linux_base_command3

more xxx.txt

cat xxx.txt

tac xxx.txt

head xxx.txt

head -5 xxx.txt

tail -50 xxx.txt

find

find /home/uibs *xxx

whereis ls

whereis find

echo &PATH  (doc: echo %path%)

ln(链接)

ln xxx.txt 4.txt

ln -s xxx.txt 5.txt   (软链接)