Server Fault Stack Exchange
Server Fault Stack Exchange

Most Popular

more tags
1500 questions
104
votes
2 answers

How can I connect to a Windows server using a Command Line Interface? (CLI)

Especially with the option to install Server Core in Server 2008 and above, connecting to Windows servers over a CLI is increasingly useful ability, if not one that's very widespread amongst Windows administrators. Practically every Windows GUI…
HopelessN00b
  • 53,795
  • 33
  • 135
  • 209
104
votes
12 answers

df says disk is full, but it is not

On a virtualized server running Ubuntu 10.04, df reports the following: # df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 7.4G 7.0G 0 100% / none 498M 160K 498M 1% /dev none …
Chris
  • 1,041
  • 2
  • 8
  • 3
104
votes
11 answers

How to zip/unzip files in Powershell?

Is there a one-liner that will zip/unzip files (*.zip) in PowerShell?
BlueGene
  • 2,241
  • 9
  • 30
  • 33
104
votes
12 answers

nmap find all alive hostnames and IPs in LAN

How can I issue a nmap command that shows me all the alive machines' IP addresses and corresponding hostname s in the LAN that I am connected? (if this can be done in another way/tool you surely are welcome to answer)
şaloma
  • 1,197
  • 2
  • 10
  • 9
104
votes
8 answers

What limits the maximum number of connections on a Linux server?

What kernel parameter or other settings control the maximum number of TCP sockets that can be open on a Linux server? What are the tradeoffs of allowing more connections? I noticed while load testing an Apache server with ab that it's pretty easy to…
Ben Williams
  • 2,376
  • 4
  • 21
  • 17
103
votes
8 answers

Is a wildcard CNAME DNS record valid?

I know it's valid to have a DNS A record that's a wildcard (e.g. *.mysite.com). Is it possible/valid/advised to have a wildcard CNAME record?
Ben Mills
  • 1,163
  • 2
  • 8
  • 9
103
votes
2 answers

IPTABLES - Limit rate of a specific incoming IP

I do not wish to limit the rate of a specific service. My goals is to limit rate based solely on the incoming IP address. For example using a pseudo-rule: john.domain.local (192.168.1.100) can only download from our httpd/ftp servers at "10KB/s"…
James
  • 1,117
  • 3
  • 10
  • 16
103
votes
11 answers

Cooling Server Closet - No A/C Is Possible

We're moving into a new office in an old building in London (that's England :) and are walling off a 2m x 1.3m area where the router & telephone equipment currently terminates to use as a server closet. The closet will contain: 2 24-port switches…
JamesCo
  • 993
  • 2
  • 7
  • 9
103
votes
5 answers

Should a wildcard SSL certificate secure both the root domain as well as the sub-domains?

I ask this question, because Comodo are telling me that a wildcard certificate for *.example.com will also secure the root domain example.com. So with a single certificate, both my.example.com and example.com are secured without warning from a…
josswinn
  • 1,145
  • 2
  • 7
  • 4
103
votes
6 answers

list all packages from a repository in ubuntu / debian

is there a command to see what packages are available from a certain ppa repository?
opensas
  • 1,161
  • 2
  • 8
  • 7
103
votes
2 answers

What is .crt and .key files and how to generate them?

I've the following configuration: SSLEngine on SSLCertificateFile /etc/httpd/conf/login.domain.com.crt SSLCertificateKeyFile /etc/httpd/conf/login.domain.com.key SSLCipherSuite ALL:-ADH:+HIGH:+MEDIUM:-LOW:-SSLv2:-EXP but I don't know how to…
Mohammad Ali Akbari
  • 1,763
  • 5
  • 20
  • 24
103
votes
6 answers

Tips for Securing a LAMP Server

This is a Canonical Question about Securing a LAMP stack What are the absolute guidelines for securing a LAMP server?
Aditya Shukla
  • 1,031
  • 3
  • 8
  • 3
103
votes
4 answers

How to reload screenrc without restarting screen?

After modified screenrc, how to see the changes without restarting screen?
garconcn
  • 2,388
  • 8
  • 35
  • 46
103
votes
2 answers

How to make PuTTY settings persistent?

Some PuTTY settings are valid only for the current session, and when I start it again, they are at the default value again. How can I change the default values?
Jader Dias
  • 4,705
  • 19
  • 50
  • 51
103
votes
6 answers

Adding a directory to $PATH in CentOS?

We just got our new server(s) up and we're running CentOS on them all. After successfully installing Ruby Enterprise Edition, I would now like to add the REE /bin (located at /usr/lib/ruby-enterprise/bin) directory to make it the default Ruby…
vonconrad
  • 1,281
  • 2
  • 9
  • 9
1 2 3
…
99 100