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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
ls -l report, Linux / Unix - types and permssions

What does drwtrwx--- mean on the start of your ls-l report?

The first character (d in my example) tells you the type of symbol you have on the file system, as follows:

d - a directory;
b - a block-type special file;
c - a character-type special file;
p - a named pipe;
l - a symbolic link;
S - a socket;
s - a XENIX semaphore;
m - a XENIX shared data (memory) file;
D - a Solaris door;
n - a HP-UX network special file;
- - a plain file.
and I've heard rumours of a "*" appearing - anyone know about that?

The following characters are grouped 3 by three:

First three - the user (file owner's) permissions
Next three - the group permissions
First three - the permissions other users have

and the characters you'll find are:

r - the file is readable
w - the file is writable
x - the file is executable (or accessible for a directory)
- - the indicated permission is not granted.

The user execute character may also be:

s - the file has set-user-ID mode
S - the set-user-ID bit is set on the file but it is not executable

The group execute character may also be:

s - the file has set-group-ID mode;
l - mandatory locking is enabled for the file (standard)
L - mandatory locking is enabled for the file (Posix)

And the other group execute character may also be:

t - the sticky bit of the mode is on
T - the sticky bit is on but the file is not executable
(written 2007-02-06, updated 2007-02-07)

 
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A101 - Web Application Deployment - Linux -An Introduction For Users
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  [74] pushd and popd - (2004-10-05)
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  [249] An easy way out - (2005-03-17)
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