Util-linux cheat sheet

http://www.catonmat.net/blog/util-linux-cheat-sheet/

by peofre • 14 years ago

71 16 14 years ago

dhimes7• 14 years ago

OK this is more than I need right now, but I did get curious about the "script" command that captures your term session to a text file- to start and stop use:

  script
  ctrl-d

But when looking at my output file (if you just do what I did above it will be called 'typescript') it has control characters around the file names. How can I suppress these?

bediger4000• 14 years ago

I bet you've got ls set to colorize file names, right? What you're seeing as"control characters around file names" is VT-100 escape codes to colorize the text different ways. If you do command-line editing in Bash (vi or emacs mode) you'll also see all the control characters that implement the editing. Again, more VT-100 escape code to position the cursor, overwrite characters, etc etc.

Either you set ls to not colorize filenames, or you edit the 'typescript' file. One of the values of script is that it doesn't do any interpretation of the characters it records.

dhimes7• 14 years ago

You are correct- that is exactly what it is. Thanks.

atsaloli2• 14 years ago

Which control characters?

And you say around file names... did you run "ls" while in your script session? if you generated colorized output, script will record that.

If you don't want colorized output, run "\ls" (bypass any alias you might have for ls, and just run ls directly) or use "ls --color=never".

You'll still see ^M at the end of each line.

You can run "dos2unix typescript" to strip those out.

It's script's job to record your entire session, including any control characters, and it does that.

dhimes7• 14 years ago

You are exactly right. Thank you.

zwischenzug• 14 years ago

cat the file.

dhimes7• 14 years ago

Interesting- the control characters get re-interpreted into screen commands. Thanks for that.

yoduh• 14 years ago

Haven't looked at the cheat sheets but...

If you just want something readable, a couple of quick and dirty ways are:

    col -bx < typescript|less
    strings typescript |less

You can further clean things up by deleting unwanted lines or characters using sed.

    strings typescript|sed '1d;/deleteme/d;s/deleteme//g'|less

There's also an old utility called ttyrec/ttyplay you might like.

dhimes7• 14 years ago

Thanks. It was more curiosity necessity (although now my mind is thinking, "what can I use this for?").

- interesting with ttyrec/ttyplay. I'll check on this if my mind comes up with something important.

dredmorbius• 14 years ago

For more joy:

     script --timing=typescript.time
     <stuff>
     exit
     scriptreplay -t typescript.time typescript

Try that, say, with a few commands such as 'top', 'mtr www.google.com', and 'vmstat 4 10'.

cron• 14 years ago

I'm guessing this was generated by running `man -f` on the list of executables provided by util-linux.

    descriptions() { xargs -I '{}' man -f '{}' ; }
    executables() { pkgfile -bl $1 | cut -f 2; } # Arch Linux specific
    executables util-linux | descriptions 2> missed | sort | less

Util-linux cheat sheet

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