Linux

2017-08-17
Oracle VM - resize root disk

  1. Check current virtual disk
    [root@localhost ~]# fdisk -l /dev/xvda

Disk /dev/xvda: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000b3dc8

    Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *        2048     1026047      512000   83  Linux
/dev/xvda2         1026048    41943039    20458496   8e  Linux LVM
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2017-08-14
Linux

curl

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# Print cookies to stdout
curl -c - 'http://google.com'

Change terminal directory text color

LS_COLORS=$LS_COLORS:'di=1;32:' ; export LS_COLORS

The first number is how light or dark you want the color to be, followed by a semicolon, and then the actual number of the color.

Blue = 34
Green = 32
Light Green = 1;32
Cyan = 36
Red = 31
Purple = 35
Brown = 33
Yellow = 1;33
white = 1;37
Light Grey = 0;37
Black = 30
Dark Grey= 1;30

Soure:
https://askubuntu.com/questions/466198/how-do-i-change-the-color-for-directories-with-ls-in-the-console

List files recursively with last modified date

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find . -type f -print0 | xargs -0 ls -lt --time-style="+%F %T"

cut command

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-d -d':'     # Use : as delimeter
-c -c1-3     # 1-3 characters
   -c3-      # 3rd character to end of line
   -c-8      # start of line to 8th character
-f -f1-4,6,7 # fields 1-4, 6 and 7

cut -d':' -f1-4,6,7 test.txt

Check Linux version

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cat /etc/os-release

Authenticating to Your Server Using SSH Keys

  • Creating SSH Keys:

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    $ ssh-keygen

  • Add public key to ~/.ssh/authorized_keys on target server

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