gnuplot无法通过ssh命令运行 [英] gnuplot doesn't work through ssh command

问题描述

所以我有一个csv，并且我有一个plt文件.我运行gnuplot plt-file.plt并且png诞生了.

So I have a csv, and I have a plt file. I run gnuplot plt-file.plt and a png is born.

但是如果我运行ssh sameuser@samemachine 'gnuplot plt-file.plt'，我会收到pngcario错误.

But if I run ssh sameuser@samemachine 'gnuplot plt-file.plt' I get a pngcario error.

csv:sar.csv

The csv: sar.csv

time,               average io writes 
4/15/2014 22:28,    6.040546875
4/15/2014 22:28,    7.943100586
4/15/2014 22:29,    8.686162109
4/15/2014 22:29,    7.693891602
4/15/2014 22:30,    8.579804688
4/15/2014 22:30,    7.900537109

plt:

clear
reset
print "sar"
set terminal pngcairo transparent enhanced font "arial,25" fontscale 1.0 size 1920, 1080
set key outside bottom center box title "sar" enhanced
set key maxrows 4
set key font ",25" spacing 1 samplen 2.9 width 2 height 1
set xlabel "Time (hours)" font ",25"
set ylabel "Utilization (%)" font ",25"

set output "./sar.png"
set title "sar" font ",35"
set datafile separator ","
set timefmt "%Y-%m-%d %H:%M:%S"
set ytics font ",25"

set style line 1 lt 1 lc rgb "red" lw 4

show style line

offset = 0
starting_time = 37824
t0(x)=(offset=($0==0) ? x : offset, x - offset)

plot "./sar.csv" using (t0(timecolumn(1))/3600):2 every ::3 ls 1 t "sar" with lines

最后说明:我已经用png标志编译了gnuplot.我只需要任何一种标准的图像格式.

Final note: I've compiled gnuplot with the png flag. I just needed any sort of standard image format.

推荐答案

这意味着，当您使用ssh登录时，可能未找到您自己编译的gnuplot.在两种情况下都键入which gnuplot可以查看使用了哪个二进制文件.

That means, that your self-compiled gnuplot probably isn't found when you log-in with ssh. Type which gnuplot in both cases to see which binary is used.

通常，当使用ssh时，会得到一个非交互式外壳，该外壳提供与登录外壳不同的配置文件，并且具有与登录外壳不同的环境变量，请参见例如为什么与手动运行相比，SSH远程命令获得的环境变量更少?.

Usually when using ssh you get a non-interactive shell, which sources different configuration files and has different environmental variables than a login shell, see e.g. Why does an SSH remote command get fewer environment variables then when run manually?.

因此，您可以更改相应的配置文件(使用的配置文件，取决于您的分发)，也可以使用gnuplot二进制文件的完整路径.

So you can either change the respective configuration files (which ones are used, depends on your distribution), or you can use the full path to the gnuplot binary.

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