nisgrep (用于搜索NIS +表的實(shí)用程序)

瑞茲發(fā)表于 2021-02-08 09:08

瀏覽次數(shù)：

命令行 Unix&Linux命令 nisgrep

在手機(jī)上閱讀

釋放雙眼，帶上耳機(jī)，聽聽看~！

00:00

在Solaris操作系統(tǒng)上，nismatch和nisgrep是用于搜索NIS +表的實(shí)用程序。

查看英文版

1 nisgrep 運(yùn)行系統(tǒng)環(huán)境

2 nisgrep 描述

3 nisgrep 語法

4 nisgrep 例子

nisgrep 運(yùn)行系統(tǒng)環(huán)境

Unix&Linux

nisgrep 描述

nismatch和nisgrep實(shí)用程序可用于搜索NIS +表。該命令nisgrep從不同nismatch中的命令在其接受能力正則表達(dá)式 keypat為搜索條件，而不是簡單的文本匹配。

由于nisgrep使用回調(diào)函數(shù)，因此它不限于僅搜索那些在創(chuàng)建表時(shí)明確可搜索的列。這使其比nismatch更靈活，但速度更慢。

在nismatch中，服務(wù)器進(jìn)行搜索，而在nisgrep中，服務(wù)器返回所有可讀條目，然后客戶端進(jìn)行模式匹配。

在這兩個(gè)命令中，參數(shù) tablename是要搜索的表的NIS +名稱。如果僅指定一個(gè)鍵或鍵模式而不指定列名，則將其應(yīng)用于搜索第一列?？梢允褂?i>colname = key語法搜索特定的命名列。搜索多列時(shí)，僅返回所有列中匹配的條目。這等效于邏輯聯(lián)接操作。

nismatch接受另一種搜索條件形式indexedname，它是該形式的NIS +索引名稱：

[ colname=value, ... ],tablename

The utilities nismatch and nisgrep can be used to search NIS+ tables. The command nisgrep differs from the nismatch command in its ability to accept regular expressions keypat for the search criteria rather than simple text matches.

Because nisgrep uses a callback function, it is not constrained to searching only those columns that are specifically made searchable at the time of table creation. This makes it more flexible, but slower, than nismatch.

In nismatch, the server does the searching, whereas in nisgrep the server returns all the readable entries and then the client does the pattern-matching.

In both commands, the parameter tablename is the NIS+ name of the table to be searched. If only one key or key pattern is specified without the column name, then it is applied searching the first column. Specific named columns can be searched by using the colname=key syntax. When multiple columns are searched, only entries that match in all columns are returned. This is the equivalent of a logical join operation.

nismatch accepts an additional form of search criteria, indexedname, which is an NIS+ indexed name of the form:

[ colname=value, ... ],tablename

查看英文版

nisgrep 語法

nismatch [-AchMoPv] [-s sep] key tablename

nismatch [-AchMoPv] [-s sep] colname = key... tablename

nismatch [-AchMoPv] [-s sep] indexedname

nisgrep [-AchiMov] [-s sep] keypat tablename

nisgrep [-AchiMov] [-s sep] colname = keypat... tablename

選件

-A	所有數(shù)據(jù)。返回表中的數(shù)據(jù)以及初始表的串聯(lián) 路徑中表中的所有數(shù)據(jù)。
-C	僅打印符合搜索條件的條目數(shù)的計(jì)數(shù)。
-h	在包含表列名稱的匹配條目之前顯示標(biāo)題行。
-i	在比較過程中，忽略大小寫區(qū)分。
-M	僅主服務(wù)器。將查找發(fā)送到命名數(shù)據(jù)的主服務(wù)器。這樣可以確保查看最新信息，而主服務(wù)器可能會(huì)很忙。
-o	顯示匹配的NIS +對象的內(nèi)部表示。
-P	遵循串聯(lián)路徑。指定如果初始搜索失敗，則查找應(yīng)遵循表的串聯(lián)路徑。
-s sep	此選項(xiàng)指定用于分隔表列的字符。如果未指定任何字符，則使用表的默認(rèn)分隔符。
-v	詳細(xì)操作。顯示匹配條目時(shí)，請勿抑制二進(jìn)制數(shù)據(jù)的輸出。如果沒有此選項(xiàng)，二進(jìn)制數(shù)據(jù)將顯示為字符串“ * BINARY * ”。

環(huán)境

如果設(shè)置了NIS_PATH 環(huán)境變量，并且NIS +表名不是完全限定的，則將搜索指定的每個(gè)目錄，直到找到該表為止（請參見nisdefaults）。

nismatch [-AchMoPv] [-s sep] key tablename

nismatch [-AchMoPv] [-s sep] colname = key... tablename

nismatch [-AchMoPv] [-s sep] indexedname

nisgrep [-AchiMov] [-s sep] keypat tablename

nisgrep [-AchiMov] [-s sep] colname = keypat... tablename

Options

-A	All data. Return the data within the table and all of the data in tables in the initial table's concatenation path.
-c	Print only a count of the number of entries that matched the search criteria.
-h	Display a header line before the matching entries that contains the names of the table's columns.
-i	Ignore upper/lower case distinction during comparisons.
-M	Master server only. Send the lookup to the master server of the named data. This guarantees that the most up to date information is seen at the possible expense that the master server may be busy.
-o	Display the internal representation of the matching NIS+ object(s).
-P	Follow concatenation path. Specify that the lookup should follow the concatenation path of a table if the initial search is unsuccessful.
-s sep	This option specifies the character to use to separate the table columns. If no character is specified, the default separator for the table is used.
-v	Operate verbosely. Do not suppress the output of binary data when displaying matching entries. Without this option binary data is displayed as the string "*BINARY*".

Environment

If the NIS_PATH environment variable is set, and the NIS+ table name is not fully qualified, each directory specified will be searched until the table is found (see nisdefaults).

查看英文版

nisgrep 例子

nismatch name=skippy passwd.org_dir.zotz.com.

在zotz.com的org_dir子目錄中搜索名為passwd的表。域。它返回用戶名為skippy的條目。所有工作都在服務(wù)器上完成。

nisgrep 'shell=[ck]sh' passwd.org_dir.zotz.com.

與上面的示例類似，除了在passwd表中搜索名為skippy的用戶之外，它會(huì)在該表中搜索默認(rèn)外殼程序?yàn)?strong>csh或ksh的任何用戶。

nismatch name=skippy passwd.org_dir.zotz.com.

Searches a table named passwd in the org_dir subdirectory of the zotz.com. domain. It returns the entry that has the username of skippy. All the work is done on the server.

nisgrep 'shell=[ck]sh' passwd.org_dir.zotz.com.

Like the above example, except instead of searching the passwd table for a user named skippy, it searches it for any user whose default shell is either csh or ksh.

查看英文版

其他命令行

如此好文，分享給朋友