MOTD脚本不显示颜色[关闭]

Question

我正在使用带有基于 Debian 的发行版的 Raspberry Pi（我认为它称为 Raspbian）。我将一个名为10-pi 的文件放入/etc/update-motd.d 目录并使其可执行。当我自己运行可执行文件（bash）时，它向我展示了一个带有颜色的漂亮 MOTD。然而，当我使用 ssh 登录我的 Pi 时，我看到了正确的 MOTD，但它以白色显示所有内容。有人知道为什么会这样吗？

这是我的10-pi 文件：

#!/bin/bash

let upSeconds="$(/usr/bin/cut -d. -f1 /proc/uptime)"
let secs=$((${upSeconds}%60))
let mins=$((${upSeconds}/60%60))
let hours=$((${upSeconds}/3600%24))
let days=$((${upSeconds}/86400))
UPTIME=`printf "%d days, %02dh%02dm%02ds" "$days" "$hours" "$mins" "$secs"`

# get the load averages
read one five fifteen rest < /proc/loadavg

echo "$(tput setaf 2)
   .~~.   .~~.    `date +"%A, %e %B %Y, %r"`
  '. \ ' ' / .'   `uname -srmo`$(tput setaf 1)
   .~ .~~~..~.
  : .~.'~'.~. :   Uptime.............: ${UPTIME}
 ~ (   ) (   ) ~  Memory.............: `cat /proc/meminfo | grep MemFree | awk {'print $2'}`kB (Free) / `cat /proc/meminfo | grep MemTotal | awk {'print $2'}`kB (Total)
( : '~'.~.'~' : ) Load Averages......: ${one}, ${five}, ${fifteen} (1, 5, 15 min)
 ~ .~ (   ) ~. ~  Running Processes..: `ps ax | wc -l | tr -d " "`
  (  : '~' :  )   IP Addresses.......: `/sbin/ifconfig eth0 | /bin/grep "inet addr" | /usr/bin/cut -d ":" -f 2 | /usr/bin/cut -d " " -f 1` and `wget -q -O - http://icanhazip.com/ | tail`
   '~ .~~~. ~'    Weather............: `curl -s "http://rss.accuweather.com/rss/liveweather_rss.asp?metric=1&locCode=EUR|UK|UK001|NAILSEA|" | sed -n '/Currently:/ s/.*: \(.*\): \([0-9]*\)\([CF]\).*/\2\3, \1/p'`
       '~'
$(tput sgr0)"

这是我自己执行文件时的样子： Output when executed manually

Answer 1

您可以添加以下行：

export TERM="xterm-256color"

到脚本的顶部，以确保在正确的环境下执行脚本以显示颜色。

或者，您可以直接指定颜色，而不是间接使用 echo 和 tput 等等：

#!/bin/bash

let upSeconds="$(/usr/bin/cut -d. -f1 /proc/uptime)"
let secs=$((${upSeconds}%60))
let mins=$((${upSeconds}/60%60))
let hours=$((${upSeconds}/3600%24))
let days=$((${upSeconds}/86400))
UPTIME=`printf "%d days, %02dh%02dm%02ds" "$days" "$hours" "$mins" "$secs"`

# get the load averages
read one five fifteen rest < /proc/loadavg

printf "\033[1;32m
   .~~.   .~~.    `date +"%A, %e %B %Y, %r"`
  '. \ ' ' / .'   `uname -srmo`\033[0;31m
   .~ .~~~..~.
  : .~.'~'.~. :   Uptime.............: ${UPTIME}
 ~ (   ) (   ) ~  Memory.............: `cat /proc/meminfo | grep MemFree | awk {'print 
$2'}`kB (Free) / `cat /proc/meminfo | grep MemTotal | awk {'print $2'}`kB (Total)
( : '~'.~.'~' : ) Load Averages......: ${one}, ${five}, ${fifteen} (1, 5, 15 min)
 ~ .~ (   ) ~. ~  Running Processes..: `ps ax | wc -l | tr -d " "`
  (  : '~' :  )   IP Addresses.......: `/sbin/ifconfig eth0 | /bin/grep "inet addr" | 
/usr/bin/cut -d ":" -f 2 | /usr/bin/cut -d " " -f 1` and `wget -q -O - 
http://icanhazip.com/ | tail`
   '~ .~~~. ~'    Weather............: `curl -s 
      "http://rss.accuweather.com/rss/liveweather_rss.asp? 
   metric=1&locCode=EUR|UK|UK001|NAILSEA|" | sed -n '/Currently:/ s/.*: \(.*\): \([0- 
   9]*\)\([CF]\).*/\2\3, \1/p'`
       '~'
\033[1;37m"