What is Pico?
Pico is a file editor used on UNIX systems. It comes with pine,
where it is used by default to compose new messages, but it can also be
used as a stand-alone editor. It is invoked by the command pico filename,
where filename is replaced with the name of your file.
Editing commands are invoked by control key sequences (i.e. pressing
the control key together with another key.*) Several menu-like status lines
at the bottom of the screen show which commands are active at any given
time. Key strokes that do not constitute control key sequences are entered
as text at the current cursor position.
* (The old version of this file said you use use: "on a Macintosh, pressing
the Escape key twice, then another key" instead of pressing the Ctrl key. Well, on Mac OS X, the Ctrl key works, as well as Escape-Escape.)
Cursor Movement:
You can move your cursor by using the arrow keys; you may also use any of
the following editing commands:
| Ctrl-a |
Beginning of current line |
| Ctrl-e |
End of current line |
| Ctrl-v |
Forward one screen |
| Ctrl-y |
Backward one screen |
| Ctrl-f |
Forward a character |
| Ctrl-b |
Backward a character |
| Ctrl-p |
Previous line |
| Ctrl-n |
Next line |
Saving a File:
You can save the file you are working on by using the Ctrl-o
(write out) command. If you exit Pico by using the Ctrl-x (exit)
command, you will be given a chance to save the file.
Deleting Text:
| Ctrl-d |
Delete the character the cursor is on |
| Ctrl-e |
Delete to end of current line |
| Ctrl-k |
Delete the line the cursor is on |
| Ctrl-u |
Restore the last line that was deleted |
Cutting and Pasting:
You can mark text for cutting and pasting by using the Ctrl-^
command. After entering this command, move the cursor to highlight the
text you wish to cut. Use Ctrl-k (Cut) to cut the text. Then use Ctrl-u (Uncut) to paste it.
Searching:
You can search for a given text by using the Ctrl-w command. The
search is NOT case sensitive. After entering the command,
you will be prompted for the text for which you want to search. If you
press Enter at this point, Pico will repeat the last search. All searches
start at the current cursor position and wrap around to the beginning of
the file.
To move to the last line in the file, type Ctrl-w (where is),
Ctrl-v (last line). To move to the first line of the file type
Ctrl-w (Whereis), Ctrl-y (first line).
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Justifying Text:
The justify command, Ctrl-j, will remove extra white space and new
lines to make lines as equal in length as possible. It operates on the
paragraph where the cursor is currently positioned. Pico defines a
paragraph as text separated by a blank line or a line starting with a
blank or tab.
By default, Pico 'wraps' lines at 80 characters. It will not break text
in the middle of a word, however, but will go back to the most previous
white space. This default can be overridden by starting Pico with the
-w option. When this is in effect, lines too long to be displayed
on the screen will have a '$' in the column furthest to the right.
Spell Checking:
Pico includes an spell check function which can be invoked with
Ctrl-t. It will flag words it cannot find and give you a chance to
edit them, but will not suggest a correct spelling or allow you to
customize the dictionary. You can also use ispell, a more
sophisticated spell checker, on any file. At the command prompt, type
ispell filename , where "filename" is the name of the file
you want to spell check.
Help:
Online help is available with the Ctrl-g (help) command. It
invokes a short but fairly complete document that you can page through.
The command line options are discussed more thoroughly in the man page.
To see the man page for Pico, enter man pico at the command
prompt.
Command Line Options:
The following command line options are available for use when Pico is
invoked (e.g. pico -w filename):
| -w |
Disables word wrapping |
| +x |
(x is an integer) Starts the cursor x lines into the buffer |
| -nx |
(x is an integer) Checks your mailbox every x seconds and
notifies you if you have new mail. |
Miscellaneous:
Ctrl-c will report the current cursor position in the buffer by
both line number and character at the bottom of the screen.
Read a file into pico with Ctrl-r and write one from pico with
Ctrl-o. After either of these commands, you can enter Ctrl-t
(list files) to invoke the file browser. The file browser will allow you
to step through the directory structure, see a listing of all files in a
given directory, copy files, rename files, and delete files.
Pico or Vi?
Pico may seem easier to start, and I guess it is, but if you're going to be using Unix much, in the long run you'll probably want to learn vi. In spite of its intrinsic Unix-ness, I like vi better than pico or even the. |
