Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.

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4
votes
2answers
867 views

Mounting NFS3 using Kerberos and AD

I've got a Linux server (Centos 5.6) that needs to automount home directories from a Windows (Server 2008) NFS share using Kerberos. The share mounts (with the nobody user and group) if authentication ...
0
votes
0answers
7 views

m_split reverse operation for mbufs [closed]

I need to perform an operation to combine two mbufs as a single mbuf pointing the complete data by both the single mbufs. For instance, if mbufA --> 0xA0 to 0xB0, and mbufB --> 0xB0 to 0xC0 and these ...
1
vote
1answer
959 views

How do I get rsync to listen on two different ports via xinetd?

I have multiple servers that receive files via rsync on different ports. I'd like to merge them into the same physical server and let the clients continue to direct their files to the same port they ...
20
votes
5answers
13k views

How to _MOVE_ files with scp?

How to not copy but move files from one server to another (both Linux)? man scp didn't give me anything useful. I cannot use 'scp' then 'rm' because I must make sure the file is successfully ...
0
votes
3answers
1k views

Debian install netbeans - “No protocol specified”

When trying to run the netbeans shell installer, it gives me an error. ./netbeans-7.0.1-m1-php-linux.sh Configuring the installer... Searching for JVM on the system... Extracting installation data... ...
0
votes
0answers
22 views

RHEL6.4 server did not send a SYN/ACK packet in response to a SYN packet from AppDirector intermittent

In my case, client access this RHEL6.4 server thought AppDirector, so the TCP connection is from AppDirector to the server. According to wireshark, sometimes, RHEL server didn't respond for the first ...
1
vote
0answers
12 views

Is it possible to add support for additional OIDs in SNMPD (RHEL)

I am trying to have my monitor poll the number of ESTABLISHED TCP sessions on a Linux server that is running snmpd. The OID information I am trying to poll can be found Here . The OID is ...
0
votes
1answer
2k views

can't start mysql due to: Manager of pid-file quit without updating file

I can't start mysql due to this error: ERROR! MySQL manager or server PID file could not be found! Starting MySQL.. ERROR! Manager of pid-file quit without updating file. how can I fix this ...
0
votes
1answer
52 views

Slow I/O due to APC

I have a vps running Ubuntu 10.04 with nginx as my webserver. I use APC for php caching and I noticed my server is doing lots of disk queries which resulted me having slower I/O. I have about +50 ...
2
votes
1answer
3k views

How do you configure X11 forwarding over SSH on AIX?

Here is what I've tried. I've edited /etc/ssh/sshd_config on the remote AIX system X11Forwarding yes X11DisplayOffset 10 X11UseLocalhost yes as well as set $DISPLAY DISPLAY=localhost:10.0 export ...
3
votes
3answers
3k views

Why is ethtool not showing me all the properties for a NIC?

CentOS 5.8 | VMWare ESX 5.1 When I run ethtool eth0 I see the following: [root@foo ~]# ethtool eth0 Settings for eth0: Current message level: 0x00000007 (7) Link detected: yes ...
1
vote
2answers
529 views

php crashes with no core file and this message : apc_mmap failed

Description of the problem Regularly, cron php processes crash on our production server, which result in mails with the following body : PHP Fatal error: PHP Startup: apc_mmap: mmap failed: in ...
0
votes
0answers
14 views

Rolling your own mongodb server with WebUI for admin? [closed]

Recently we came to conclusion that we will need some pretty powerful mongodb machine. So i came to this very nice 320 USD/month Digital Ocean machine ( 12 CPU / 32 GB RAM ), but i have no previous ...
20
votes
5answers
17k views

What is “-bash: !”: event not found"

Try executing the following under a bash shell echo "Reboot your instance!" On my installation: root@domU-12-31-39-04-11-83:/usr/local/bin# bash --version GNU bash, version 4.1.5(1)-release ...
9
votes
6answers
9k views

ARP replies contain wrong MAC address

I've got a robot running linux with wired and wireless adapters. When I boot up, it connects to the wireless fine. When I assign an IP to the wired (either statically or with DHCP), it looks like it ...
38
votes
4answers
22k views

In Linux, what is the difference between “buffers” and “cache” reported by the free command?

This is an old question that I've seen from time to time. My understanding of it is rather limited (having read about the differences a long time ago, but the factoid(s) involved never really stuck). ...
0
votes
0answers
11 views

Exim4 panicking, missing /etc/vmail/<domain>/passwd file

I keep getting this error. /var/log/mail.err Jan 22 05:00:03 home exim4: ALERT: exim paniclog /var/log/exim4/paniclog has non-zero size, mail system possibly broken Checking ...
1
vote
1answer
197 views

Site performance - Akamai

We're facing performance issues in one of our servers which is hosting a website with ~50k users a month. We've been discussing different options to improve the performance and we're currently using ...
0
votes
3answers
107 views

SSL Site Sudden Performance Issues

I have a linux box running an ecommerce store. Everything is fine until the user goes to checkout. Once the user clicks checkout the system moves the user to the https service. Images and page load ...
-6
votes
1answer
96 views

How to secure a dedicated Linux box for e-commerce use? [closed]

My question has been asked, and I have done a lot of research. But I have yet to get a list of straight forward steps to get this done. I do not ask for an exhaustive explanation, just a really good ...
1
vote
3answers
530 views

How can I prevent people from looking at a listing of files in parent directory if I haven't uploaded index.html?

I haven't uploaded index.html or index.php to my root directory. How can I prevent people from looking at a listing of files in parent directory? Also, is it possible for people to obtain a list ...
4
votes
1answer
1k views

How to limit the “resident set size” per user on Linux

Normally this can be accomplished by "ulimit -m" but on Linux (at least on Centos5) "man bash" says "-m The maximum resident set size (has no effect on Linux)". So since "ulimit -m" has no effect on ...
0
votes
1answer
30 views

Is my default File System ext4

By running df -hT that shows mounted file systems, how can I know if my default FS is ext4? Also as mentioned by one of the MongoDB engineers in this video (@1:13) from M202: MONGODB ADVANCED ...
19
votes
6answers
18k views

Why would a server not send a SYN/ACK packet in response to a SYN packet

Lately, we've become aware of a TCP connection issue that is mostly limited to mac and Linux users who browse our websites. From the user perspective, it presents itself as a really long connection ...
1
vote
1answer
247 views

Apache mod_rewrite loaded and working, but not 'seen' by rssLounge application

I'm tring to install and configure RSS Lounge on my Raspberry PI (Wheezy 3.2.27). This is what I get when I go to http://localhost/rsslounge: The Apache module "mod_rewrite" is not loaded ...
1
vote
2answers
98 views

Can't find ckpasswd for inn2

I'm attempting to set up an intranet news server, inn2, and I'm stuck at setting up user authentication. My readers.conf file looks like this: auth all { auth: "ckpasswd -d <pathdb in ...
-4
votes
1answer
104 views

Very bad server response time. how to fixed? [closed]

There are many images on a heavy template of word press installed on web site here @ puttinout.com usually my server went down and we facing bad experience from our readers. Please guide me the ...
0
votes
1answer
160 views

Hddtemp and drivers

hddtemp /dev/sda /dev/sda: DELL PERC 6/i Adapter: S.M.A.R.T. not available Does this mean I need to install some type of driver on my linux server to access that information?
0
votes
1answer
21 views

Dumpcap on remote linux interface

I want to capture packets on a remote linux interface using dumpcap. I have observed that there is a command - dumpcap -i rpcap://<host>/<interface> and dumpcap -i ...
0
votes
1answer
15 views

proftpd 1.34 and files size > 2 GB

I have two local Linux (Slackware) servers. One has ProFTPD V1.34c and the other ProFTPD 1.34a. They both have files greater than 2 GB on them. Using "get" they both (a to b and b to a) stop ...
3
votes
2answers
95 views

Understanding zpool status output

I'm having difficult understanding the output after running the zpool status command: NAME STATE READ WRITE CKSUM tank ONLINE 6 0 0 raidz2-0 ONLINE ...
5
votes
7answers
874 views

Linux CLI command for ~“what is this machine”?

is there a standard command for Linux that would provide a description of the server? (Things like model, number of cores, speed...)
0
votes
1answer
24 views

Nginx Cache with PHP-FPM

I have the folowing niginx config file: server { listen 80; server_name pajilleros.com www.pajilleros.com; access_log off; location / { root ...
0
votes
1answer
15 views

Linux: Remove start entries only with file access

I need to disable a service (in this case bind9) from the default Linux startup because I keeps freezing the system at startup. I can't access the server via SSH or otherwise, i only have access to ...
0
votes
0answers
23 views

How to read/ modify freetds.conf (for ODBC) using augtool or similar in bash script?

How can I get augtool (augeas) or a similarly common tool to work with freetds.conf, so I can automate some configuration in a bash install script? This doesn't seem to work: augtool print ...
-2
votes
2answers
88 views

How can I get information about a file or folder on a Linux system?

I need to get detailed information of certain file or folder, such as chmod, changed date, which user. How can I do this?
1
vote
3answers
4k views

cannot resolve DNS server's own domain name

I have a DNS server (mega.dude - 123.123.123.123) running bind 9.4. When I: dig mega.dude I get no answer section. I have nameserver 123.123.123.123 in /etc/resolv.conf Here is my zone file: ...
-1
votes
0answers
20 views

Ubuntu Server 14.04 stops responding [closed]

This is a crosspost from askubuntu. I have set up an Ubuntu server at home to host a small web-page containing files I want to access from outside. All is working really well but sometimes if I wake ...
0
votes
1answer
930 views

understanding “ip addr change” and “ip addr replace” commands

At the moment I have following IPv4 addresses associated with eth0 interface: T60:~ # ip -V ip utility, iproute2-ss110629 T60:~ # ip addr show dev eth0 2: eth0: ...
1
vote
1answer
1k views

tap interfaces always disabled in linux bridge

I have a physical interface eth0, and I want to create two virtual interfaces and bridge them with eth0. For this purpose I do: #Create the virtual interfaces tunctl -t tap0 tunctl -t tap1 ifconfig ...
0
votes
0answers
28 views

Run a Linux GUI application as service accessible via web (VNC?) [closed]

We have a Linux GUI application (written mostly in Qt) and we've been tasked with creating a web-accessible method of running it. That is, the application will be hosted on our server(s) and the users ...
1
vote
1answer
163 views

iptables block port range with single port exception

I`ve two rules. First blocked all port from range: -A INPUT -m state --state NEW -m tcp -p tcp --match multiport --dports 200:65535 -j DROP and second open one in this range: -A INPUT -i ...
0
votes
0answers
6 views

Can the BS option cause data inconsistency with dd? [migrated]

I have a laptop partition (truecrypt) backed up with dd since it's impossible to back it up with anything else but do a raw bit by bit copy like: dd if=/dev/sda of=imagefile.img I can of course ...
0
votes
1answer
47 views

Why did Linux OOM killer activate before using all of the swap?

I have a problem where my Java process gets killed by the kernel OOM killer. I'm not sure why that is happening, because according to syslog I still had free swap space: Jan 15 08:52:24 xyz-server ...
3
votes
2answers
1k views

RPM removal does not remove delivered dirs and leaves garbage

I deliver an application via an RPM. This application delivers various directories and files. E.g. under /opt/internal/com a file structure is being copied. I was expecting that on rpm -e all ...
1
vote
0answers
20 views

Linux raw socket (layer2) - best strategy [migrated]

The context: I am thinking about the best way to process packet from nic to apps. I have 4 processes running and receiving packets from ethernet nic. They run pf_packet sockets so they receive ...
1
vote
3answers
47 views

Linux / AD integration with SSSD: how to choose what systems a user can log into?

We are trying out ActiveDirectory integration on some linux systems with SSSD. So far so good we joined the linux systems to the domain and we can log into linux systems with AD-defined users. Right ...
0
votes
2answers
2k views

Problem with apache + ssl: length mismatch error and ocasional bad request

we migrated a server from slicehost to linode recently, we copied the config from one server to the other. Everything works perfectly except that we get: Occasional errors with "Bad Request", this ...
1
vote
0answers
47 views

Slow performance due to txg_sync for ZFS 0.6.3 on Ubuntu 14.04

I am using native ZFS with "ZFS on Linux" installed from the PPA here. Setup was not a problem and I am using it in mirrored configuration with two WD 4TB Red HDDs. Unfortunately I am having ...
1
vote
0answers
38 views

OpenVPN Linux client - tls key negotiation failed to occur (FrootVPN) [migrated]

I'm using the free FrootVPN service (works flawlessly on Windows). However on Linux I can't manage to get it to work. FrootVPN's support webpage is broken so I can't message their support. I know ...