请问如下命令是干嘛用的，谁帮忙解释下，很感谢！

dsy851009

#!/usr/bin/env bash


pdsh -w ^/opt/shell/master/cluster_command/adam_agent.txt $@

帮忙解释详细点，每个参数都代表什么意思，非常感谢！在线等，呵呵

rdcwayx

自己要先看一下帮助

man pdsh

-w TARGETS,...

Target and or filter the specified list of hosts. Do not use with any other node selection options (e.g. -a, -g, if they are available). No spaces are allowed in the comma-separated list. Arguments in the TARGETS list may include normal host names, a range of hosts in hostlist format (See HOSTLIST EXPRESSIONS), or a single '-' character to read the list of hosts on stdin.
If a host or hostlist is preceded by a '-' character, this causes those hosts to be explicitly excluded. If the argument is preceded by a single '^' character, it is taken to be the path to file containing a list of hosts, one per line. If the item begins with a '/' character, it is taken as a regular expression on which to filter the list of hosts (a regex argument may also be optionally trailed by another '/', e.g. /node.*/). A regex or file name argument may also be preceeded by a minus '-' to exclude instead of include thoses hosts.

A list of hosts may also be preceded by "user@" to specify a remote username other than the default, or "rcmd_type:" to specify an alternate rcmd connection type for these hosts. When used together, the rcmd type must be specified first, e.g. "ssh:user1@host0" would use ssh to connect to host0 as user "user1."

1. $@
   
2. 与$*同义,但是每个参数都是一个独立的""引用字串,这就意味着参数被完整地传递,并没有被解释和扩展.这也意味着,每个参数列表中的每个参数都被当成一个独立的单词.
   
3. 注意:"$@"必须被""引用.

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rdcwayx

dsy851009 发表于 2012-11-07 12:38
#!/usr/bin/env bash

自己要先看一下帮助

1. man pdsh
   
2. 
   
3. -w TARGETS,...
   
4. 
   
5. Target and or filter the specified list of hosts. Do not use with any other node selection options (e.g. -a, -g, if they are available). No spaces are allowed in the comma-separated list. Arguments in the TARGETS list may include normal host names, a range of hosts in hostlist format (See HOSTLIST EXPRESSIONS), or a single '-' character to read the list of hosts on stdin.
   
6. If a host or hostlist is preceded by a '-' character, this causes those hosts to be explicitly excluded. If the argument is preceded by a single '^' character, it is taken to be the path to file containing a list of hosts, one per line. If the item begins with a '/' character, it is taken as a regular expression on which to filter the list of hosts (a regex argument may also be optionally trailed by another '/', e.g. /node.*/). A regex or file name argument may also be preceeded by a minus '-' to exclude instead of include thoses hosts.

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A list of hosts may also be preceded by "user@" to specify a remote username other than the default, or "rcmd_type:" to specify an alternate rcmd connection type for these hosts. When used together, the rcmd type must be specified first, e.g. "ssh:user1@host0" would use ssh to connect to host0 as user "user1."

1. $@
   
2. 与$*同义,但是每个参数都是一个独立的""引用字串,这就意味着参数被完整地传递,并没有被解释和扩展.这也意味着,每个参数列表中的每个参数都被当成一个独立的单词.
   
3. 注意:"$@"必须被""引用.

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dsy851009

回复 3# rdcwayx
谢谢斑竹~~~~~~~~~

   

力哥丶

$@                 所有这些参数都分别被双引号引住。若一个脚本接收到两个参数，$@等价于$1$2

^ 以谁为开头。

^[^1] 除了1开头的

dsy851009

希望这样的回答~~~回复 5# 力哥丶


   

dsy851009

脚本名称叫test.sh 入参三个: 1 2 3运行test.sh 1 2 3后$*为"1 2 3"（一起被引号包住）$@为"1" "2" "3"（分别被包住）$#为3（参数数量）

dsy851009

pdsh 是对集群进行批量操作的命令

dsy851009

如果目标前为“^”，则用来指示包含目标主机的文件，文件中每行一个该机名