[Linux command summary] Command list [Must-see for beginners]

pwd command

A Linux command that displays the full path of the current working directory location. "pwd" stands for "print working directory".

`/home/hoge/test_link`


$ pwd -L
/home/hoge/test_link

mkdir command

A Linux command that creates a new directory. "mkdir" is an abbreviation for "make directory".

`/home/hoge`


$ ls -a
hoge.txt .hidden

$ mkdir -m 666 test

$ ls- a
hoge.txt .hidden test

cd command

Linux command to move directories. "cd" is an abbreviation for "change directory".

`/home/hoge/test`


$ cd ../test2

cat command

This command outputs the file contents as standard. "cat" is an abbreviation for "concatenate".

`/home/hoge/test`


$ cat -n test.txt
     1	hoge
     2	hogehoge
     3
     4	hogehogehoge
     5
     6
     7
     8	hogehogehogehoge
     9

cp command

Linux commands used to copy files and directories. "cp" is an abbreviation for "copy".

`/home/hoge`


$ cp -r test /home/hoge/test2

ls command

This command is for displaying file and directory information. "ls" stands for "list directory contents".

`/home/hoge`


$ ls -lh
-rw-r--r-- 1 root root  11B Feb 24 17:11 hoge.txt
drwxr-xr-x 2 root root 4.0K Feb 24 17:14 test
drwxr-xr-x 2 root root 4.0K Feb 24 17:15 test2

touch command

Linux command to change the time stamp. It also has a function to create a new file by specifying a file name that does not exist.

`/home/hoge`


$ ls -lh
-rw-r--r-- 1 root root  11B Feb 24 17:11 hoge.txt
drwxr-xr-x 2 root root 4.0K Feb 24 17:14 test
drwxr-xr-x 2 root root 4.0K Feb 24 17:15 test2

$ touch -d "2020-2-25 18:30" hoge.txt

$ ls -lh
-rw-r--r-- 1 root root  11B Feb 24 18:30 hoge.txt
drwxr-xr-x 2 root root 4.0K Feb 24 17:14 test
drwxr-xr-x 2 root root 4.0K Feb 24 17:15 test2

less command

This is a Linux command to check the contents of the file.

`/home/hoge`


$ less -X hoge.txt
hogehoge
$

mv command

A command for moving files and directories. "mv" is an abbreviation for "move".

`/home/hoge/test`


$ mv -v test.txt ex.txt test.log test2
`test.txt' -> `test2/test.txt'
`ex.txt' -> `test2/ex.txt'
`test.log' -> `test2/test.log'

rm command

Linux command to delete files and directories. "rm" is an abbreviation for "remove".

`/home/hoge`


$ rm -i hoge.txt
remove hoge.txt? (y or n) y

ssh command

A Linux command for logging in to a remote host or executing a command using the ssh protocol. "ssh" is an abbreviation for "secure shell".

#IP192 as root user.168.x.Connect to x
$ ssh -l root 192.168.x.x

man command

This is a Linux command for checking the manual of each command. "man" is an abbreviation for "manual".

#View the cd command manual using cat
$ man -P cat cd

BUILTIN(1)                BSD General Commands Manual               BUILTIN(1)

NAME
     builtin, !, %, ., :, @, {, }, alias, alloc, ...

Command       External    csh(1)    sh(1)
           !             No          No        Yes
           %             No          Yes       No
           .             No          No        Yes
           :             No          Yes       Yes
           @             No          Yes       Yes...

AUTHORS
     This manual page was written by Sheldon Hearn <[email protected]>.

BSD                            February 23, 2005                           BSD

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