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40

Unplug the ethernet cable and see who gets upset. Seriously though, mystery machines like this create a lot of mental overheard for a team and often provide absolutely no business value. Talk to your boss, if no one knows what it does maybe no one cares what it does.


29

This is a pretty broad question for the Serverfault format, but here is a good start: Check for running processes and those scheduled to run at system startup. Review the running configuration of each. Look into any defined data directories. (Maybe someone installed MySQL and turned it on, but there are no databases.) Check for scheduled tasks. Check the ...


19

There are a few things you could do to try and ascertain what's running on your system. You can check which ports your server is listening on to get an idea of what's on there. A good command to use would be: [root@server ~]# netstat -tulpn Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address ...


17

Another method involves checking the /etc directory and looking at the modification dates. After a fresh install all the files in this directory should have roughly the same date/time. And since an install usually installs a lot of things people usually do not use, only the files that have a later modification date reflect the actual purpose of the server. ...


7

Check the firewall rules. With a bit of luck, it's configured for default-deny. That means there's an explicit rule for each allowed service. This is better then netstat because it can also show ports that are open for e.g for nightly backups.


5

One answer I've not seen yet: Check the most recently modified files. Logs, database files, other output files etc. may get written to still that may provide clues: find . -mtime -3 That would find modified files in the current directory and deeper, changed in the last 3 days. Increase the number 3 to an educated guess until you get some output you can ...


4

The %post section won't do what you need without some extra work - you need to do this copy inside a %post --nochroot section so you have access to the CD. You can probably issue a mount command inside %post, but using %post --nochroot is likely easier. I don't remember the source ISO layout offhand, but it'll be there somewhere.


2

Is it possible to forcefully make an user change his password after certain days? No. As far as I know the common mail protocols (POP IMAP) don't support a password change mechanism; the password either works or is doesn't. So you won't be able to that for users using regular mail clients. Webmail would be an exception, because that is almost ...


2

On Red Hat systems, ImageMagick is available in the default base package repository so you only need to run: sudo yum install ImageMagick Note that the package was built with support for X11 and Gtk+ so it has a huge amount of of dependencies – most of which should only be required for a graphical desktop (and ideally shouldn’t be installed on a head-less ...


1

You need to install package named 'kernel': yum install kernel In Oracle UEK, there are 3 types of kernel packages available: kernel kernel-transition kernel-uek Kernel obviously is RedHat Compatible Kernel (RHCK), transition package enables you to move dependencies from RHCK to Oracle kernel, and kernel-uek is actual Oracle kernel. Installing the ...


1

HP chose not to certify the G6 line for RHEL 7. Also, the CCISS and some other drivers were deprecated and not included in RHEL 7 due to lack of vendors' desire to support/certify that older hardware. See this guide for details on the switch from CCISS driver to HPSA driver, or use the HP provided CCISS driver.


1

As far as I have found, testing with CentOS 7 and a kickstart file hosted on an improperly SSL cert-ed URL, noverifyssl cannot be specified where you were trying to, in the kernel line. noverifyssl is an Anaconda flag, but Anaconda does not parse this command, initrd.img does. I tried the following tests: .. will indicate this line as it remained the ...


1

as read someplace else... each new process get entropy from /dev/random a simple way to avoid stealing the pool is a program, such as: #!/usr/bin/env python import time while True: with open('/proc/sys/kernel/random/entropy_avail', 'r') as f: print(f.read().rstrip()) time.sleep(1.0)


1

This is definitely a feasible approach. We use Ubuntu 14.04 for our host machines and run several Oracle 11g instances within Docker containers for development purposes as well. Currently (Docker 1.5) for both 11g and 12c the main issue is Docker's hard-coded shared memory limit Issue #2606. There are currently two workarounds for this: Use docker run ...


1

RedHat doesn't officially support any of this yet, but they did mostly support CentOS in Satellite 5 and most of this is adapted from that version. It's just modified to work with the new way of doing things in Satellite 6. I do have this working in a production environment; and hopefully this will help other people get there. Once you have the ...


1

FSTAB(5) Instead of giving the device explicitly, one may indicate the filesystem that is to be mounted by its UUID or LABEL (cf. e2label(8) or xfs_admin(8)), writing LABEL= or UUID=, e.g., LABEL=Boot' orUUID=3e6be9de-8139-11d1-9106-a43f08d823a6'. Otherwise, trust in udev to populate /dev/disk, but this will only tell you how things are ...


1

Edit the hosts file of your local machine (or the server running your DNS) to include the following: 192.168.5.25 mycompanysupport The location of your hosts file will vary depending upon your platform. For Windows NT and Windows 2000: C:\winnt\system32\drivers\etc For Windows XP, Windows Vista, Windows 7 or Windows 8: ...


1

The backlog option limits the number of messages that can be queued up waiting to be written to the log. So the unit of the backlog option isn't bytes or connections, but rather 'number of audit messages'. Choosing a sane value for this setting depends entirely on your system. I'd recommend starting out with the default and increasing it as needed. If you ...


1

The UID and GID for the smmsp user have to be 51/51. My system was set to use 53/53. Why, I don't know, silly. To fix, I had to: change uid/gid in /etc/passwd & /etc/group. Delete old unused "ftp" group 51. chgrp smmsp /usr/sbin/sendmail.sendmail chmod g+s /usr/sbin/sendmail.sendmail chgrp smmsp /var/spool/clientmqueue restart sendmail ...


1

You're probably referring to the old X-Windows display redirection method. On the client you'd open up a xterm and allow server B to display content on your local screen: A$ xhost +192.168.2.1 Then you telnet to server B and say you want the application displayed on machine A: A$ telnet 192.168.2.1 B$ export DISPLAY=192.168.1.1:0.0 B$ myapp When ...


1

The problem is that dbus-monitor doesn't know where to connect to as it's running as a different user/session (root). You can get the DBUS ADDRESS from the environment with something like: DBUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$(pidof -s gnome-session)/environ) dbus-monitor --session --address "$DBUS_ADDRESS" ...


1

All the documentation needed to create a Red Hat Enterprise Linux repository is located here: https://access.redhat.com/solutions/23016 Keep in mind that you should close this repository to the external world, since it contains binaries from Red Hat Inc. which may be copyrighted.



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