GNU 코어유틸

1 개요

GNU Core Utilities; coreutils
GNU 코어 유틸리티; GNU 코어유틸; 코어유틸

GNU 핵심 유틸리티
UNIX계 OS에 필요한 cat, ls, rm 등의 기본 명령어 모음 패키지
CentOS 6 최소 설치 패키지 목록에 포함됨
우분투 12 기본 패키지 목록에 포함됨

2 파일 도구

`chcon`	Changes file security context (SELinux)
`chgrp`	파일 소유그룹 변경
`chown`	파일 소유자 변경
`chmod`	파일·디렉토리 퍼미션 변경
`cp`	파일·디렉토리 복사
`dd`	Copies and converts a file
`df`	Shows disk free space on file systems
`dir`	Is exactly like "`ls -C -b`". (Files are by default listed in columns and sorted vertically.)
`dircolors`	Set up color for `ls`
`install`	Copies files and set attributes
`ln`	Creates a link to a file
`ls`	Lists the files in a directory
`mkdir`	디렉토리 생성
`mkfifo`	Makes named pipes (FIFOs)
`mknod`	Makes block or character special files
`mktemp`	임시 파일(또는 폴더) 생성
`mv`	Moves files or rename files
`rm`	파일 삭제
`rmdir`	빈 디렉토리 삭제
`shred`	Overwrites a file to hide its contents, and optionally deletes it
`sync`	Flushes file system buffers
`touch`	파일의 타임스탬프 변경
`truncate`	Shrink or extend the size of a file to the specified size
`vdir`	Is exactly like "`ls -l -b`". (Files are by default listed in long format.)

3 텍스트 도구

`base64`	데이터를 base64 인코딩/디코딩하여 표준출력에 출력
`cat`	Concatenates and prints files on the standard output
`cksum`	Checksums and count the bytes in a file
`comm`	Compares two sorted files line by line
`csplit`	Splits a file into sections determined by context lines
`cut`	Removes sections from each line of files
`expand`	Converts tabs to spaces
`fmt`	Simple optimal text formatter
`fold`	Wraps each input line to fit in specified width
`head`	Outputs the first part of files
`join`	Joins lines of two files on a common field
`md5sum`	Computes and checks MD5 message digest
`nl`	Numbers lines of files
`od`	Dumps files in octal and other formats
`paste`	Merges lines of files
`ptx`	Produces a permuted index of file contents
`pr`	Converts text files for printing
`sha1sum`, `sha224sum`, `sha256sum`, `sha384sum`, `sha512sum`	Computes and checks SHA-1, SHA-224/256/384/512 message digest
`shuf`	랜덤 순열 생성
`sort`	sort lines of text files
`split`	Splits a file into pieces
`sum`	Checksums and counts the blocks in a file
`tac`	Concatenates and prints files in reverse
`tail`	Outputs the last part of files
`tr`	Translates or deletes characters
`tsort`	Performs a topological sort
`unexpand`	Converts spaces to tabs
`uniq`	Removes duplicate lines from a sorted file
`wc`	Prints the number of bytes, words, and lines in files

4 쉘 도구

`arch`	Prints machine hardware name (same as uname -m)
`basename`	Removes the path prefix from a given pathname
`chroot`	Changes the root directory
`date`	Prints/sets the system date and time
`dirname`	Strips non-directory suffix from file name
`du`	Shows disk usage on file systems
`echo`	Displays a specified line of text
`env`	환경변수 조회 및 변경
`expr`	Evaluates expressions
`factor`	Factors numbers
`false`	Does nothing, but exits unsuccessfully
`groups`	Prints the GID of which the user is a member
`hostid`	Prints the numeric identifier for the current host
`id`	Prints real/effective UID and GID
`link`	Creates a link to a file
`logname`	Print the user's login name
`nice`	Modifies scheduling priority
`nohup`	Allows a command to continue running after logging out
`pathchk`	Checks whether file names are valid or portable
`pinky`	A lightweight version of finger
`printenv`	Prints environment variables
`printf`	Formats and prints data
`pwd`	Prints the current working directory
`readlink`	심볼릭 링크 값 표시
`runcon`	Run command with specified security context
`seq`	Prints a sequence of numbers
`sleep`	Delays for a specified amount of time
`stat`	Returns data about an inode
`stty`	Changes and prints terminal line settings
`su`	Run a shell or command with substitute user and group IDs
`tee`	Sends output to multiple files
`test`	Evaluates an expression
`timeout`	Run a command with a time limit
`true`	아무것도 하지 않지만, 종료상태는 0(성공)
`tty`	터미널 이름 출력
`uname`	Prints system information
`unlink`	Removes the specified file using the `unlink` function
`uptime`	Tells how long the system has been running
`users`	Prints the user names of users currently logged into the current host
`who`	Prints a list of all users currently logged in
`whoami`	Prints the effective userid
`yes`	문자열 반복 출력

5 기타 도구

`[`	A synonym for test; this program permits expressions like [ expression ].

6 같이 보기

7 참고 자료

http://en.wikipedia.org/wiki/GNU_Core_Utilities