开发者

Command line CSV viewer with column-alignment for LARGE files

I would like to view my CSV files in a column-aligned format from the command line, with something like less, but my CSV files are sometimes gigabytes big, and I'm using a little computer (Netbook, 1GB RAM, 8GB HD, 1GHz processor), so I don't want to waste a lot of memory or processing power viewing the file.

I mention that I'd like to use something like less because I would like to be able to navigate around within the file.

cat FILE | column -s, -t | less is one thought, but cat is still going to try to print the whole file and I'm not sure how much buffering the pipes will use (if any) or what sort of caching less employs.

开发者_如何学编程

This question is similar to this other question, but I'm specifically interested in viewing large files using minimal resources preferably already on the machine. I don't presently use VI or EMACS, and think they'd both be overkill here. VI, for instance, would be a 27MB install for a utility acting merely as a viewer.


First of all, less can open oversized files. Second, both vim (which I use with the Largefile plugin and with files over 8 GB) and emacs can do it. But... Most of the time, viewing a big file in a 80x40 (or a bit bigger) terminal is useless... so you should filter it with something like (f)grep or process it with awk. If you want only the start or end, then there are head and tail.

HTH


Check the tail \ head commands.

Or even better, Download VIM source and compile it. That should be easy enough. Version 5.8 source is 1Mb before decompressing (4MB after). Enjoy.

0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜