Uploading an ISO in vSphere Client

On http://communities.vmware.com/thread/258207, RParker says:

"But you shouldn't be uploading ISO to the datastore anyway, users can mount ISO from their client, or you can create an NFS store, and connect your ESX hosts to it."

But...

Select your host.
Click on the "Storage Views" tab (grey tab on the far right at the top)
Click on a Datastore in the list.
In the explorer pane list on the left you will get a list of the datastores.
Right Click on the one that you want, and click "Browse Datastore..."
In here you can create new folders, upload new files & delete files from disk.

Then you can connect to them as if they're a DVD drive.

Entry for local iso in /etc/apt/sources.list

deb file:///mnt/ubuntu-iso jaunty main restricted

(This was an Ubuntu BSD box and the iso was mounted under /mnt/ubuntu-iso)

http://ubuntuforums.org/archive/index.php/t-35807.html

Turning off Passive mode in FTP

Curl:


curl -O -P- ftp://ftp.sunfreeware.com/pub/freeware/sparc/10/xz-5.0.1-sol10-sparc-local.gz


From the cURL man page here: http://curl.haxx.se/docs/manpage.html#-P--ftp-port

or you can add:


-P-


to your ~/.curlrc

For lftp you can add this to ~/.lftprc:


set ftp:passive-mode off


Or just type the same command at the lftp prompt if you only want it for the current session.

File descriptors for read loops...

while read with a command that eats input (ssh, another read etc)

for file:


$ cat $tempfile
a b
c d
e f
g h


In ksh:


#!/bin/ksh

exec 4<$tempfile
while read -u4 first second
do
  echo first=$first
  echo second=$second
  printf "number?: "
  read NUM
  echo "name=$NUM"
  ssh localhost uname 2>/dev/null
done


in bash:


#!/bin/bash

exec 4<$tempfile
while read <&4 first second
do
  echo first=$first
  echo second=$second
  printf "number?: "
  read NUM
  echo "name=$NUM"
  ssh localhost uname 2>/dev/null
done

exec 4<&-


ksh: http://unix.derkeiler.com/Newsgroups/comp.unix.shell/2003-05/0889.html

bash: http://forums.devshed.com/unix-help-35/bash-scripting-using-file-descriptors-154812.html

Repeat after me, awk is not Perl...

What does a semicolon mean to awk?

This works:

$ /usr/bin/ps -ef | awk '/ root\ /{p++};END{print p}'


but this doesn't:

$ /usr/bin/ps -ef | awk 'BEGIN{p=0};/ root\ /{p++}END{print p}'
awk: syntax error near line 1
awk: bailing out near line 1


and this does:

$ /usr/bin/ps -ef | awk 'BEGIN{p=0}/ root\ /{p++}END{print p}'
0


and just to prove it's REALLY niggly, it's fussy about the order you give it things too:


$ /usr/bin/ps -ef | awk '/ root\ /{p++}BEGIN{p=0}END{print p}'
awk: syntax error near line 1
awk: bailing out near line 1


while this works fine:


$ /usr/bin/ps -ef | awk 'BEGIN{p=0}END{print p}'
0


Backticks can be dangerous!

For years I've preferred to use

$(command)

rather than

`command`

while shell scripting.

For me it was mostly a matter of style, but I pretty much thought that the two were equivalents.
I felt it was a bit easier to see $(...) than `...` and sometimes I need to nest commands with:

$(command $(othercommand))

which would be impossible with backticks.

THEY ARE NOT THE SAME!


#!/bin/ksh
#
#
#

for STRING in 'sample.txt' 'File: C:\\path\\to\\file.txt|Something else'
do

printf "result: "
echo "$STRING" | sed 's/^[^|]*\\\([^\\]*\)|.*$/\1/g'
echo 1
VAR_1=$(echo "$STRING" | sed 's/^[^|]*\\\([^\\]*\)|.*$/\1/g')
echo 2
VAR_2=`echo "$STRING" | sed 's/^[^|]*\\\([^\\]*\)|.*$/\1/g'`
echo 3
VAR_3=`echo "$STRING" | sed "s/^[^|]*\\\([^\\]*\)|.*$/\1/g"`
echo 4
VAR_4=`echo "$STRING" | sed 's/^[^|]*\\\\\([^\\]*\\)|.*$/\1/g'`

cat <<EOT
VAR_1: '$VAR_1'
VAR_2: '$VAR_2'
VAR_3: '$VAR_3'
VAR_4: '$VAR_4'
EOT

done


Don't blame ksh, it does the same in bash and Bourne shell.
(although $( ) syntax is not valid in Bourne shell)

Solaris:

$ uname -a
SunOS umurxd04 5.10 Generic_137138-09 i86pc i386 i86pc
$ ./try.sh
result: sample.txt
1
2
sed: command garbled: s/^[^|]*\\([^\]*\)|.*$/\1/g
3
4
VAR_1: 'sample.txt'
VAR_2: ''
VAR_3: 'sample.txt'
VAR_4: 'sample.txt'
result: file.txt
1
2
sed: command garbled: s/^[^|]*\\([^\]*\)|.*$/\1/g
3
4
VAR_1: 'file.txt'
VAR_2: ''
VAR_3: ''
VAR_4: 'file.txt'


Linux:

$ ./try.sh
sample.txt
1
2
sed: -e expression #1, char 27: Unmatched ) or \)
3
4
VAR_1: 'sample.txt'
VAR_2: ''
VAR_3: 'sample.txt'
VAR_4: 'sample.txt'
file.txt
1
2
sed: -e expression #1, char 27: Unmatched ) or \)
3
4
VAR_1: 'file.txt'
VAR_2: ''
VAR_3: ''
VAR_4: 'file.txt'


More testing:


ksh $ echo `echo '\\'`
\
ksh $ echo `echo "\\"`
"
ksh $ echo `echo "\\\"`
\



ksh $ echo $(echo '\\')
\
ksh $ echo $(echo "\\")
\
ksh $ echo $(echo "\\\")
>
> ^C



bash $ echo `echo '\\'`
\
bash $ echo `echo "\\"`
bash: command substitution: line 1: unexpected EOF while looking for matching `"'
bash: command substitution: line 2: syntax error: unexpected end of file

bash $ echo `echo "\\\"`
\



bash $ echo $(echo '\\')
\\
bash $ echo $(echo "\\")
\
bash $ echo $(echo "\\\")
>
>


git bits...

Cheat sheets



• Alexander Zeitler’s Git Cheat Sheet
• Zach Rusin’s Git Cheat Sheet
• http://cheat.errtheblog.com/s/git/
• Nate Murray’s Git Cheat Sheet


• http://www.codingdomain.com/git/tricks/


• http://help.github.com/git-cheat-sheets/


• https://git.wiki.kernel.org/index.php/Aliases

http://www.draconianoverlord.com/2010/03/04/git-config.html
http://www.sourcemage.org/Git_Guide
http://cheat.errtheblog.com/s/git
http://www.gitready.com/intermediate/2009/02/06/helpful-command-aliases.html

Toggle Character Codes

In Windows, when you enter text you can press Alt-X after it to show the hex for that character. (inversely you can type a number and do Alt-X to make the character, or hold Alt & type the number on the numeric keypad to get the character)

How to expand * on bash command line

<Esc>* in set -o vi
or <Ctrl-X>* in standard bash

http://superuser.com/questions/215950/how-to-expand-on-bash-command-line

vim one liner to convert backslashes in clipboard to percents

Windows clipboard modifier in vim...


I was exporting a whole lot of registry entries in Windows.
I would do F3 to find the next match, right click & click "Export",
then select the whole key name, the press ^C to copy
Then go to vim and press v to run the mapped macro below.
Then go to the filename box and press ^V to paste & click save.


:map v dd"+gP^Q:%s/\\/%/g^Q^MV"+y


Which looks like:


:map v dd"+gP^[:%s/\\/%/g^MV"+y


The macro takes the one line in the clipboard like:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\OpenWithProgids.reg

and converts it to:

HKEY_CURRENT_USER%Software%Microsoft%Windows%CurrentVersion%Explorer%FileExts%.htm%OpenWithProgids.reg

and copies it back to the clipboard.