Another new job

Started 8 months ago.  Learning new things.  Went from Windows desktop support to Linux/Unix support.  Got a bit rusty on my Linux...  Have to learn quick.

New tool to keep handy = Gparted
      Created a bootable disk for use in partitioning hard drives.

Also learned that you can rename the .gconf and .gconfd directories from your Linux /home/username directory to get back the default Gnome environment.

DVI and HDMI link

Good site with HDMI and DVI cable information.
http://www.datapro.net/techinfo/

Microsoft Keyboard Shortcuts

http://windows.microsoft.com/en-US/windows7/Keyboard-shortcuts

I am the only one who has ever looked at my blog.  That's okay. Nothing here for anyone else anyway.

LINUX GPG and SHRED

GPG:


gpg -c <filename>   (encrypts file after prompting for password)
gpg <filename>   (opens file after prompting for password)


gpg --list-keys  (shows keys on system)
gpg --export -a user@localhost >file.asc  (exports a public key to a file.asc (e-mail@address listed in --list-keys query))
gpg --export-secret-keys -a user@localhost >file.asc  (exports secret keys to a file (that way they can be imported into another computer for decryption functions)


gpg --list-secret-keys
gpg --import <filename.asc>


SHRED:


shred -u -v <filename>   ( -u = truncate/remove file after shredding, -v = verbose )

Linux permissions

Linux permissions:




Column Value Permissions       Represented by
------------ -----------       --------------
    0           none                ---
    1        execute-only           --x
    2           write               -w-
    3     execute  and  write       -wx
    4          read-only            r--
    5    read  and  execute         r-x  
    6       read  and  write        rw-
    7  read,  write,  and  execute  rwx

Linux Crontab command notes

#crontab -l 


The structure of the crontab entries is: 


* * * * * command to be executed 
- - - - - 
| | | | | 
| | | | >----- day of week (0 - 6) (Sunday=0) 
| | | >------- month (1 - 12) 
| | >--------- day of month (1 - 31) 
| >----------- hour (0 - 23) 
>------------- min (0 - 59) 


So for example: 


* * * * * /sbin/ping -c 1 192.168.0.1 > /dev/null 


This will ping 192.168.0.1 once each minute continuously. The > /dev/null portion redirects standard output to /dev/null so that the root user is only emailed if there is an error running the command. You can change this to > /dev/null 2>&1 to also trash error output. 


To edit your crontab, run: 
#crontab -e