Linux命令——getconf
2024-08-21 04:40:17
简介
getconf本身是个ELF可执行文件,用于获取系统信息
用法
getconf -a可以获取全部系统信息
对于这个命令,记住几个常用的信息获取方法就行
getconf PAGE_SIZE 查看系统内存分页大小
getconf LONG_BIT 看linux是32位还是64位最简单的方法
_CS_PATH | Value for the PATH environment variable used to find commands. |
ARG_MAX | Maximum length, in bytes, of the arguments for one of the exec subroutines, including environment data. |
BC_BASE_MAX | Maximum value allowed for the obase variable with the bc command. |
BC_DIM_MAX | Maximum number of elements permitted in an array by the bc command. |
BC_SCALE_MAX | Maximum value allowed for the scale variable with the bc command. |
BC_STRING_MAX | Maximum length of a string constant accepted by the bc command. |
CHARCLASS_NAME_MAX | Maximum number of bytes in a character class name. |
CHAR_BIT | Number of bits in a type character. |
CHAR_MAX | Maximum value of a type character. |
CHAR_MIN | Minimum value of a type character. |
CHILD_MAX | Maximum number of simultaneous processes for each real user ID. |
CLK_TCK | Number of clock ticks per second returned by the time subroutine. |
COLL_WEIGHTS_MAX | Maximum number of weights that can be assigned to an entry in the LC_COLLATE locale stanza in a locale-definition file. |
CS_PATH | Value of the PATH environment variable used to find commands. |
EXPR_NEST_MAX | Maximum number of expressions that can be nested within parentheses by the expr command. |
INT_MAX | Maximum value of a type int. |
INT_MIN | Minimum value of a type int. |
LINE_MAX | Maximum length, in bytes, of a command's input line (either standard input or another file) when the utility is described as processing text files. The length includes room for the trailing new-line character. |
LONG_BIT | Number of bits in a type long int. |
LONG_MAX | Maximum value of a type long int. |
LONG_MIN | Minimum value of a type long int. |
MB_LEN_MAX | Maximum number of bytes in a character for any supported locale. |
NGROUPS_MAX | Maximum number of simultaneous supplementary group IDs for each process. |
NL_ARGMAX | Maximum value of digit in calls to the printf and scanf subroutines. |
NL_LANGMAX | Maximum number of bytes in a LANG name. |
NL_MSGMAX | Maximum message number. |
NL_NMAX | Maximum number of bytes in an N-to-1 collation mapping. |
NL_SETMAX | Maximum set number. |
NL_TEXTMAX | Maximum number of bytes in a message string. |
NZERO | Default process priority. |
OPEN_MAX | Maximum number of files that one process can have open at one time. |
PATH | Sequence of colon-separated path prefixes used to find commands. |
RE_DUP_MAX | Maximum number of repeated occurrences of a regular expression permitted when using the interval-notation parameters, such as the m and n parameters with the ed command. |
SCHAR_MAX | Maximum value of a type signed char. |
SCHAR_MIN | Minimum value of a type signed char. |
SHRT_MAX | Maximum value of a type short. |
SHRT_MIN | Minimum value of a type short. |
SSIZE_MAX | Maximum value of an object of type ssize_t. |
STREAM_MAX | Number of streams that one process can have open at one time. |
TMP_MAX | Minimum number of unique path names generated by the tmpnam subroutine. Maximum number of times an application can reliably call the tmpnam subroutine. |
TZNAME_MAX | Maximum number of bytes supported for the name of a time zone (not the length of the TZ environment variable). |
UCHAR_MAX | Maximum value of a type unsigned char. |
UINT_MAX | Maximum value of a type unsigned int. |
ULONG_MAX | Maximum value of a type unsigned long int. |
USHRT_MAX | Maximum value of a type unsigned short int. |
WORD_BIT | Number of bits in a word or type int |
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