alter user 사용자 identified by 변경할 비밀번호;
alter user 사용자 identified by 변경할 비밀번호;
[ASCII] 특수문자 셋 정의
ISO-8859-1에 정의된 아스키코드의 특수문자 셋 정의
NUL (null)
SOH (start of heading)
STX (start of text)
ETX (end of text)
EOT (end of transmission) - Not the same as ETB
ENQ (enquiry)
ACK (acknowledge)
BEL (bell) - Caused teletype machines to ring a bell. Causes a beep in many common terminals and terminal emulation programs.
BS (backspace) - Moves the cursor (or print head) move backwards (left) one space.
HT (horizontal tab) - Moves the cursor (or print head) right to the next tab stop.
The spacing of tab stops is dependent on the output device, but is often either 8 or 10.
LF (NL line feed, new line) - Moves the cursor (or print head) to a new line.
On Unix systems, moves to a new line AND all the way to the left.
VT (vertical tab)
FF (form feed) - Advances paper to the top of the next page (if the output device is a printer).
CR (carriage return) - Moves the cursor all the way to the left, but does not advance to the next line.
SO (shift out) - Switches output device to alternate character set.
SI (shift in) - Switches output device back to default character set.
DLE (data link escape)
DC1 (device control 1)
DC2 (device control 2)
DC3 (device control 3)
DC4 (device control 4)
NAK (negative acknowledge)
SYN (synchronous idle)
ETB (end of transmission block) - Not the same as EOT
CAN (cancel)
EM (end of medium)
SUB (substitute)
ESC (escape)
FS (file separator)
GS (group separator)
RS (record separator)
US (unit separator)
---------------------------------------------------------------------------------------------------------------
00 000 NUL (문자열의 끝: Null char)
01 001 SOH (Start of Heading)
02 002 STX (Start of Text)
03 003 ETX (End of Text)
04 004 EOT (End of Transmission)
05 005 ENQ (Enquiry)
06 006 ACK (Acknowledgment)
07 007 BEL (비프음: Bell)
08 008 BS (백스페이스: Backspace)
09 009 HT (탭: Horizontal Tab)
0A 010 LF (줄바꿈: NL Line Feed/New Line)
0B 011 VT (Vertical Tab)
0C 012 FF (프린터 용지 먹임: Form Feed/New Page)
0D 013 CR (줄바꿈: Carriage Return)
0E 014 SO (Shift Out)
0F 015 SI (Shift In)
10 016 DLE (Data Link Escape)
11 017 DC1 (Device Control 1)
12 018 DC2 (Device Control 2)
13 019 DC3 (Device Control 3)
14 020 DC4 (Device Control 4)
15 021 NAK (Negative Acknowledge)
16 022 SYN (Synchronous Idle)
17 023 ETB (End of Transmission Block)
18 024 CAN (Cancel)
19 025 EM (End of Medium)
1A 026 SUB (Substitute / End of File; EOF)
1B 027 ESC (Esc키: Escape)
1C 028 FS (File Separator)
1D 029 GS (Group Separator)
1E 030 RS (Request to Send / Record Separator)
1F 031 US (Unit Separator)
출처 : http://tisiphone.tistory.com/?page=101
[리눅스] ssh-keygen 을 이용한 ssh 자동로그인 하기
ssh-keygen을 이용하여 로그인 과정없이 원격지 사이트에 로그인 할 수 있습니다.
방법)
1. localhost 컴퓨터에서 ssh-keygen 명령어를 입력합니다.(엔터를 3번 내립다 칩니다.)
하단에 The key fingerprint is : 라고 나오면 성공한 것입니다.
2. localhost 컴퓨터에서 ssh-copy-id -i ~/.ssh/id_rsa.pub 리모트 IP 를 입력합니다.
보기에서는 리모트 IP가 192.168.31.133 입니다.
3. ssh 리모트 IP 를 하면 비밀번호 인증 과정없이 바로 접속됨을 확인할 수 있습니다.