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#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int stat(const char *path, struct stat *buf);
int fstat(int filedes, struct stat *buf);
int lstat(const char *path, struct stat *buf);
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struct stat {
dev_t st_dev; /* ÎļþËùÔÚÉ豸µÄ±êʶ */
ino_t st_ino; /* Îļþ½áµãºÅ */
mode_t st_mode; /* Îļþ±£»¤Ä£Ê½ */
nlink_t st_nlink; /* Ó²Á¬½ÓÊý */
uid_t st_uid; /* ÎļþÓû§±êʶ */
gid_t st_gid; /* ÎļþÓû§×é±êʶ */
dev_t st_rdev; /* ÎļþËù±íʾµÄÌØÊâÉ豸ÎļþµÄÉ豸±êʶ */
off_t st_size; /* ×Ü´óС£¬×Ö½ÚΪµ¥Î» */
blksize_t st_blksize; /* ÎļþϵͳµÄ¿é´óС */
blkcnt_t st_blocks; /* ·ÖÅ䏸ÎļþµÄ¿éµÄÊýÁ¿£¬512×Ö½ÚΪµ¥Ôª */
time_t st_atime; /* ×îºó·ÃÎÊʱ¼ä */
time_t st_mtime; /* ×îºóÐÞ¸Äʱ¼ä */
time_t st_ctime; /* ×îºó״̬¸Ä±äʱ¼ä */
};
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function show()
{
echo $0 #·µ»Ø½Å±¾±¾ÉíÃû×Ö¶ø²»ÊǺ¯ÊýÃû
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[root@localhost ~]# useradd test
[root@localhost ~]# passwd test
add user to a group:
e.g. add nexus to admin
useradd -g admin nexus
default role£º
[root@localhost ~]# useradd -D
GROUP=100
HOME=/home
INACTIVE=-1
EXPIRE=
SHELL=/bin/bash
SKEL=/etc/skel
CREATE_MAIL_SPOOL=no
de ......
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