Linux Learning Note 1

1environment variable Chapter1.1Modify view effective system environment variables1>files that involve system environment variables. Bash_profile2> The file location/root/. Bash_profile3>file Editor opens VI. bash_profile another file/etc/ Profile4>add Java_home to end of file=/usr/share/jdk1.6.0PATH= $JAVA _home/bin: $PATH class_path=. $JAVA _home/lib/dt.jar: $JAVA _home/lib/Tools.jar export java_home export PATH export CLASSPATH5>make file effective source/root/. Bash_profile Validating environment Variables export java_home export $JAVA _home

VI Command Chapter

Input directive A

Exit instruction: Q Strong back: q!

Save and exit: Wq Save As new file: W newfile

Find instructions:? _ to find the word __

/__ the word to find __

N is found but then down an n opposite direction

: Set NU Displays line number

: Set Nonu Remove line number

Direction

K

[h] [j] [L]

Input I cursor before inserting a cursor position after inserting O cursor next line insert

Delete x Delete cursor character x delete cursor before character

Delete

DD Delete Current line 5DD Delete the current row and the following 5 lines: 1,5d Delete 1 to 5 rows x Delete one character

DW Delete Current Word

3DW Delete 3 words

Copy paste

YW copy Word

y5w copy of 5 words

YY Copy Line

5yy Copy 5 rows

P Paste below current line

: 1,2co3 after first to second row to third row

: 4,5M6

[1] [1]

[2] [2]

[3] [3]

[4] [6]

[5] [4]

[6] [5]

Positioning

GG Move to file header

G move to end of file

: 20 Move to Line 20th

J Merge two lines

Shift+8 search for the word at the cursor location

Linux Learning Note 1