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2d
comment how to adjust the boot sequence using systemd
systemd certainly has its flaws, but this particular issue isn't entirely its fault. What's going wrong here is that the unit file that handles setting up networking returns 'all done!' before it's actually finished. If someone using sysvinit with a networking script that backgrounded the call to dhcpcd you could potentially run into the same problem if it got to the postfix launch before dhcpcd actually finished; it'd just be less likely because of the linear boot sequence.
2d
comment Postfix: error while loading shared libraries: libmysqlclient.so.16
This kind of issue is generally what happens when you ignore your distribution's package management system and manually install binary packages without checking dependencies. Was there a reason you did that?
Apr
28
comment Using crontab to start redshift on boot?
You're only seeing the grep redshift command. redshift isn't running. That said, I've looked at the indicated duplicate and it does in fact answer your question as well -- in short, you're doing it wrong by trying to start redshift before it has an X session to latch on to.
Apr
28
comment Using crontab to start redshift on boot?
@StephenKitt No indication that the asker is using upstart, though.
Apr
28
comment How to mount USB Pendrive - CentOS 7
Update your question to elaborate on the things I mentioned and I'll cheerfully retract my close vote.
Apr
28
comment How to mount USB Pendrive - CentOS 7
Need a bit more information to answer this one. What output do you see when you check dmesg after you plug it in? What does lsusb have to say? What do you mean when you say "I can't open it"? What did you try, what error did you get?
Apr
28
comment How can I see the whole file and also wait for more data to be added to that file?
Less also doesn't follow a growing file.
Apr
21
comment Setup a common /opt such that both my Linux Distributions can use it
Possible, but you'd have to skip all the usual package management on either distro and do manual installs of pretty much everything -- and then keep the dependencies sorted and parallel on your own as well. Good luck.
Apr
18
comment How can I test if a file in /root exists without su to root?
@user164825 If a non-root user has read access to /root/, something has gone very wrong with your system setup.
Apr
18
comment How can I test if a file in /root exists without su to root?
The issue isn't with the file 1.txt, it's that root's home directory isn't world-readable and really shouldn't be.
Apr
15
comment Do light color codes work across all distros and terminals?
Distros, yes. Terminals, probably not.
Apr
5
comment Check IP is in Range of Whitelist Array
Are you sure you want to use shell script for this?
Apr
5
comment How can I create Local Loopback on Linux?
Note that in virtually all distributions worth the name, loopback is already configured out of the box.
Apr
1
comment How can I create a two-way voice communication system that works over the local network?
In a pinch you could probably netcat the digital in/out ports....
Mar
30
comment n-factor SSH authentication for CentOS 7
@Codemed to clarify: 2FA is not a bad idea, and there is no reason it can't be done well. The way you're trying to do it isn't it, though; this answer attempts to point you in the direction of something that is likely to work.
Mar
30
comment n-factor SSH authentication for CentOS 7
@codemed Just because you don't like being told that your original question was poorly informed doesn't mean this is a bad answer. The "instructions" you ask for don't exist because the way you say you're trying to set things up won't work. You were trying to use GCC to compile a shell script, for cryin' out loud.
Mar
23
comment Why don't I manage to enable connection on port 80 and 443?
Debian does not automatically install a webserver unless you tell it to during installation. If you want to run one, use apt-get install apache2 or apt-get install nginx or apt-get install lighttpd, as per taste.
Mar
23
comment Why don't I manage to enable connection on port 80 and 443?
Then you don't have anything listening on those ports, which is why you get connection refused.
Mar
23
comment Why don't I manage to enable connection on port 80 and 443?
Do you actually have anything listening on that port? Say, apache or nginx or lighttpd ? Use the netstat -pat command to see what if anything is listening on which TCP port(s)
Mar
14
comment User still has sudo privileges despite being removed from all groups
group status doesn't update until the next login session. This works both ways.