1 環境變量篇

1.1? 修改 查看 生效 系統環境變量

??? 1 涉及系統環境變量的文件?? -->? .bash_profile

　　　　　　　　　　　　　　 -->　/etc/profile

??? 2 該文件位置 /root/.bash_profile

??? 3 文件編輯器打開? vi .bash_profile

??? 4 文件末尾加入?

????????????????????

JAVA_HOME = /usr/share/jdk 1.6.0 PATH = $JAVA_HOME/bin:$PATH CLASS_PATH=.$JAVA_HOME/lib/dt.jar： $JAVA_HOME/lib/tools.jarexport JAVA_HOME export PATH export CLASSPATH5 文件生效source /root/.bash_profile 6 驗證環境變量export JAVA_HOMEecho $JAVA_HOME

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VI 命令篇章輸入指令 a 退出指令 :q 強退：q! 保存且退出 :wq存成新文件 :w newfile查找指令 : ？____ <要查找的單詞>/ ____ 要查的詞n finding the dedicate word then moving to the nextN oppersite direction:set nu <---show the line number :set nonu <---remove line numberdirection :kh j linput: i insert in front of the cursor a insert behind the cursoro insert in the next line of the cursor delete:x:delete the char of the cursorX :delete the char of the cursordd:delete the current row5dd:delete the currrent line and the next 5 line:1,5d delete1 to 5 linex delete one charactorvi substitute :s /cici/titi replace the line cici with titi :s/cici/titi/g replace all the cici with titi in the current line :n,$s/cici/titi the line n to the last line.each line cici replace with titi :n,$s /cici/titi/g the line n to the last line.each line cici replace with titi :.,$s/cici/titi replace all the words in the passages from the first line to the last linerepalce confirmation command.adding character c behind the comma:s/cici/titi/gc all the cici replace with titi + confirmation show line number :set nudw delete current words 3dw delete 3 wordscopy and attachyw copy word y5w copy all 5 words yy copy all the line 5yy copy 5 lines p copy after the current line :1,2co3 copy from line1 to line2 after line 3 :4,5m61 12 23 34 65 46 5location commandgg moving to the front of the fileG moving to the end of file :20 moving to line 20J merge 2 lineshift + 8 :finding the word which is in the position of cursor

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轉載于:https://www.cnblogs.com/cici-new/p/4239997.html

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