The nistbladm command is used to administer NIS+ tables. There are five primary operations that it performs: creating and deleting tables, adding entries to tables, modifying entries within tables, and removing entries from tables.
Though NIS+ does not place restrictions on the size of tables or entries, the size of data has an impact on the performance and the disk space requirements of the NIS+ server. NIS+ is not designed to store huge pieces of data, such as files; instead, pointers to files should be stored in NIS+.
NIS+ design is optimized to support 10,000 objects with a total size of 10 megabytes. If the requirements exceed the above, it is suggested that the domain hierarchy be created, or the data stored in the tables be pointers to the actual data, instead of the data itself.
When creating tables, a table type, type, and a list of column definitions must be provided.
type is a string that is stored in the table and later used by the service to verify that entries being added to it are of the correct type.
Syntax for column definitions is:
colname=[flags][,access]
flags is a combination of:
S
Searchable. Specifies that searches can be done on the column's values (see nismatch).
I
Case-insensitive (only makes sense in combination with S). Specifies that searches should ignore case.
C
Crypt. Specifies that the column's values should be encrypted.
B
Binary data (does not make sense in combination with S). If not set, the column's values are expected to be null terminated ASCIIstrings.
X
XDR encoded data (only makes sense in combination with B).
access is specified in the format as defined by the nischmod command.
When manipulating entries, this command takes two forms of entry name. The first uses a series of space separated colname=value pairs that specify column values in the entry. The second is an NIS+ indexed name, indexedname, of the form:
[ colname=value, ... ],tablename
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nistbladm 語法
nistbladm -a | -A [-D defaults] colname = value... tablename
將條目添加到NIS +表。小寫字母“ a ”和大寫字母“ A ”之間的區(qū)別在于對現(xiàn)有條目的處理。條目的內(nèi)容由命令行上的column = value對指定。將條目添加到表時(shí)，必須指定所有列的值。
通常，如果試圖將條目添加到表中以覆蓋已存在的條目，則NIS +會報(bào)告錯(cuò)誤。這樣可以防止多方添加重復(fù)的條目并使其中之一被覆蓋。如果要強(qiáng)制添加，則大寫的“ A ”指定要添加的條目，即使該條目已經(jīng)存在。此選項(xiàng)類似于修改 對條目進(jìn)行操作。
從表中刪除條目。xentry由命令行上的一系列column = value對指定，或者由指定為entryname的索引名稱指定。小寫字母“ r ”與大寫字母“ R ”的解釋之間的區(qū)別在于對非唯一輸入規(guī)范的處理。通常，當(dāng)為該條目指定的搜索條件解析為表中的多個(gè)條目時(shí)，NIS +服務(wù)器將不允許嘗試刪除該條目。但是，有時(shí)希望刪除多個(gè)條目，例如，當(dāng)您嘗試從表中刪除所有條目時(shí)。在這種情況下，使用大寫的' R'將強(qiáng)制NIS +服務(wù)器刪除所有與傳遞的搜索條件匹配的條目。如果該條件為空且未指定任何列值，那么將刪除表中的所有條目。
Adds entries to an NIS+ table. The difference between the lowercase 'a' and the uppercase 'A' is in the treatment of preexisting entries. The entry's contents are specified by the column=value pairs on the command line. Values for all columns must be specified when adding entries to a table.
Normally, NIS+ reports an error if an attempt is made to add an entry to a table that would overwrite an entry that already exists. This prevents multiple parties from adding duplicate entries and having one of them get overwritten. If you want to force the add, the uppercase 'A' specifies that the entry is to be added, even if it already exists. This option is analogous to a modify operation on the entry.
-c
Creates a table named tablename in the namespace. The table that is created must have at least one column and at least one column must be searchable.
-dtablename
Destroys the table named tablename. The table that is being destroyed must be empty. The table's contents can be deleted with the -R option below.
-e | E
Edits the entry in the table that is specified by indexdname. The indexdname must uniquely identify a single entry. It is possible to edit the value in a column that would change the indexed name of an entry.
The change (colname=value) may affect other entries in the table if the change results in an entry whose indexed name is different from indexedname and which matches that of another existing entry. In this case, the -e option will fail and an error will be reported. The -E option will force the replacement of the existing entry by the new entry (effectively removing two old entries and adding a new one).
-m
A synonym for -E. This option has been superseded by the -E option.
-r | R
Removes entries from a table. The xentry is specified by either a series of column=value pairs on the command line, or an indexed name that is specified as entryname. The difference between the interpretation of the lowercase 'r' versus the uppercase 'R' is in the treatment of non-unique entry specifications. Normally the NIS+ server will disallow an attempt to remove an entry when the search criterion specified for that entry resolves to more than one entry in the table. However, it is sometimes desirable to remove more than one entry, as when you are attempting to remove all of the entries from a table. In this case, using the uppercase 'R' will force the NIS+ server to remove all entries matching the passed search criterion. If that criterion is null and no column values specified, then all entries in the table will be removed.
-u
Updates attributes of a table. This option allows the concatenation path (-p), separation character (specified with the (-s)), column access rights, and table type string (-t) of a table to be changed. Neither the number of columns, nor the columns that are searchable may be changed.
-Ddefaults
When creating objects, this option specifies a different set of defaults to be used during this operation. The defaults string is a series of tokens separated by colons. These tokens represent the default values to be used for the generic object properties. All of the legal tokens are described below:
ttl=time
This token sets the default time-to-live for objects that are created by this command. The value time is specified in the format as defined by the nischttl command. The default value is 12 hours.
owner=ownername
This token specifies that the NIS+ principal ownername should own the created object. Normally this value is the same as the principal who is executing the command.
group=groupname
This token specifies that the group groupname should be the group owner for the object that is created. The default value is NULL.
access=rights
This token specifies the set of access rights that are to be granted for the given object. The value rights is specified in the format as defined by the nischmod command. The default value is
----rmcdr---r---
-ppath
When creating or updating a table, this option specifies the table's search path. When an nis_list() function is invoked, the user can specify the flag FOLLOW_PATH to tell the client library to continue searching tables in the table's path if the search criteria used does not yield any entries. The path consists of an ordered list of table names, separated by colons. The names in the path must be fully qualified.
-ssep
When creating or updating a table, this option specifies the table's separator character. The separator character is used by niscat when displaying tables on the standard output. Its purpose is to separate column data when the table is in ASCII form. The default value is a space.
-ttype
When updating a table, this option specifies the table's type string.
Environment
nistbladm makes use of the following environment variables:
NIS_DEFAULTS
This variable contains a defaults string that will be override the NIS+ standard defaults. If the -D switch is used those values will then override both the NIS_DEFAULTS variable and the standard defaults.
NIS_PATH
If this variable is set, and the NIS+ table name is not fully qualified, each directory specified will be searched until the table is found.
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nistbladm 例子
nistbladm -m name=robert [name=bob],hobbies
修改名為bob的條目，將名稱更改為robert。
nistbladm -m name=robert [name=bob],hobbies
Modify the entry named bob, changing the name to robert.
nistbladm (用于執(zhí)行NIS +表管理功能)
在Solaris操作系統(tǒng)上，nistbladm命令用于執(zhí)行NIS +表管理功能。
On the Solaris operating system, the nistbladm command is used to perform NIS+ table administration functions.
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1 nistbladm 運(yùn)行系統(tǒng)環(huán)境
2 nistbladm 描述
3 nistbladm 語法
4 nistbladm 例子
nistbladm 運(yùn)行系統(tǒng)環(huán)境
Unix&Linux
nistbladm 描述
該nistbladm命令用于管理NIS +表。它執(zhí)行五項(xiàng)主要操作：創(chuàng)建和刪除表，向表中添加條目，修改表中的條目以及從表中刪除條目。
盡管NIS +并不限制表或條目的大小，但數(shù)據(jù)的大小會影響NIS +服務(wù)器的性能和磁盤空間要求。NIS +并非旨在存儲大量數(shù)據(jù)，例如文件；相反，指向文件的指針應(yīng)存儲在NIS +中。
NIS +設(shè)計(jì)經(jīng)過優(yōu)化，可支持10,000個(gè)對象，總大小為10 MB。如果要求超過上述要求，則建議創(chuàng)建域?qū)哟谓Y(jié)構(gòu)，或者表中存儲的數(shù)據(jù)是指向?qū)嶋H數(shù)據(jù)的指針，而不是數(shù)據(jù)本身。
創(chuàng)建表時(shí)，必須提供表類型，類型和列定義列表。
type是存儲在表中的字符串，服務(wù)稍后使用該字符串來驗(yàn)證要添加到表中的條目的類型正確。
列定義的語法為：
flags是以下各項(xiàng)的組合：
access以nischmod命令定義的格式指定。
處理?xiàng)l目時(shí)，此命令采用兩種形式的條目名稱。第一種使用一系列以空格分隔的colname = value對，它們指定條目中的列值。第二個(gè)是NIS +索引名稱indexedname，其形式為：
The nistbladm command is used to administer NIS+ tables. There are five primary operations that it performs: creating and deleting tables, adding entries to tables, modifying entries within tables, and removing entries from tables.
Though NIS+ does not place restrictions on the size of tables or entries, the size of data has an impact on the performance and the disk space requirements of the NIS+ server. NIS+ is not designed to store huge pieces of data, such as files; instead, pointers to files should be stored in NIS+.
NIS+ design is optimized to support 10,000 objects with a total size of 10 megabytes. If the requirements exceed the above, it is suggested that the domain hierarchy be created, or the data stored in the tables be pointers to the actual data, instead of the data itself.
When creating tables, a table type, type, and a list of column definitions must be provided.
type is a string that is stored in the table and later used by the service to verify that entries being added to it are of the correct type.
Syntax for column definitions is:
flags is a combination of:
access is specified in the format as defined by the nischmod command.
When manipulating entries, this command takes two forms of entry name. The first uses a series of space separated colname=value pairs that specify column values in the entry. The second is an NIS+ indexed name, indexedname, of the form:
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nistbladm 語法
nistbladm -c [-D defaults] [-p path] [-s sep] type colname = [flags] [, access]... tablename選項(xiàng)
nistbladm支持以下選項(xiàng)：
通常，如果試圖將條目添加到表中以覆蓋已存在的條目，則NIS +會報(bào)告錯(cuò)誤。這樣可以防止多方添加重復(fù)的條目并使其中之一被覆蓋。如果要強(qiáng)制添加，則大寫的“ A ”指定要添加的條目，即使該條目已經(jīng)存在。此選項(xiàng)類似于修改 對條目進(jìn)行操作。
更改（colname = value）可能會影響表中的其他條目。在這種情況下，-e選項(xiàng)將失敗，并且將報(bào)告錯(cuò)誤。該-E選項(xiàng)將強(qiáng)制更換的新條目（有效去除兩個(gè)舊條目并添加一個(gè)新的）現(xiàn)有的條目。
環(huán)境
nistbladm使用以下環(huán)境變量：
nistbladm -c [-D defaults] [-p path] [-s sep] type colname = [flags] [, access]... tablenameOptions
The following options are supported by nistbladm:
Normally, NIS+ reports an error if an attempt is made to add an entry to a table that would overwrite an entry that already exists. This prevents multiple parties from adding duplicate entries and having one of them get overwritten. If you want to force the add, the uppercase 'A' specifies that the entry is to be added, even if it already exists. This option is analogous to a modify operation on the entry.
The change (colname=value) may affect other entries in the table if the change results in an entry whose indexed name is different from indexedname and which matches that of another existing entry. In this case, the -e option will fail and an error will be reported. The -E option will force the replacement of the existing entry by the new entry (effectively removing two old entries and adding a new one).
Environment
nistbladm makes use of the following environment variables:
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nistbladm 例子
修改名為bob的條目，將名稱更改為robert。
Modify the entry named bob, changing the name to robert.
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其他命令行
newalias | newform | newgrp | niscat | nischmod | nischown | nischttl | nisdefaults | nl | nohup | nroff | nc | nisgrep | nispasswd | nice |