Linux#コマンドメモ1

pwd

show your directory

clear

clear the terminal

drwxr?

• d:directory
• r:read
• w:write
• x:execute
• r:read

ls

list all the things in the directory

• ls /usr/

  • list the things inside usr directory

• ls ..

  • list out a back directory

• ls -l

  • display in long format

• ls -a

  • show the hidden things also

• ls -la

  • list in long format and show the hidden things also

• ls -lS

  • list the item and sort by Size

• ls -l *txt

  • list the item with .txt only

• ls -lS >path

  • list the item and sort by Size and output the result to file as path.

• ls -d */

  • list all directory

• man ls

  • got the manual of ls

cd

Change directory

• cd ~
  • go back to home directory
• cd ..
  • go back one directory
• cd /your path
  • go to directory that you want to

cat

• cat

  • enter somethings and it will echo back Ctrl+D to End

• cat yourpath.files

  • show the file

• cat yourfile1 yourfile

  • show the files

• cat -b yourfile

  • show and add the line numbers on the non-blank line

• cat -n yourfile

  • show and add the line numbers on all the lines.

• cat -s yourfile

  • show your files and decrease all the blank line to one line

• cat -E yourfile

  • show your files and add $ symobl on each of end line.!