ONE HOUR Linux SESSIONS: 2014-2018
sessions in chronological order going back to 2014

sessions continue at:
http://johnmeister.com/linux/Intro-to-Linux/One-Hour-Linux-Sessions-2019.html

2018

JohnMeister.com Today's Date:

Remember: SAW - simple always works
Too many special characters strung together and most of us Linux lovers won't remember or understand.
The goal here is to understand and remember.
The intended audience of this material are power users, Sys Admins, Analysts, Engineers, and Web Masters.
Programmers may pick up a few tricks; but anything they share will likely far exceed our limited comprehension buffers.

NOTE: LinuxMeister dot net is expired, to access files use this path: http://johnmeister.com/linux/

sessions continue at:
http://johnmeister.com/linux/Intro-to-Linux/One-Hour-Linux-Sessions-2019.html

The Art of Linux System Administration - on Amazon and O'Reilly Media

sessions continue at:
http://johnmeister.com/linux/Intro-to-Linux/One-Hour-Linux-Sessions-2019.html

Session #140 - November 30, 2018 -

Session #140 Linux at Lunch - 11/30/2018 - LAST SESSION 
 SESSION #1 was held on November 26, 2014   
this will be the last session, at least for 2018...  
    ending this series at #140 on Nov 30, 2018  - 4 years and 4 days... 
 
THIS SESSION:
- using cygwin on windows for file management and regular expressions
             
             http://johnmeister.com/linux/Scripts/Engineering/Get-a-CLUE-w-Linux.pdf
- using time to see how well cygwin performs (cf. w/linux if possible)   (time )
- fix-filenames:  a script to undo bad habits
    
    http://johnmeister.com/linux/Scripts/fix-filenames.sh.html
- determine disk hogs  (du -sh) and other file management tricks of sys admins (that create more problems later! :)
- find large files and move, remove, etc.  (find ....) (page with examples is AWOL... !!!)
       
       http://johnmeister.com/linux/Commands/find-copy.html
- using script to capture tasks you'd like to make into a script  (script name.RAW; cat name.RAW | col -b > name.txt )
- using windows command in cygwin

Session #139 - November 9, 2018 -

Session #139 Session #139 - November 9 - Linux at Lunch
This SESSION: crontab, wrapper scripts and backup techniques

- wrapper script to create a copy of a file with a sortable date prefixed to file name 
    http://johnmeister.com/linux/Scripts/using-DATE-prefix-or-suffix.html 
    http://johnmeister.com/linux/Scripts/wrapper-script.html 
    http://johnmeister.com/linux/Scripts/wrapper-copy-w-date.sh.html 
    http://johnmeister.com/linux/Scripts/filedate.sh.html 
- identify a list of key files: e.g. .bashrc, .vimrc, .viminfo, .ssh/authorized_keys, /etc/hosts, /etc/passwd, etc.
        http://johnmeister.com/linux/Scripts/Replace-README-using-find.html
        http://johnmeister.com/linux/SysAdmin/Editing-Apache2-etc-default-server.conf.html
- create script to check key files and create a dated backup copy of updates in ~/bin/KEY
        http://johnmeister.com/linux/Scripts/LOOPS-shell-examples.html
        http://johnmeister.com/linux/SysAdmin/system-check-script-July-2012.sh.html
- create rsync script to sync directory of backup copies with another system
        http://johnmeister.com/linux/Scripts/rsync-directories.sh.html
        http://johnmeister.com/linux/SysAdmin/Using-rsync.html
        http://johnmeister.com/linux/Notes/RSYNC-cmd.html
        http://johnmeister.com/linux/SysAdmin/SysAdmin-scripts-n-tools.html
- incorporate scripts to check key files and rysnc into crontab
        http://johnmeister.com/linux/Notes/crontab-email-setup.html
        http://johnmeister.com/linux/Notes/wget-n-crontab.html
        http://johnmeister.com/linux/SysAdmin/Cron-Rsync-sync-up-drives.sh.html
        http://johnmeister.com/linux/FileSystems/man.rsync.txt
- demonstrate how to use tar and compress (etc.)  to create an additional backup copy to be archived
        http://johnmeister.com/linux/FileSystems/creating-TAR-n-ZIP.html
        http://johnmeister.com/linux/Commands/MAN/man.tar.html
        http://johnmeister.com/linux/Notes/how-to-TAR-home.html
        http://johnmeister.com/linux/SysAdmin/UNIX/OldTapeBackup-ufsdump-restore/

Session #138 - October 26, 2018 -

Session #138 Linux at Lunch - 10/26/2018 - 
Basics of RAID - (redundant array of inexpensive disks):
 
 http://johnmeister.com/linux/FileSystems/RAID-info.html

logical volume manager on Linux will allow you to use JBOD for RAID:
 
 http://johnmeister.com/linux/FileSystems/setup-LVM.html 

using more than one computer at home and with external drives connected via USB is a reasonable backup method: 
will discuss different scenarios, and using rsync: 

http://johnmeister.com/linux/Scripts/rsync-directories.sh.htm

Session #137 - October 12, 2018 -

Session #137 Linux at Lunch - 10/12/2018 - review environments and scripts, using cygwin for windows commands

FRIDAY'S SESSION:
    - discuss environments (.bashrc)   http://johnmeister.com/linux/basic-setup-for-BASH.html
    - review scripts and discuss:   http://johnmeister.com/linux/Scripts/
    - discuss cmd in cygwin:   http://johnmeister.com/linux/Microsoft/CygWin-when-penguins-are-not-allowed-to-roam-free.html

Session #136 - September 28, 2018 -

Session #136- September 28, FRIDAY: READING a file into another file...

SITUATION RESOLVED: 1,189 web pages have been updated.
Linux at Lunch - Session #136 - 9/28/2018 - completed file insertion using SED and SHELL

FRIDAY'S SESSION:

READ a file into another file... COMPLETED...  
1,189 web pages NAVIGATION added (by Monday night!)...

review and discuss the process and tools used.  
Show how using and editing the history allowed for faster turnaround by adding commands via semicolon on one line.

http://johnmeister.com/linux/Scripts/SED-used-to-insert-Table-of-Content-in-HTML-pages.txt

http://johnmeister.com/BIBLE/STUDY

Session #135 - September 21, 2018 -

Session #135- September 21, FRIDAY: READING a file into another file...

SITUATION: Have 1,189 web pages that I'd like to add NAVIGATION in to. 

However, there are 66 groupings of these pages with different navigation. 

So I need to create a custom navigation for each of these 66 groupings - 
have a basic set of internal vi sed commands. 

Once that's created I need to insert that navigation, or more correctly, 
a Table of Contents, into each of those like pages. 

Then scp or rsync my local system with my server and test. 


1) I have a manual process: 
    1) vi *files-with-same-name* 
    2) <esc> / key words 
    3) dd ; <esc>:r toc-filename 
    4) <esc>:wn 
    5) repeat until fingers bleed then scp -rp <updated files> server:/path

2) someone said PYTHON, his name was NOT monty...  so... with his help I got it working:
        1) 1 created the toc (table of contents) file, then found the key word search string
        2) dummied up files with simple names and tested - worked
        3) attempted to insert a simple for loop for *files-with-same-name*, failed
        4) BRUTE FORCE SCRIPT worked:  http://johnmeister.com/linux/Scripts/Python-script-attempt-without-a-loop.txt
        5) the use of python without knowledge, training or a clear cheat sheet was MORE WORK

3) someone said SED... it wasn't Fred... but it was said by more one... so...
        1) got some basic stuff working...
        2) can find the pattern and read the toc file... however, it doesn't output the original file to stdout
        3) I could not get sed to edit in place with the pattern as stated
        4) am reading the sed&awk book by oreilly and hoping to write a sed script before Friday
        5) one possibility is to replace the complex with PERL, then...
        6) sed '/banana/r file2' file1 > newfile
        7) GOOD NEWS at 23:13:38 19 Sep - PROBLEM: needed to add ".bak" to the -i in MacOSX BASH / SED!!!
                  Once I escaped all the special characters I still got this error: 
                sed: 1: "mal.html": invalid command code m     
                SEARCH pointed out the problem was a "safety feature".
     sed -i.bak '/\<br\>\<center\>\<hr width=\"50%\"\>\<\/center\>\<\/td\>/r toc-mal' mal.html

       8) now I can write a for loop to get through all of the groupings!
       9) thanks to the folks who said to use SED.    :)
      10) one other note... had to add one more line to remove the string that was supposed to be replaced:
     sed -i.bak '/\<br\>\<center\>\<hr width=\"50%\"\>\<\/center\>\<\/td\>/d' mal.html

4) PERL still seems like a viable tool...
        1) however, my perl scripting class is long expired (1998)
        2) but... I can use my perl -pi -e 's/complex string for/ banana/g'  files   
            - and then use the sed line from #6 above.
        3) I'm going to have my nose in the O'Reilly book on sed & awk and see what h and H and r really do in sed.
        4) Considering the damage I did with perl on prior sessions, I'm stopping at SED this trip.
        5) although perl is still in my tool box, just fixed an error where I had "Revelation" in the title of Isaiah!

        --> grep Revelation *Isa*     #  oops...  all 66 books had it!  didn't edit my template properly
        --> perl -pi -e 's/Revelation/Isaiah/g' *Isa*
        --> grep Revelation *Isa*     #  all gone... 



ONE THING I'VE LEARNED is that a bunch of my really smart friends will say, oh, just use this or that... 
most of them just leave you with that, or say RTM... 
    or they could do it with this or that tool... and let you research it.

I've heard and experienced this for decades... it's very common for a developer or advanced sys admin to 
say these things, it's another for those helpful and knowledgeable folks to actually help with the exact 
syntax and make it work.... generally it is never as easy as any of us thought.  

But every little bit of info, advice and suggestions helps.  

Have a friend back east who has been helping me with Python... 
he's run into the same issues I have, but worked it through... he's promised to show me
how to setup a for loop tonight (Wed)... 

I'm trying to make a generic script that does this and just change the variables.  I have
manually edited those 1,189 files several times... 
and have ideas for more enhancements.  :)  
Despite my lack of coding skills, the web site is coming along nicely.

Session #134 - September 14, 2018 -

Session #134- September 14, FRIDAY: SIMPLE ALWAYS WORKS!

TWO THINGS TO SORT OUT:
1) ERROR: xargs: unmatched single quote; by default quotes are special to xargs unless you use the -0 option
2) difference in counts between xargs and -exec when using the same command
(...and of course any differences with grep -i and escaping ".")

Once again, upon searching with this error I find myself once again in
the WASTELAND of FORUMS with misinformation and unanswered questions.
Leaving me to setup a known situation and case and testing the variables myself.
Will also try to do this in Cygwin so we can also use find and perl on Windows...

HOWEVER, one of the lunch time linux folks suggested finding the rogue file, found it, fixed it and updated server...

------------------------------------------------
## using xargs gave an error, and a slight different count than using -exec
------------------------------------------------
--> time find . -type f -name "*.html" | xargs grep -i "johnmeister.com" | wc -l
xargs: unmatched single quote; by default quotes are special to xargs unless you use the -0 option
52843
real 0m10.360s
user 0m5.439s
sys 0m0.321s
------------------------------------------------
--> time find . -type f -name "*.html" -exec grep "wagoneers\.com" {} \; | wc -l
61947
real 3m29.839s
user 0m53.282s
sys 0m25.615s
------------------------------------------------
Here's the steps used to sort out the single quote thing and update the server:

http://johnmeister.com/linux/Scripts/Using-find-perl-to-fix-wagoneers.com.html

---------
UPDATE FROM SESSION:
find tmp -type f -name 'sed-xargs-test.txt' | xargs sed -ir 's$before$after$g'
sed with a "-i" = in place editing
sed with a "-r" = extended regex (more perl compatible) (still must be carefull with parens!)

the find with parens destroyed thousands of files... must escape parens: 

NOTE:
sed 's/[a-z]*$-processing$/post\1/' <<

Session #133 - September 7, 2018 -

Session #133- September 7, FRIDAY: SIMPLE ALWAYS WORKS!
1) using grep, find and perl...
or how to fix 3,359 web pages in 8 minutes and 40 seconds.
-
http://johnmeister.com/linux/Notes/Perl-to-fix-incomplete-URL.html
-
http://johnmeister.com/linux/Commands/PERL-examples-2018-09-Sep-06.txt
- will fix some entries on all the pages in real time, e.g.:
a) grep for suspect string, pick a file:
grep "Cor rinthian" * # 56 files were found with this error.
1091_47_2_Corinthians_13_nas.html:<th colspan="3" bgcolor="aaccff"> 2 Cor rinthians 13  </th>
b) WHAT is a good idea at this point is to make a COPY of the file in tmp as a precaution!
cp 1091_47_2_Corinthians_13_nas.html /tmp/save-for-a-bit # (history will help you remember the real name)
c) select one file, as noted above, try perl string, grep again or edit file to validate,
perl -pi -e 's/Cor rinthians /Corinthians /g' 1091_47_2_Corinthians_13_nas.html
d) test: grep "Cor rinthian" 1091_47_2_Corinthians_13_nas.html # expected response is none... nothing... "silence is golden"
e) now, recall history and change the file name 1091... to a wildcard, or restricted wildcard, e.g. *Cori*
f) perl -pi -e 's/Cor rinthians /Corinthians /g' *
g) at this point there are two other directories that have related files, would cd ../OTHERDIR1, recall command via history, then cd again
h) while not completely necessary, removing the file from /tmp (or where ever you parked it) is a good idea.

2) combine the use of find to fix or change various strings in the text, for example:
# grep "" * # two files came up in the subdirectory
# perl -pi -e 's///g' bashrc-n-history-details.html # this fixed one file, there's one left
# find . -type f -name 'setup-diverse-systems-prototype.sh.html' -exec perl -pi -e 's///g' {} \;

grep "a string" * # two files
perl -pi -e 's/a string//g' bashrc-n-history-details.html
grep "a string" * # just one file
find . -type f -name 'setup-diverse-systems-prototype.sh.html' -exec perl -pi -e 's/a string//g' {} \;
grep "a string" * # none found

At this point we change the string to hit all html files and go to the top of each directory where this might exist.

GOOD IDEA TO TEST FIRST:
find . -type f -name '*.html' -exec grep "a string" {} \;
<img src="http://johnmeister.com/pix/practical-suggestions-for-Microsoft-Windows-small.jpg" width="86%"><br></a>
THEN EXECUTE REPLACEMENT OF STRING:
find . -type f -name '*.html' -exec perl -pi -e 's/a string//g' {} \;

--> time find . -type f -name '*.html' -exec grep "even free" {} \;

real 4m17.062s
user 0m57.338s
sys 0m31.313s

SEE ALSO: http://johnmeister.com/linux/SysAdmin/How-to-update-18-thousand-pages.html for use of xargs or just find...

3) time permitting, review the work of a couple years' using wget, perl, sed, grep, awk, vi, html and find...
to build a complete website that works with any browser or device and is portable and stands alone.

Session #132 - August 17, 2018 -

Session #132- August 17, FRIDAY: SIMPLE ALWAYS WORKS!

1) dd of 8TB - took 16.36 days... not doing THAT again. :)
http://johnmeister.com/linux/FileSystems/usingParted8TB.html
http://johnmeister.com/linux/FileSystems/rescuing-failing-drive-w-dd.html
------------------------------------------------
root@LOVING-LINUX -root- [/root]
------------------------------------------------
--> dd if=/dev/sdc of=/dev/sdd
------------------------------------------------
dd: reading `/dev/sdc': Input/output error
43184776+0 records in
43184776+0 records out
22110605312 bytes (22 GB) copied, 4404.01 s, 5.0 MB/s
------------------------------------------------

2) rsync script:

3) sequentially number files - had to do a bit of manual processing...
http://johnmeister.com/linux/Scripts/number-file-names.sh.html,
had to number files from 1 to 1,189 to get: http://bibletech.net from http://bibletech.net/READ

4) used paste, head, cut, cat, and a few other commands to merge several separate files into 1,189 html files.

5) Reordered the daily reading to follow the Hebrew version's ordering of these texts...
http://bibletech.net/Mikrah - looking at it I need to create an index file for it...
that will involve: ls > index.html ; vi index.html ; :%s$.*$ & $g ;
and then will need to put them into various sections, add headings and insert the table format associated with my base README.html template.
Which is mostly laid out in this script:
http://johnmeister.com/linux/Scripts/mk-webpage-2015-05-08.html this creates an "ALL.html" page,

Session #131 - July 27, 2018 -

Session #131- July 27, FRIDAY: SIMPLE ALWAYS WORKS!

1)migrated from 4TB to 8TB -
used parted, http://johnmeister.com/linux/FileSystems/usingParted8TB.html

2) then used rsync and dd - rsync from 4TB to 8TB took over a day... dd has been almost a week... not done...

3) using script to rsync and update files between computers -
strategy for use including using external drives kept in air tight metal box.

4) modifying a script to sequentially number files:
http://johnmeister.com/linux/Scripts/number-file-names.sh.html number files from 1 to 1,189
http://bibletech.net/BY-CHAPTER/ and then create an index that matches what's already encoded!
Will be using awk, sed, and likely perl.
Some of the scripts will be on cygwin, others on SuSE.

other scripts useful for archiving:
http://johnmeister.com/linux/Scripts/wrapper-copy-w-date.sh.html
http://johnmeister.com/linux/Scripts/wrapper-KSH-experiment.html
http://johnmeister.com/linux/Scripts/wrapper-script.html
after you get a wrapper script or PROCESS in place, you can expand it across systems
and do some things with ssh/scp and rsync:
http://johnmeister.com/linux/Scripts/rsync-directories.sh.html
http://johnmeister.com/linux/Scripts/run-now-on-all-hosts.sh.html

Session #130 - June 15, 2018 - "home brew" revision control

Session #130- June 15, FRIDAY: SIMPLE ALWAYS WORKS! - "home brew" revision control and file management

Talking with a few of the regular attenders I feel inspired to discuss the creation of a "home brew" revision control system.

I've "cooked" up a few things over the years to manage system files and notes.
Keeping it simple keeps it portable.

Simple is what you can remember... YMMV.

http://johnmeister.com/linux/Scripts/wrapper-copy-w-date.sh.html

http://johnmeister.com/linux/Scripts/wrapper-KSH-experiment.html

http://johnmeister.com/linux/Scripts/wrapper-script.html

then, after you get a wrapper script or PROCESS in place, you can expand it across systems
and do some things with ssh/scp and rsync:

http://johnmeister.com/linux/Scripts/rsync-directories.sh.html

http://johnmeister.com/linux/Scripts/run-now-on-all-hosts.sh.html

#!/bin/bash
# vicp.sh - created 2015-09-01 jm - wrapper script
# updated 2018-06-12 to add a "BAK" directory in local path, be sure to chmod 755
##################################################################################
# if desired, add an archive Directory path to copied file name
# /usr/bin/cp $1 $1.before-`date +'%Y%m%d-%H%M'` # BEFORE
# /usr/bin/cp $1 BAK/$1.after-`date +'%Y%m%d-%H%M'` # AFTER
##################################################################################
if [ ! -d BAK ] # tests for directory, if not, then mkdir...
# echo in-loop # commented to test loop - had a problem with special characters
then
mkdir BAK
# echo dirbak # comment to check process.. a space, a tick and an apostrophe...
echo "history directory made"
fi
cp $1 BAK/$1.before-`date +'%Y%m%d-%H%M'`
# ls -al BAK # added this to see that the loop worked (cutting and pasting has issues!)
vi $1
cp $1 BAK/$1.after-`date +'%Y%m%d-%H%M'`
##################################################################################

Working as a Systems Administrator you do NOT always have the luxury of advanced tools and applications...
while there are good tools available in UNIX and Linux and likely Cygwin, they are NOT installed by default,
and if they are they may not be configured. You can't trust them.

So, yeah, I know there are tools, but they're not always in YOUR tool box when you're dealing with bare metal
or on "other" systems. My focus in training and sharing is on what I've used and can remember from the real world.
If you're using a system all the time in a stable environment you may be able to add the "better" tools...
or do what I did and "grow" my scripts to do more things.

These scripts work because I've used them to manage enterprises.

I make them work, then build a web page to share them... and...
cut and paste into any environment I might find myself...
because trying to remember some of these things is a challenge...
syntax can be complex. Simple Always Works.
I'm pretty simple, and always seem to be working... ...

Session #129 - June 8, 2018 - GPARTED & SuSE 42.3 update; CygWin/BASH continued

Session #129- June 1, FRIDAY: SIMPLE ALWAYS WORKS!

SITUATION: Toshiba R600 Portege laptop, 500GB drive - SuSE 42.2 - EOL. Needed to update, and low on space.
RESOURCES: DVD with SuSE 42.3 Leap; 1TB SSD from recently deceased laptop; and Gparted on a USB stick.

Thought I would need to use EZGig or Clonezilla... EZgig was version 2... out of date, failed... downloaded v6, but
it required the hardware device... long ago deceased and disposed... Tried Clonezilla... bad disk... dug out my USB stick with
Gparted that we've used in prior session to rescue systems, and dd for cloning:
http://johnmeister.com/linux/Notes/Gparted-for-Recovery/ALL.html
http://johnmeister.com/linux/FileSystems/rescuing-failing-drive-w-dd.html

http://johnmeister.com/linux/FileSystems/Gparted-clone-expand-partition-n-upgrade-SuSE.html

But I forgot that one can "copy" partitions with Gparted... so I tested it, and it worked.

Getting the system to boot to the correct drive was a challenge... had to be careful of /dev/sda as it had the good
SuSE 42.2 with MATE... attached to a USB SATA dual drive unit was the target 1TB SSD (which had a full up MINT/MATE
environment on it with a corrupted MATE Menu, the files had already been copied to another 1TB SATA drive). And
then of course the USB stick with Gparted (Debian Linux), which was what I needed to boot to. It took a few tries
to get the correct boot device, but once Gparted started it was all good. What I ended up doing was removing
the 1TB drive from the USB/SATA "toaster" and that allowed the system to find the USB stick, once the Gparted screen
appeared and BEFORE it loaded its kernel, I reinserted the 1TB drive. If you boot into the Gparted kernel without
both drives (source and target) in place it won't work, it needs to be registered in the kernel when started.
The process steps were:

1) boot into Gparted (disk or thumbdrive) - make sure all disks are attached
2) identify drives, e.g.

/dev/sda1 swap 10GB
/dev/sda2 root 138GB (SuSE 42.2)
/dev/sda3 home 318GB

/dev/sdb1 swap 8GB
/dev/sdb2 root 989GB (Mint/Mate)

/dev/sdc1 root 512M (Gparted/Debian)

3) select /dev/sdb - create partition (gpt)
- yes, delete all partitions ; apply

4) select /dev/sda1 - copy ; select /dev/sdb, paste
(leave the same size, 10GB for 8GB of memory is adequate for swap)

5) select /dev/sda2 - copy ; select /dev/sdb, paste
(leave the same size, 138GB for the OS is adequate)

6) select /dev/sda3 - copy ; select /dev/sdb, paste
- AND expand to fill the drive 998GB or whatever.

7) after being completely certain you did this right, click APPLY and wait...
for what may be a long time...

8) once complete reboot the system verify it's ok...
this is where the real work begins.

9) disassemble the laptop and swap the drives, making sure you keep them straight.
remember, the original drive is still good and correct.

10) swap drives (YMMV), boot up to the cloned drive... good luck, you'll need it.
- at this point things can get very complicated...
- if your system used UUID instead of KERNEL devices (i.e. some cryptic string, vs. /dev/sda1)
you will have a problem... the UUID of the device you cloned will be different...
that means you'll have to edit /etc/fstab and likely go into /boot and grub.cfg and so on.
- if you can't boot at this point, and you're smart enough to use OpenSuSE, you have options.

11) Assuming you were bright enough to use OpenSuSE, you have options.
- you can fiddle with files, or boot up to the install media.
- when booting to the SuSE Install disk, select upgrade (if you select install the disk
is smart enough to realize that it's already installed, and allow you to upgrade,
which isn't something that often happens with other distros... of course, YMMV.)
- when doing the upgrade I always select at least one or two additional packages,
by doing this I make sure the system is changed so that the boot features are also changed.

12) the system will do it's upgrade and usually fix the booting issue.
- if not either dig into grub or put the old drive back in.
- once the old drive is in, modify grub.cfg and /etc/fstab to show KERNEL drivers, not UUID,
or you can get fancy and fake out the UUID on your system to make the new drive appear to be
the old drive... confused? yeah, me too... so I ignore the warning about kernel names and
go that way... however, if you swap drives around on your bus by accident, that will BITE you! be careful.
once the system boots up you can restore your old repos (non-oss) and make sure everything is working.
(I forgot to save my old repos... needed non-oss for virtualbox and VLC... not hard to add back in.).

This was way more fun than CygWin...

Session #128 - May 11, 2018 - BASH Commands in CYGWIN - continued

Session #128- May 11, FRIDAY: SIMPLE ALWAYS WORKS! just not always as fast as we'd like...

Plan to continue working with CygWin and using it for parsing information;
while not as fast as native Linux, it's cost-effective (as in free and no additional hardware required) and convenient.
I recognize that this tool is the best way of getting power users familiar with regular expressions and Linux!

I have been testing various configurations and working with others to learn more about this tool. I was able to get ssh working in Cygwin and am
researching it further. The plan is to see if we can ssh between Microsoft systems! This will greatly help me manage my computer lab!!!!
Also considering making X-windows work in Cygwin... lots to explore with this tool, one computer, one OS, but many tools!

The focus on the sessions will be about the commands and scripts,
and I will comment on how these commands relate to the Linux environment where they differ.

Using CYGWIN for these sessions provides the LOWEST COMMON DENOMINATOR to help folks learn regular expressions and Linux commands.

Session #127 - April 27, 2018 - BASH Commands in CYGWIN - continued