK FA.    RAM: 949MiB / 7806MiB<QDD ++++++++++++  ++++++++++++ GFD>  'VD KKKKKKKK'.. LJ ..'KKKKKKKK FV    ' VKKKKK'. .4 LJ K. .'KKKKKV '     'VK'. .4KK LJ KKA. .'KV'        A. . .4KKKK LJ KKKKA. . .4       KKA. 'KKKKK LJ KKKKK' .4KK       KKSSA. VKKK LJ KKKV .4SSKK       <><><><>                'MKKM'

2、linux_logo 程序生成一个彩色的 ANSI 版企鹅图片，还包含一些来自 /proc 的系统信息

安装

只需按照你的 Linux 发行版安装相应的软件包即可：

Debian/Ubutnu/Mint
#apt-get install linux_logoCentOS/RHEL/旧版 Fedora
#yum install linux_logoFedora Linux v22+ 或更新版本
# dnf install linux_logo

运行：

$ linux_logo

             ,        ,/(        )`\ \___   / |/- _  `-/  '(/\/ \ \   /\/ /   | `    \O O   ) /    |`-^--'`<     '(_.)  _  )   /`.___/`    /`-----' /
<----.     __ / __   \
<----|====O)))==) \) /====
<----'    `--' `.__,' \|        |\       /       /\______( (_  / \______/,'  ,-----'   |`--{__________)Linux Version 3.10.0-514.el7.x86_64, Compiled #1 SMP Tue Nov 22 16:42:41 UTC 2016Two 4.2GHz Intel i9 Processors, 8GB RAM, 16800 Bogomips Totalkvm-host

可以用这个命令查看内置的标志列表：$ linux_logo -f -L list

Available Built-in Logos:Num     Type    Ascii   Name            Description1       Banner  Yes     bsd_banner      FreeBSD Logo2       Classic Yes     irix            Irix Logo3       Classic Yes     bsd             FreeBSD Logo4       Banner  Yes     solaris         The Default Banner Logos5       Classic Yes     aix             AIX Logo6       Classic Yes     classic         The Default Classic Logo7       Banner  Yes     debian_banner   Debian Banner (white) 8       Banner  Yes     mandrake_banner Mandrake(TM) Linux Banner9       Banner  Yes     pld             PLD Linux banner10      Banner  Yes     suse            SUSE Logo11      Banner  Yes     sourcemage_ban  Source Mage GNU/Linux banner12      Classic Yes     gnu_linux       Classic GNU/Linux13      Classic Yes     core            Core Linux Logo14      Classic Yes     debian          Debian Swirl Logos15      Banner  Yes     slackware       Slackware Logo16      Banner  Yes     mandriva        Mandriva(TM) Linux Banner17      Banner  Yes     redhat          RedHat Banner (white) 18      Banner  Yes     ubuntu          Ubuntu Logo19      Classic Yes     debian_old      Debian Old Penguin Logos 20      Banner  Yes     sme             SME Server Banner Logo21      Banner  Yes     sourcemage      Source Mage GNU/Linux large22      Banner  Yes     mandrake        Mandrakelinux(TM) Banner23      Banner  Yes     banner          The Default Banner Logo24      Classic Yes     classic-simp    Classic No Dots Or Letters25      Classic Yes     classic-nodots  The Classic Logo, No Periods26      Banner  Yes     banner-simp     Simplified Banner LogoDo "linux_logo -L num" where num is from above to get the appropriate logo.
Remember to also use -a to get ascii version.

$ linux_logo -L 14

                               _sudZUZ#Z#XZo=_         DDDD   EEEEEE BBBB   IIIIII  AAAA   NN   NN_jmZZ2!!~---~!!X##wa       DD DD  EE     BB BB    II   AA  AA  NNN  NN.<wdP~~            -!YZL,     DD  DD EEEEE  BBBBB    II   AAAAAA  NNNN NN.mX2'       _%aaa__     XZ[.   DD DD  EE     BB  BB   II   AA  AA  NN NNNNoZ[      _jdXY!~?S#wa   ]Xb;   DDDD   EEEEEE BBBBB  IIIIII AA  AA  NN   NN_#e'     .]X2(     ~Xw|  )XXc
.2Z`      ]X[.       xY|  ]oZ(   Linux Version 3.10.0-514.el7.x86_64
.2#;      )3k;     _s!~   jXf`   Compiled #1 SMP Tue Nov 22 16:42:41 UTC 20161Z>      -]Xb/    ~    __#2(    Two 4.2GHz Intel i9 Processors, 8GB RAM-Zo;       +!4ZwaaaauZZXY'      16800 Bogomips Total*#[,        ~-?!!!!!!-~        kvm-hostXUb;.                       )YXL,,                     +3#bc,                   -)SSL,,                ~~~~~

或者只是随机看看一些 Linux 标志：$ linux_logo -f -L random_xy

                SSSSS  OOOO  L        AA   RRRRR   III  SSSSSS      O    O L       A  A  R    R   I  SS      O    O L      A    A R    R   I  SSSSS  O    O L      AAAAAA RRRRR    I   SSSSS O    O L      A    A R R      I       SS O    O L      A    A R  R     I       SSSSSS   OOOO  LLLLLL A    A R   R   III SSSSSLinux Version 3.10.0-514.el7.x86_64, Compiled #1 SMP Tue Nov 22 16:42:41 UTC 2016Two 4.2GHz Intel i9 Processors, 8GB RAM, 16800 Bogomips Totalkvm-host

3、获取帮助

输入下列命令：

1. $ screefetch -h

2. $ linux_logo -h

4、可以在登录界面输出你的 Linux 发行版徽标。要输出默认徽标，你可以在 ~/.bashrc文件的最后添加以下内容

if [ -f /usr/bin/linux_logo ]; then linux_logo; fi

如果没有~/.bashrc 文件，你需要在当前用户的 home 目录下新建一个

在添加以上内容后，你只需要注销并重新登录即可看到你的发行版的默认徽标

其实你也可以在登录后输出任意随机图标，只需加入以下内容：

if [ -f /usr/bin/linux_logo ]; then linux_logo -L random_xy; fiLast login: Thu Aug 24 00:05:10 2017 from 192.168.0.190####   ###                 #####  ##   ##                  ####       ##   ####    ####   ##  ### ###        ### ####   ### ###   #######     ##      ##  ##      ## ##    ##   ##   ##     ##   ###  ## ##  ####    ##   #####  ##      ####      ## #### ##   #####   ##      ########  ##   ##  ##  ##  ##      ## ##      ###  ###   ##  ##   ##      ##
|  ####   ####  ######  ####  ###  ###    ##    ##    ######  ##       #####
`------------------------------------------------------------- l  i  n  u  x

也可以直接指定徽标所在的位置来显示你自己的徽标。

$ linux_logo -D /path/to/ASCII/logo

如果你想使用　ASCII　徽标而不是含有颜色的 ANSI 徽标，则使用如下命令

$ linux_logo -a > /etc/issue.net

5、用命令在终端循环打印logo：

for i in {1..30};do linux_logo -f -L $i;sleep 2;done

       >>>> OOO        IIIIII IIIIII IIIIII II  II>>>>>N NOOOO        II   II  II   II    IIIIOOO>> NN NN OOOO      II   IIIIII   II     IIOOOO NN NN  NNN      II   II II    II    IIIIOOONN NNNNN      IIIIII II  II IIIIII II  IIOOOO  OOON NNN   NNNNNOOO >>OONN >> NNNNNN  OOOO    NNNNN NN  Linux Version 3.10.0-514.el7.x86_64NN>>>OOOO>>>NN >> NN  Compiled #1 SMP Tue Nov 22 16:42:41 UTC 2016NN>>  >NN> NN>> >>NN  Two 4.2GHz Intel i9 Processors, 8GB RAMNN  >>>NN  NN >>  NN  16800 Bogomips Total>>> NN  NN  >>     kvm-hostOOO  NN  NN   OOO OOO NN  NN OOO   OOONN  NNOOO    OONN  NNO      ,        ,/(        )`\ \___   / |/- _  `-/  '(/\/ \ \   /\/ /   | `    \O O   ) /    |`-^--'`<     '  Linux Version 3.10.0-514.el7.x86_64(_.)  _  )   /  Compiled #1 SMP Tue Nov 22 16:42:41 UTC 2016`.___/`    /  Two 4.2GHz Intel i9 Processors, 8GB RAM`-----' /  16800 Bogomips Total
<----.     __ / __   \  kvm-host
<----|====O)))==) \) /====
<----'    `--' `.__,' \|        |\       /       /\______( (_  / \______/,'  ,-----'   |`--{__________)SSSSS  OOOO  L        AA   RRRRR   III  SSSSSS      O    O L       A  A  R    R   I  SS      O    O L      A    A R    R   I  SSSSS  O    O L      AAAAAA RRRRR    I   SSSSS O    O L      A    A R R      I       SS O    O L      A    A R  R     I       SSSSSS   OOOO  LLLLLL A    A R   R   III SSSSSLinux Version 3.10.0-514.el7.x86_64, Compiled #1 SMP Tue Nov 22 16:42:41 UTC 2016Two 4.2GHz Intel i9 Processors, 8GB RAM, 16800 Bogomips Totalkvm-hostAAAA  IIIIII XX  XXAA  AA   II    XXXX()  ()  ()  ()  ()  ()   AAAAAA   II     XXAA  AA   II    XXXX()  ()  ()  ()  ()  ()   AA  AA IIIIII XX  XX()  ()  ()  ()  ()  () Linux Version 3.10.0-514.el7.x86_64()  ()  ()  ()  ()  ()   Compiled #1 SMP Tue Nov 22 16:42:41 UTC 2016Two 4.2GHz Intel i9 Processors, 8GB RAM()  ()  ()  ()  ()  ()   16800 Bogomips Totalkvm-host()  ()  ()  ()  ()  ()