Những câu hỏi thường gặp về Linux
4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5
6:2345:respawn:/sbin/mingetty tty6
Commenting the offending line out và then fixing the errant program và testing on the command line
will allow you to see any error messages that go to standard error output (console) if the errors are not
going to the system log file. Uncomment the line và restart init with “
kill -SIGHUP 1
” or “telinit q”
to cause init to reinitialize và reread the [/etc/inittab] file.
Some systems, however, rewrite [/etc/inittab] when booting. In that case, refer to the
init
man page,
and/or the settings in [/etc/sysconfig/init].
Refer to the init và [/etc/inittab] man pages for detailed information.
Carl King
H:
FTP kêu rằng: “421 service not available, remote server has closed connection.”
Đ:
If an FTP server won’t allow logins, it is probably configured correctly, but the problem is probably
with authorizing users tại login. FTP servers in current những bản phân phối often authorize users with
the Pluggable Authentication Modules library, in which case there should be an authorization file
[/etc/pam.d/ftp]. A generic authorization file looks like this. (The line break on the first “auth” line is
for readability. The entry is actually a single, long line).
#%PAM-1.0
auth
required /lib/security/pam_listfile.so item=user
sense=deny file=/etc/ftpusers onerr=succeed
auth
required /lib/security/pam_pwdb.so shadow nullok
auth
required /lib/security/pam_shells.so
account
required /lib/security/pam_pwdb.so
session
required /lib/security/pam_pwdb.so
Also, make sure the [/etc/ftpusers] file, or whatever users file is named in the first “auth” line, is
configured correctly.
Btw, the sample [ftp] file above is actually the [ftpd/ftp.pam.sample] file from the
[ftpd-BSD-0.3.1.tar.gz] package. Many thanks to David A. Madore for this much needed port.
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