terminal ptx具体用法命令怎么使用？

ptx - produce a permuted index of file contents，生成索引

用途

生成序列改变的索引。

语法

ptx [ -f ] [ -r ] [ -t ] [ -b Breakfile ] [ -g Number ] [ -w Number ] [ -i Ignore | -o Only ] [ -- ] [ Infile [ Outfile ] ]

ptx 命令遵循以下三个步骤：

执行置换，在输入行上为每一个关键字生成一行，并旋转关键字到行首。

排序改变序列的文件。

旋转已排序的行以使关键字到每行的中间。

Outfile 文件中的结果行采用以下格式：

.xx "" "before keyword" "keyword" "after keyword"这里 .xx 是由用户或 ptx 命令提供的 nroff 或 troff 宏。mptx 宏数据包提供 .xx 宏定义。

其实还有一个

apt-sortpkgs命令 可以去看看《Linux就该这么学》 里面有个专栏是 Linux命令大全(手册

coreutils 是GNU下的一个软件包，包含linux下的 ls等常用命令。这些命令的实现要依赖于shell程序。

一般在系统中都默认安装，也可自己安装或更新。

例如，安装coreutils-6.7.tar.gz ，安装后，

打开你的linux，执行如下：（Debian,gentoo例外）

[root@lee ~]# rpm -qi coreutils-5.2.1-32

Name: coreutilsRelocations: (not relocatable)

Version : 5.2.1 Vendor: (none)

Release : 32Build Date: 2006年07月13日 星期四 00时12分39秒

Install Date: 2007年03月15日 星期四 11时50分49秒 Build Host: koumei.asianux.com

Group : System Environment/Base Source RPM: coreutils-5.2.1-32.src.rpm

Size: 8089056 License: GPL

Signature : (none)

URL : ftp://alpha.gnu.org/gnu/coreutils/

Summary : The GNU core utilities: a set of tools commonly used in shell scripts

Description :

These are the GNU core utilities. This package is the combination of

the old GNU fileutils, sh-utils, and textutils packages.

它包含有三个基本的套件，文件、shell、文本，各包含的程序如下：

1、文件套件

chgrp - Changes file group ownership.

chown - Changes file ownership.

chmod - Changes file permissions.

cp - Copies files.

dd - Copies and converts a file.

df - Shows disk free space on filesystems.

dir - Gives a brief directory listing.

dircolors - Setup program for the color output of GNU ls.

du - Shows disk usage on filesystems.

install - Copies file and sets its permissions.

ln - Creates file links.

ls - Lists directory contents.

mkdir - Creates directories.

mkfifo - Creates FIFOs (named pipes).

mknod - Creates special files.

mv - Moves files.

rm - Removes (deletes) files.

rmdir - Removes empty directories.

shred - Destroy data in files.

sync - Synchronizes filesystem buffers and disk.

touch - Changes file timestamps.

vdir - Long directory listing.

2、shell套件

[ - Check file types and compare values

basename - Removes the path prefix from a given pathname.

chroot - Changes the root directory.

date - Prints/sets the system date and time.

dirname - Removes the last level or filename from a given pathname.

echo - Prints a line of text.

env - Displays/modifies the environment.

expr - Evaluates expressions.

factor - Prints prime factors.

false - Returns an unsuccessful exit status.

groups - Print the groups that the user is a member of.

hostid - Print the numeric identifier for the current host

hostname - Print or set the machine name.

id - Print real/effective uid/gid.

logname - Print current login name.

nice - Modify scheduling priority.

nohup - Allows a command to continue running after logging out.

pathchk - Check file name portability.

pinky - Lightweight finger

printenv - Prints environment variables.

printf - Formats and prints data.

pwd - Print the current working directory.

seq - Print numeric sequences.

sleep - Suspends execution for a specified time.

stty - Print/change terminal settings.

su - Allows you to adopt the id of another user or superuser.

tee - Sends output to multiple files.

test - Evaluates an expression.

true - Returns a successful exit status.

tty - Print terminal name.

uname - Print system information.

users - Print current user names.

who - Print a list of all users currently logged in.

whoami - Print effective user id.

yes - Print a string repeatedly.

3、文本 *** 作套件

cat - concatenate files and print to the standard output

cksum - checksum and count the bytes in a file

comm - compare two sorted files line by line

csplit - split a file into sections determined by context lines

cut - remove sections from each line of files

expand - convert tabs to spaces

fmt - simple optimal text formatter

fold - wrap each input line to fit in specified width

join - join lines of two files on a common field

md5sum - compute and check MD5 message digest

nl - number lines of files

od - dump files in octal and other formats

paste - merge lines of files

pr - convert text files for printing

ptx - produce a permuted index of file contents

sort - sort lines of text files

split - split a file into pieces

sum - checksum and count the blocks in a file

tac - concatenate and print files in reverse

tail - output the last part of files

tr - translate or delete characters

tsort - perform topological sort

unexpand - convert spaces to tabs

uniq - remove duplicate lines from a sorted file

wc - print the number of bytes, words, and lines in files

head - output the first part of files

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