在 AIX 下,我可以umask
使用以下命令检查所有用户:
cut -d : -f 1 /etc/passwd | while read ONELINE; do lsuser -a umask "$ONELINE"; done
但如何查看umask
Linux 下所有用户的设置呢? (su
对每个用户然后umask
命令?有没有更好的方法?)
更新1:
这对所有用户来说并不是最好的su
,因为在某些 RHEL 服务器上,少数用户的默认 shell 是暂停/关闭..:
shutdown:x:6:0:shutdown;asdf;asdf;F:/sbin:/sbin/shutdown
所以如果我su
对用户...那么服务器就会关闭?
更新2:我为非基于 su 的答案创建了赏金。
答案1
通常umask
通过配置文件在系统范围内设置/etc/login.defs
:
$ grep UMASK /etc/login.defs
UMASK 077
该值可以被覆盖,但通常不能通过/etc/bashrc
,/etc/profile
和/或用户$HOME/.bashrc
(假设他们正在使用 Bash)来覆盖。
如果您grep
在上述文件中查找“umask”,您还会在 RHEL 盒子上注意到这一点:
$ grep umask /etc/bashrc /etc/profile
/etc/bashrc: # By default, we want umask to get set. This sets it for non-login shell.
/etc/bashrc: umask 002
/etc/bashrc: umask 022
/etc/profile:# By default, we want umask to get set. This sets it for login shell
/etc/profile: umask 002
/etc/profile: umask 022
深层发掘:
/etc/bashrc
# By default, we want umask to get set. This sets it for non-login shell. # Current threshold for system reserved uid/gids is 200 # You could check uidgid reservation validity in # /usr/share/doc/setup-*/uidgid file if [ $UID -gt 199 ] && [ "`id -gn`" = "`id -un`" ]; then umask 002 else umask 022 fi
/etc/profile
# By default, we want umask to get set. This sets it for login shell # Current threshold for system reserved uid/gids is 200 # You could check uidgid reservation validity in # /usr/share/doc/setup-*/uidgid file if [ $UID -gt 199 ] && [ "`id -gn`" = "`id -un`" ]; then umask 002 else umask 022 fi
umask
因此,至少在 RHEL 系统上,002
如果您的 UID 大于 199,则为022
否则(系统帐户)。
答案2
您可以使用(以 root 身份执行)进行检查:
for user in $(awk -F: '{print $1}' /etc/passwd);
do
printf "%-10s" "$user" ; su -c 'umask' -l $user 2>/dev/null
done
为了避免检查系统用户,请执行以下操作:
for user in $(awk -F: '( $3 >= 500 ){print $1}' /etc/passwd);
do
printf "%-10s" "$user" ; su -c 'umask' -l $user 2>/dev/null
done
输出:
ram 0022
shyam 0022
suraj 0022
vinayak 0022
javed 0022