压缩：
[mw_shl_code=applescript,true]tar -czf 被压缩目录或文件名路径[/mw_shl_code]
解压：
[mw_shl_code=applescript,true]tar -xf 被解压 压缩包[/mw_shl_code]
说明：
[mw_shl_code=bash,true]-c 建立新的归档文件
-r 向归档文件末尾追加文件
-x 从归档文件中解出文件
-O 将文件解开到标准输出
-v 处理过程中输出相关信息
-f 对普通文件操作
-z 调用gzip来压缩归档文件，与-x联用时调用gzip完成解压缩
-Z 调用compress来压缩归档文件，与-x联用时调用compress完成解压缩[/mw_shl_code]
[查看全文]
[mw_shl_code=bash,true]Usage: su [OPTION]... [-] [USER [ARG]...]
Change the effective user id and group id to that of USER.
-, -l, --login make the shell a login shell
-c, --command=COMMAND pass a single COMMAND to the shell with -c
--session-command=COMMAND pass a single COMMAND to the shell with -c
and do not create a new session
-f, --fast pass -f to the shell (for csh or tcsh)
-m, --preserve-environment do not reset environment variables
-p same as -m
-s, --shell=SHELL run SHELL if /etc/shells allows it
--help display this help and exit
--version output version information and exit
A mere - implies -l. If USER not given, assume root.[/mw_shl_code]
例如：
[mw_shl_code=bash,true]su root[/mw_shl_code]
[查看全文]
[mw_shl_code=bash,true]Usage: rm [OPTION]... FILE...
Remove (unlink) the FILE(s).
-f, --force ignore nonexistent files, never prompt
-i, --interactive prompt before any removal
--no-preserve-root do not treat `/' specially (the default)
--preserve-root fail to operate recursively on `/'
-r, -R, --recursive remove directories and their contents recursively
-v, --verbose explain what is being done
--help display this help and exit
--version output version information and exit
By default, rm does not remove directories. Use the --recursive (-r or -R)
option to remove each listed directory, too, along with all of its contents.
To remove a file whose name starts with a `-', for example `-foo',
use one of these commands:
rm -- -foo
rm ./-foo
Note that if you use rm to remove a file, it is usually possible to recover
the contents of that file. If you want more assurance that the contents are
truly unrecoverable, consider using shred.[/mw_shl_code]
[查看全文]
[mw_shl_code=bash,true]用法：rm [选项]... 文件...
Remove (unlink) the FILE(s).
-f, --force ignore nonexistent files, never prompt
-i, --interactive prompt before any removal
--no-preserve-root 不特殊对待“/”(默认值)
--preserve-root 不允许在“/”上递归操作
-r, -R, --recursive 递归删除目录及其内容
-v, --verbose 详细显示进行的步骤
--help 显示此帮助信息并退出
--version 输出版本信息并退出
默认情况下，rm 不删除目录。使用 --recursive (-r 或 -R)选项可以删除每个列出的
目录及其下面的内容。
要删除第一个字符为“-”的文件 (例如“-foo”)，请使用以下其中一种方法：
rm -- -foo
rm ./-foo
请注意，如果使用 rm 来删除文件，通常仍可以将该文件恢复原状。如果想保证
该文件的内容无法还原，请考虑使用 shred。[/mw_shl_code]
[查看全文]
[mw_shl_code=bash,true]Usage: cp [OPTION]... [-T] SOURCE DEST
or: cp [OPTION]... SOURCE... DIRECTORY
or: cp [OPTION]... -t DIRECTORY SOURCE...
Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.
Mandatory arguments to long options are mandatory for short options too.
-a, --archive same as -dR --preserve=all
--backup[=CONTROL] make a backup of each existing destination file
-b like --backup but does not accept an argument
--copy-contents copy contents of special files when recursive
-d same as --no-dereference --preserve=link
-f, --force if an existing destination file cannot be
opened, remove it and try again
-i, --interactive prompt before overwrite
-H follow command-line symbolic links
-l, --link link files instead of copying
-L, --dereference always follow symbolic links
-P, --no-dereference never follow symbolic links
-p same as --preserve=mode,ownership,timestamps
--preserve[=ATTR_LIST] preserve the specified attributes (default:
mode,ownership,timestamps), if possible
additional attributes: context, links,
xattr, all
-c same as --preserve=context
--no-preserve=ATTR_LIST don't preserve the specified attributes
--parents use full source file name under DIRECTORY
-R, -r, --recursive copy directories recursively
--remove-destination remove each existing destination file before
attempting to open it (contrast with --force)
--sparse=WHEN control creation of sparse files
--strip-trailing-slashes remove any trailing slashes from each SOURCE
argument
-s, --symbolic-link make symbolic links instead of copying
-S, --suffix=SUFFIX override the usual backup suffix
-t, --target-directory=DIRECTORY copy all SOURCE arguments into DIRECTORY
-T, --no-target-directory treat DEST as a normal file
-u, --update copy only when the SOURCE file is newer
than the destination file or when the
destination file is missing
-v, --verbose explain what is being done
-x, --one-file-system stay on this file system
-Z, --context=CONTEXT set security context of copy to CONTEXT
--help display this help and exit
--version output version information and exit
By default, sparse SOURCE files are detected by a crude heuristic and the
corresponding DEST file is made sparse as well. That is the behavior
selected by --sparse=auto. Specify --sparse=always to create a sparse DEST
file whenever the SOURCE file contains a long enough sequence of zero bytes.
Use --sparse=never to inhibit creation of sparse files.
The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.
The version control method may be selected via the --backup option or through
the VERSION_CONTROL environment variable. Here are the values:
none, off never make backups (even if --backup is given)
numbered, t make numbered backups
existing, nil numbered if numbered backups exist, simple otherwise
simple, never always make simple backups
As a special case, cp makes a backup of SOURCE when the force and backup
options are given and SOURCE and DEST are the same name for an existing,
regular file.[/mw_shl_code]
[查看全文]
[mw_shl_code=bash,true]用法：cp [选项]... [-T] 源 目的
或：cp [选项]... 源... 目录
或：cp [选项]... -t 目录 源...
将<源>文件复制至<目的>，或将多个<源>复制至<目录>。
长选项必须用的参数在使用短选项时也是必须的。
-a, --archive same as -dR --preserve=all
--backup[=CONTROL] make a backup of each existing destination file
-b like --backup but does not accept an argument
--copy-contents copy contents of special files when recursive
-d same as --no-dereference --preserve=link
-f, --force if an existing destination file cannot be
opened, remove it and try again
-i, --interactive prompt before overwrite
-H follow command-line symbolic links
-l, --link 链接文件而不复制
-L, --dereference 总是跟随符号链接
-P, --no-dereference 从不跟随符号链接
-p same as --preserve=mode,ownership,timestamps
--preserve[=ATTR_LIST] preserve the specified attributes (default:
mode,ownership,timestamps), if possible
additional attributes: context, links,
xattr, all
-c same as --preserve=context
--no-preserve=ATTR_LIST don't preserve the specified attributes
--parents use full source file name under DIRECTORY
-R, -r, --recursive 复制目录及目录内的所有项目
--remove-destination 尝试打开目的地文件前先删除已存在的目的地
文件 (与 --force 选项作对比)
--sparse=WHEN control creation of sparse files
--strip-trailing-slashes remove any trailing slashes from each SOURCE
argument
-s, --symbolic-link make symbolic links instead of copying
-S, --suffix=SUFFIX override the usual backup suffix
-t, --target-directory=DIRECTORY copy all SOURCE arguments into DIRECTORY
-T, --no-target-directory treat DEST as a normal file
-u, --update 只在<源>文件比目的地文件新，或目的地文件
不存在时才进行复制
-v, --verbose 详细显示进行的步骤
-x, --one-file-system 不会跨越文件系统进行操作
-Z, --context=CONTEXT set security context of copy to CONTEXT
--help 显示此帮助信息并退出
--version 输出版本信息并退出
默认使用模式中，<源>文件是否 sparse 文件会由一种粗略的方式决定，而且相应
的<目的地>文件也会是 sparse 文件。此方式等于使用 --sparse=auto 选项。指定
--sparse=always 则只要<源>文件含有足够长的 0 字节都会产生 sparse 的
<目的地>文件。
使用 --sparse=never 会禁止产生 sparse 文件。
备份文件的后缀为“~”，除非以 --suffix 选项或是 SIMPLE_BACKUP_SUFFIX
环境变量指定。版本控制的方式可透过 --backup 选项或 VERSION_CONTROL 环境
变量来选择。以下是可用的变量值：
none, off 不会进行备份 (即使使用了 --backup 选项)
numbered, t 备份文件会加上数字
existing, nil 若有数字的备份文件已经存在则使用数字，否则使用普通方式备份
simple, never 永远使用普通方式备份
有一个特别情况：如果同时指定 --force 和 --backup 选项，而且<源>和<目的地>
是同一个已存在的一般文件的话，cp 会将<源>文件备份。[/mw_shl_code]
[查看全文]