linux 帮助命令man用法入门

root@jbxue:~# man pwd  
PWD(1) User Commands  PWD(1)  
//注意括号中的数字 
NAME   //关于命令的名次和说明
       pwd - print name of current/working directory  
 
SYNOPSIS   //命令的几本语法
       pwd [OPTION]  
 
DESCRIPTION   //详细描述语法参数的使用方法
       Print the full filename of the current working directory.  
 
       --help display this help and exit  
 
       --version  
              output version information and exit  
 
       NOTE:  your shell may have its own version of pwd, which usually super-  
       sedes the version described here.  Please refer to your  shell's  docu-  
       mentation for details about the options it supports.  
 
AUTHOR   //作者信息
       Written by Jim Meyering.  
 
REPORTING BUGS   //作者的联系方式
       Report bugs to <bug-coreutils@gnu.org>.  
 
COPYRIGHT   //版权声明
       Copyright  (C) 2008 Free Software Foundation, Inc.  License GPLv3+: GNU  
       GPL version 3 or later <http://gnu.org/licenses/gpl.html> 
       This is free software: you are free  to  change  and  redistribute  it.  
       There is NO WARRANTY, to the extent permitted by law.  
 
SEE ALSO   //详细文件可以从哪里查询到
       getcwd(3)  
 
       The  full  documentation for pwd is maintained as a Texinfo manual.  If  
       the info and pwd programs are properly installed at your site, the com-  
       mand  
 
              info pwd  
 
       should give you access to the complete manual.  
 
GNU coreutils 6.9.92.4-f088d-dirtJanuary 2008                           PWD(1)  
~  
 
 Manual page pwd(1) line 1/48 (END)  
 

代号  内容说明  
NAME    简短的指令、资料名称说明  
SYNOPSIS    简短的指令下达语法(syntax)简介  
DESCRIPTION 较为完整的说明，这部分最好仔细看看！  
OPTIONS 针对 SYNOPSIS 部分中，有列举的所有可用的参数说明  
COMMANDS    当这个程式(软体)在执行的时候，可以在此程式(软体)中下达的指令  
FILES   这个程式或资料所使用或参考或连结到的某些档案  
SEE ALSO    可以参考的，跟这个指令或资料有相关的其他说明！  
EXAMPLE 一些可以参考的范例  
BUGS    是否有相关的臭虫！ 

按键  进行工作  
空白键 向下翻一页  
[Page Down] 向下翻一页  
[Page Up]   向上翻一页  
[Home]  去到第一页  
[End]   去到最后一页
向上键   向上滚一行
向下键   向下滚一行 
/string 向『下』搜寻 string 这个字串，如果要搜寻 www.jb200.com 的话，就输入 /www.jb200.com  
?string 向『上』搜寻 string 这个字串，如果要搜寻 www.jb200.com 的话，就输入 /www.jb200.com  
n, N    利用 / 或 ? 来搜寻字串时，可以用 n 来继续下一个搜寻 (不论是 / 或 ?) ，可以利用 N 来进行『反向』搜寻。举例来说，我以 /www.jb200.com 搜寻 www.jb200.com 字串， 那麼可以 n 继续往下查询，用 N 往上查询。若以 ?www.jb200.com 向上查询 www.jb200.com 字串， 那我可以用 n 继续『向上』查询，用 N 反向查询。  
q   结束这次的 man page 

root@jbxue:~# man -f pwd  
pwd (1)              - print name of current/working directory  
root@jbxue:~# man -f man  
man (1)              - an interface to the on-line reference manuals  
man (7)              - macros to format man pages  
root@jbxue:~# man -k man  
HEAD (1p)            - Simple command line user agent  
accessdb (8)         - dumps the content of a man-db database in a human readable format.  
apropos (1)          - search the manual page names and descriptions  
apt-cache (8)        - APT package handling utility - cache manipulator  
apt-cdrom (8)        - APT CDROM management utility  
apt-get (8)          - APT package handling utility - command-line interface  
apt-key (8)          - APT key management utility  
arp (8)              - manipulate the system ARP cache  
bash-builtins (7)    - bash built-in commands, see bash(1)  
blkid (8)            - command-line utility to locate/print block device attributes  
blockdev (8)         - call block device ioctls from the command line  
builtins (7)         - bash built-in commands, see bash(1)  
c++filt (1)          - Demangle C++ and Java symbols.  
catman (8)           - create or update the pre-formatted manual pages  
cfdisk (8)           - Curses/slang based disk partition table manipulator for Linux  
chroot (8)           - run command or interactive shell with special root directory  
chrt (1)             - manipulate real-time attributes of a process  
compress-dummy (1)   - manual page for compress-dummy - sharutils 4.6.3  
corelist (1)         - a commandline frontend to Module::CoreList  
cpan (1)             - easily interact with CPAN from the command line  
cron (8)             - daemon to execute scheduled commands (Vixie Cron)  
db4.6_printlog (1)   - Dumps Berkeley DB log files in a human-readable format  
DBI::Profile (3pm)   - Performance profiling and benchmarking for the DBI  
DBI::ProfileData (3pm) - manipulate DBI::ProfileDumper data dumps  
dbiprof (1p)         - command-line client for DBI::ProfileData  
dbmmanage (1)        - Manage user authentication files in DBM format  
defoma (1)           - Debian Font Manager, a framework for automatic font configuration.  
defoma-app (1)       - configure a specific application about fonts registered in Debian Font Manager.  
defoma-font (1)      - register/unregister font(s) to Debian Font Manager  
defoma-id (1)        - Manage id-cache of Debian Font Manager  
defoma-user (1)      - Debian Font Manager for users  
dhparam (1ssl)       - DH parameter manipulation and generation  
dotlockfile (1)      - Utility to manage lockfiles  
dpkg (1)             - package manager for Debian  
dpkg-deb (1)         - Debian package archive (.deb) manipulation tool  
dsaparam (1ssl)      - DSA parameter manipulation and generation  
dselect (1)          - Debian package management frontend  
ecparam (1ssl)       - EC parameter manipulation and generation  
fdisk (8)            - Partition table manipulator for Linux  
find2perl (1)        - translate find command lines to Perl code  
flock (1)            - Manage locks from shell scripts  
GET (1p)             - Simple command line user agent  
getopt (1)           - parse command options (enhanced)  
groff_man (7)        - groff `man' macros to support generation of man pages  
groffer (1)          - display groff files and man pages on X and tty  
grog (1)             - guess options for groff command  
hman (1)             - browse the on-line manual pages  
hosts.equiv (5)      - list of hosts and users that are granted "trusted"r command access to your system  
htdbm (1)            - Manipulate DBM password databases  
htdigest (1)         - manage user files for digest authentication  
htpasswd (1)         - Manage user files for basic authentication  
initscript (5)       - script that executes inittab commands.  
intro (1)            - Introduction to user commands  
intro (8)            - Introduction to administration and privileged commands  
ip (8)               - show / manipulate routing, devices, policy routing and tunnels  
lexgrog (1)          - parse header information in man pages  
logger (1)           - a shell command interface to the syslog(3) system log module  
logsave (8)          - save the output of a command in a logfile  
lprng_certs (1)      - lprng SSL certificate management  
lprng_index_certs (1) - lprng SSL certificate management  
lwp-request (1p)     - Simple command line user agent  
LWP::ConnCache (3pm) - Connection cache manager  
lwres_buffer (3)     - lightweight resolver buffer management  
lwres_buffer_add (3) - lightweight resolver buffer management  
lwres_buffer_back (3) - lightweight resolver buffer management  
lwres_buffer_clear (3) - lightweight resolver buffer management  
lwres_buffer_first (3) - lightweight resolver buffer management  
lwres_buffer_forward (3) - lightweight resolver buffer management  
lwres_buffer_getmem (3) - lightweight resolver buffer management  
lwres_buffer_getuint16 (3) - lightweight resolver buffer management  
lwres_buffer_getuint32 (3) - lightweight resolver buffer management  
lwres_buffer_getuint8 (3) - lightweight resolver buffer management  
lwres_buffer_init (3) - lightweight resolver buffer management  
lwres_buffer_invalidate (3) - lightweight resolver buffer management  
lwres_buffer_putmem (3) - lightweight resolver buffer management  
lwres_buffer_putuint16 (3) - lightweight resolver buffer management  
lwres_buffer_putuint32 (3) - lightweight resolver buffer management  
lwres_buffer_putuint8 (3) - lightweight resolver buffer management  
lwres_buffer_subtract (3) - lightweight resolver buffer management  
lwres_context (3)    - lightweight resolver context management  
lwres_context_allocmem (3) - lightweight resolver context management  
lwres_context_create (3) - lightweight resolver context management  
lwres_context_destroy (3) - lightweight resolver context management  
lwres_context_freemem (3) - lightweight resolver context management  
lwres_context_initserial (3) - lightweight resolver context management  
lwres_context_nextserial (3) - lightweight resolver context management  
lwres_context_sendrecv (3) - lightweight resolver context management  
magic (5)            - file command's magic pattern file  
Mail::Field (3pm)    - Base class for manipulation of mail header fields  
Mail::Header (3pm)   - manipulate MIME headers  
Mail::Internet (3pm) - manipulate email messages  
man (1)              - an interface to the on-line reference manuals  
man (7)              - macros to format man pages  
man-pages (7)        - conventions for writing Linux man pages  
man2html (1)         - format a manual page in html  
manconv (1)          - convert manual page from one encoding to another  
mandb (8)            - create or update the manual page index caches  
manpath (1)          - determine search path for manual pages  
manpath (5)          - format of the /etc/manpath.config file  
mii-tool (8)         - view, manipulate media-independent interface status  
MIME::Parser::Filer (3pm) - manage file-output of the parser  
missing (7)          - missing manual pages  
mkmanifest (1)       - makes list of file names and their DOS 8+3 equivalent  
moduli (5)           - Diffie Hellman moduli  
nohup (1)            - run a command immune to hangups, with output to a non-tty  
nroff (1)            - emulate nroff command with groff  
odbcinst (1)         - command line tool for batch ODBC configuration  
omshell (1)          - OMAPI Command Shell  
openssl (1ssl)       - OpenSSL command line tool  
pam_exec (8)         - PAM module which calls an external command  
pod2man (1)          - Convert POD data to formatted *roff input  
POST (1p)            - Simple command line user agent  
prove (1)            - - A command-line tool for running tests against Test::Harness  
qtool (8)            - manipulate sendmail queues  
rarp (8)             - manipulate the system RARP table  
route (8)            - show / manipulate the IP routing table  
runcon (1)           - run command with specified security context  
s_time (1ssl)        - SSL/TLS performance timing program  
screen (1)           - screen manager with VT100/ANSI terminal emulation  
sfdisk (8)           - Partition table manipulator for Linux  
sg (1)               - execute command as different group ID  
snmpbulkwalk (1)     - retrieve a subtree of management values using SNMP GETBULK requests  
snmpcmd (1)          - options and behaviour common to most of the Net-SNMP command-line tools  
snmpinform (1)       - sends an SNMP notification to a manager  
snmpstatus (1)       - retrieves a fixed set of management information from a network entity  
snmptrap (1)         - sends an SNMP notification to a manager  
snmpwalk (1)         - retrieve a subtree of management values using SNMP GETNEXT requests  
speed (1ssl)         - test library performance  
ssh-argv0 (1)        - replaces the old ssh command-name as hostname handling  
ssh-keygen (1)       - authentication key generation, management and conversion  
sudo (8)             - execute a command as another user  
sudoedit (8)         - execute a command as another user  
tc (8)               - show / manipulate traffic control settings  
tcsh (1)             - C shell with file name completion and command line editing  
tempfile (1)         - create a temporary file in a safe manner  
Time::Zone (3pm)     - - miscellaneous timezone manipulations routines  
undocumented (7)     - No manpage for this program, utility or function.  
update-alternatives (8) - maintain symbolic links determining default commands  
update-modules (8)   - obsolete command  
whatis (1)           - display manual page descriptions  
whereis (1)          - locate the binary, source, and manual page files for a command  
which (1)            - locate a command  
xargs (1)            - build and execute command lines from standard input  
xqmstats (8)         - Display XFS quota manager statistics from /proc  
root@jbxue:~#  

root@jbxue:~# man -f man  
man (1)              - an interface to the on-line reference manuals  
man (7)              - macros to format man pages  
root@jbxue:~# whatis man  
man (1)              - an interface to the on-line reference manuals  
man (7)              - macros to format man pages  
root@jbxue:~# man -k pwd  
pwd (1)              - print name of current/working directory  
pwdx (1)             - report current working directory of a process  
unix_chkpwd (8)      - Helper binary that verifies the password of the current user  
root@jbxue:~# apropos pwd  
pwd (1)              - print name of current/working directory  
pwdx (1)             - report current working directory of a process  
unix_chkpwd (8)      - Helper binary that verifies the password of the current user  
root@jbxue:~#