我必须使用watch
以便在文件(doc.txt)中写入新版本文件和旧版本文件之间的差异。
我尝试过watch -t -d -n 10 "cat myfile.txt | tee doc.txt"
,但所有myfile.txt
文本都是使用命令写入终端的,cat
并且差异仅突出显示。并且在 中doc.txt
,有与 myfile.txt 中相同的内容。
有任何想法吗?
答案1
看门人说
watch - execute a program periodically, showing output fullscreen
在哪里
-n, --interval seconds
Specify update interval. The command will not allow quicker
than 0.1 second interval, in which the smaller values are con‐
verted. Both '.' and ',' work for any locales.
-d, --differences [permanent]
Highlight the differences between successive updates. Option
will read optional argument that changes highlight to be perma‐
nent, allowing to see what has changed at least once since
first iteration.
-t, --no-title
Turn off the header showing the interval, command, and current
time at the top of the display, as well as the following blank
line.
猫人说
cat - concatenate files and print on the standard output
穿T恤的男人说
tee - read from standard input and write to standard output and files
这可能有效
每 10 秒观察 2 个版本的 doc.txt 之间的差异并将其写入文件 doc.txt
watch -t -d doc.txt -n 10 | tee new.txt