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Tried to make sudo/su section more clear

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Not Mark 2016-08-23 10:34:30 -05:00 committed by GitHub
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@ -190,6 +190,10 @@ Notes:
- For a simple web server for all files in the current directory (and subdirs), available to anyone on your network, use:
`python -m SimpleHTTPServer 7777` (for port 7777 and Python 2) and `python -m http.server 7777` (for port 7777 and Python 3).
- For running a command as another user, use `sudo`. Defaults to running as root; use `-u` to specify another user. Use `-i` to login as that user (you will be asked for _your_ password).
- For switching to another user, use `su`. Add `-` to get an environment as if the user just logged in. By default this switches to root, but you can specify a user: `su - user`. You will be asked for the password _of the user you are switching to_.
- For running a command with privileges, use `sudo` (for root) or `sudo -u` (for another user). Use `sudo bash` to actually run a shell as that user. Use `su` to login as another user and `sudo -i` to login as root. Use `su -` to simulate a fresh login as root or another user.
- Know about the [128K limit](https://wiki.debian.org/CommonErrorMessages/ArgumentListTooLong) on command lines. This "Argument list too long" error is common when wildcard matching large numbers of files. (When this happens alternatives like `find` and `xargs` may help.)