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  • Durable laptop power adapter?

    - by snitzr
    I'm on my third power adapter for my HP Pavilion dv4-1435dx in less than one year. I'm not abusing them. I used Mac laptops for 10 years (before needing to switch to a PC) without a problem. I tried a Targus universal power adapter, but it wouldn't charge my PC, it worked fine on another laptop http://www.targus.com/us/product_details.aspx?sku=APA6911US Any suggestion for a more durable and reliable power adapter?

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  • Linux authentication via ADS -- allowing only specific groups in PAM

    - by Kenaniah
    I'm taking the samba / winbind / PAM route to authenticate users on our linux servers from our Active Directory domain. Everything works, but I want to limit what AD groups are allowed to authenticate. Winbind / PAM currently allows any enabled user account in the active directory, and pam_winbind.so doesn't seem to heed the require_membership_of=MYDOMAIN\\mygroup parameter. Doesn't matter if I set it in the /etc/pam.d/system-auth or /etc/security/pam_winbind.conf files. How can I force winbind to honor the require_membership_of setting? Using CentOS 5.5 with up-to-date packages. Update: turns out that PAM always allows root to pass through auth, by virtue of the fact that it's root. So as long as the account exists, root will pass auth. Any other account is subjected to the auth constraints. Update 2: require_membership_of seems to be working, except for when the requesting user has the root uid. In that case, the login succeeds regardless of the require_membership_of setting. This is not an issue for any other account. How can I configure PAM to force the require_membership_of check even when the current user is root? Current PAM config is below: auth sufficient pam_winbind.so auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 500 quiet auth required pam_deny.so account sufficient pam_winbind.so account sufficient pam_localuser.so account required pam_unix.so broken_shadow password ..... (excluded for brevity) session required pam_winbind.so session required pam_mkhomedir.so skel=/etc/skel umask=0077 session required pam_limits.so session required pam_unix.so require_memebership_of is currently set in the /etc/security/pam_winbind.conf file, and is working (except for the root case outlined above).

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  • HAproxy roundrobin balancing does not appear to be distributing evently

    - by andrew
    Hello, I know that with loaded servers, roundrobin in HAproxy (1.4.4) does not evenly distribute, but my servers are currently getting NO traffic (test setup), and roundrobin balancing does www1,www1,www1,www1,www1,...www2,www2,www2,...,www1... I'm verifying this by having the script being run on each server cat /etc/HOSTNAME (slackware). I need to have it switch back and forth each time to test some session stuff (stored in shared memcached) but am having trouble getting it to switch between my two web servers on each request. global log 127.0.0.1 local0 warning maxconn 4096 chroot /usr/share/haproxy pidfile /var/run/haproxy.pid uid 99 gid 99 daemon defaults balance roundrobin fullconn 100 maxconn 4096 mode http option dontlognull option http-server-close option forwardfor option redispatch retries 3 timeout connect 5000 timeout client 20000 timeout server 60000 timeout queue 60000 stats enable stats uri /haproxy stats auth ***:*** frontend www *:80 log global acl is_upload hdr_dom(host) -i uploads.site.com acl is_api hdr_dom(host) -i api.site.com acl is_dev hdr_dom(host) -i dev.site.com acl is_apidev hdr_dom(host) -i apidev.site.com use_backend uploads.site.com if is_upload use_backend api.site.com if is_api use_backend dev.site.com if is_dev !is_apidev default_backend site.com backend site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 backend api.site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:api.site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 backend dev.site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:dev.site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 backend uploads.site.com option httpchk HEAD /alive.php HTTP/1.1\r\nHost:uploads.site.com server www1 1.1.1.1:8080 weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 server www2 1.1.1.2:8080 backup weight 10 minconn 5 maxconn 25 check inter 2000 rise 2 fall 2 So basically, I have some different back-ends (I've verified the ACLs are working), with the default option "roundrobin" selected. I've tried removing weights, removing the minconn/maxconn/fullconn attributes for all servers (not just the backend I'm testing), tried removing the ACLs, etc. I've been testing on dev.site.com BTW. Anyone see a reason why I can't get something like www1,www2,www1,www2,...? Also, this is one of my first questions on here, so please let me know if I left anything needed out of my post. Thanks!

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  • Can two Identical devices be present on the same bus in any PCI Topology

    - by vaibbhav
    As per the PCI standard, devices are identified on the basis of Vendor Id, Device Id and the bus no. All devices of same type have identical vendor id and device id. If I put two such devices on the same bus say bus 0. How will the PCI Software Subsystem distinguish between the two? If such a case is not possible in PCI, then can such thing be possible through PCI Express Switch?

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  • Remote Desktop to Windows 2008 hosted in VirtualBox makes host unresponsive

    - by Robert Wagner
    I have installed Windows 2008 R2 SP1 in a VirtualBox VM. It works fine, except that if I Remote Desktop (RDP) to the VM from the host (machine running VirtualBox, Windows 7 SP1), after a minute or so the windows shell becomes unresponsive. I can no longer start task manager, open the start menu or switch applications. Keyboard input also drops some keys. Mouse movement is not affected. Any idea what is causing this? NB: This is Windows RDP, not the remote display built into VirtualBox

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  • udp expected behaviour not responding to test result

    - by ernst
    I have a local network topology that is structured as follows: three hosts and a switch in the middle. I am using a switch that supports 10,100,1000 Mbit/s full/half duplex connection. I have configured the hosts with a static ip 172.16.0.1-2-3/25. This is the output of ifconfig eth0 Link encap: Ethernet HWaddr ***** inet addr:172.16.0.3 Bcast:172.16.0.127 Mask:255.255.255.128 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:16 The output on H1 and H2 is perfectly matchable They are mutually reachable since i have tested the network with ping. I have forced the ethernet interface to work at 10M with ethtool -s eth0 speed 10 duplex full autoneg on this is the output of ethtool eth0 supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full S upported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Full Advertised pause frame use: Symmetric A dvertised auto-negotiation: Yes Speed: 10Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: g Wake-on: d Current message level: 0x000000ff (255) drv probe link timer ifdown ifup rx_err tx_err Link detected: yes – I am doing an experimental test using nttcp to calculate the GOODPUT in the case that H1 and H2 at the same time send data to H3. Since the three links have the same forced capability and the amount of arrving data speed is 10 from H1+10 from H2--20M to H3 it would be expected a bottleneck effect and, due to the non reliable nature of udp, a packet loss. But this doesn't appen since the output of nttcp application shows the same number of byte sended and received. this is the output of nttcp on h3 nttcp -T -r -u 172.16.0.2 & nttcp -T -r -u 172.16.0.1 [1] 4071 Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s CPU-C/s l 8388608 13.74 0.05 4.8848 1398.0140 2049 149.14 42684.8 Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s CPU-C/s l 8388608 14.02 0.05 4.7872 1398.0140 2049 146.17 42684.8 1 8388608 13.56 0.06 4.9500 1118.4065 2051 151.28 34181.1 1 8388608 13.89 0.06 4.8310 1198.3084 2051 147.65 36623.0 – How is this possible? Am i missing something? Any help will be gratefully apprecciated, Best regards

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  • Is USB supported in safe mode on XP?

    - by Hugh Allen
    According Microsoft, "Universal Serial Bus Devices Do Not Work in Safe Mode" under XP. However, in my testing this is incorrect. USB keyboards, mice and flash drives seem to work fine in safe mode (I made sure the BIOS was not providing support). This makes sense because a failure of a standard input device would be, in Microsoft parlance, a "bad user experience". So, Is USB supported in safe mode on XP? If your answer is no (agreeing with Microsoft), please provide a test case, preferably in a virtual machine, where a standard HID keyboard or mouse fails. Please state hardware / BIOS / OS configuration. Note that you will need a PS/2 keyboard attached in addition to your USB device(s) in order to use the boot menu. Virtual machine software usually emulates a PS/2 keyboard. Alternatively, you could add the /safeboot switch to boot.ini. If your answer is yes, please provide a link to some supporting documentation (either from Microsoft or someone authoritative). Your answer might be "devices X, Y and Z are supported but nothing else", in which case also give a link.

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  • How to get back to an active minibuffer prompt in emacs without the mouse

    - by Ryan Thompson
    In emacs, sometimes I will be in the middle of finding a file or switching buffers or doing something in the minibuffer, and I will click somewhere else for some reason. When I go back, the only way to make the minibuffer prompt active again is to click inside the minibuffer, which is annoying because it is a thin area. Is there any way to switch back to an active minibuffer prompt without using the mouse?

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  • Making to the DNS on two different VPNs play nice.

    - by NitroxDM
    Setup: I have two separate networks I need to connect to at the same time. VPN 1 PPTP IP : 192.168.2.0/24 DNS : 192.168.2.32; 192.168.2.34 (Windows 2003) Domain : old.com Forwarder : 192.168.2.1 (Gateway running DNS) DD-WRT VPN 2 OpenVPN using Routing -- I'm going to switch to bridging IP : 192.168.10.0/24 DNS : 192.168.10.10 (Windows 2008) Domain : xyz.dc Forwarder : 192.168.10.1 (Gateway running DNS) ClearOS When I'm connected I would like to resolve host names on both networks without fully qualifying them.

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  • How to pass alias through sudo

    - by Tanktalus
    I have an alias that passes in some parameters to a tool that I use often. Sometimes I run as myself, sometimes under sudo. Unfortunately, of course, sudo doesn't recognise the alias. Does anyone have a hint on how to pass the alias through? In this case, I have a bunch of options for perl when I'm debugging: alias pd='perl -Ilib -I/home/myuser/lib -d' Sometimes, I have to debug my tools as root, so, instead of running: pd ./mytool --some params I need to run it under sudo. I've tried many ways: sudo eval $(alias pd)\; pd ./mytool --some params sudo $(alias pd)\; pd ./mytool --some params sudo bash -c "$(alias pd)\; pd ./mytool --some params" sudo bash -c "$(alias pd); pd ./mytool --some params" sudo bash -c eval\ "$(alias pd)\; pd ./mytool --some params" sudo bash -c eval\ "'$(alias pd)\; pd ./mytool --some params'" I was hoping for a nice, concise way to ensure that my current pd alias was fully used (in case I need to tweak it later), though some of my attempts weren't concise at all. My last resort is to put it into a shell script and put that somewhere that sudo will be able to find. But aliases are soooo handy sometimes, so it is a last resort.

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  • Shorewall: temporarily drop incoming traffic except port 22?

    - by Magnetic_dud
    When I work on configuration files, especially of the mail server, I would like to temporarily drop all the incoming traffic except the port 22. So, I don't risk to lose incoming mails if I need to move the mail server to another server, or something like that. Using shorewall, how I could do that? I was thinking to create a rules file to divert all the traffic to a non-existant internal ip and switch it with the normal file when needed.

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  • iPhone surfing via USB... without wifi or data plan?

    - by Philipp Lenssen
    I bought an iPhone in China, where it is manufactured without Wifi. (I would have to switch carriers to sign up for a data plan as my current Chinese carrier doesn't support surfing either... if possible I want to avoid getting yet another card though.) Can I somehow surf with the iPhone Safari while USB-connected to my net-enabled laptop? Thanks!

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  • Best way to provide redundant switching/links to server

    - by Myles Gray
    We have 3x ESX hosts and 2x SANS that we wish to move to a redundant 10G networking infrastructure. We have 4x Dell PowerConnect 8024F's to provide our backbone and are configured as so (only core switches relevant to this question): So the questions are: 1) Do the interconnects between the 4x 8024F's need to be LAG'd or just STP'd 2) As the NICs on the servers are split across 2 switches, does any special configuration need to be done here or on the switches? 3) If a link or switch fails will the switches automatically find a new path to the Server/SAN?

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  • Change the output format of zsh's time

    - by YGA
    Hi Folks, I've just switched to zsh. However, I really don't like how the time builtin command also outputs the command that it's timing. I much prefer the bash style output. Anyone know how to switch it over? Zsh: [casqa1:~/temp]$ time grep foo /dev/null /usr/local/gnu/bin/grep --color -i foo /dev/null 0.00s user 0.00s system 53% cpu 0.004 total Bash: [casqa1:~/temp]$ bash casqa1.nyc:~/temp> time grep foo /dev/null real 0.0 user 0.0 sys 0.0 Thanks, /YGA

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  • recursive grep started at / hangs

    - by Martin
    I have used following grep search pattern on multiple platforms: grep -r -I -D skip 'string_to_match' / For example on FreeBSD 8.0, FreeBSD 6.4 and Debian 6.0(squeeze). Command does a recursive search starting from root directory, assumes that binary files do not have the 'string_to_match' and skips devices, sockets and named pipes. FreeBSD 8.0 and FreeBSD 6.4 use GNU grep version 2.5.1 and Debian 6.0 uses GNU grep version 2.6.3. On FreeBSD 6.4, last information printed to stderr was "grep: /dev/cuad0: Device busy". After this grep just idles as according to "top -m io -o total" the I/O usage of grep is nonexistent. Same behavior is true under FreeBSD 8.0, but last information sent to stderr is "grep: /tmp/.wine-0: Permission denied" on my installation. In case of Debian, last output to stderr is "grep: /proc/sysrq-trigger: Input/output error". If I check the I/O usage of grep process under Debian, it is following: root@Debian:~# iotop -bp 22439 Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 22439 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % grep -r -I -D skip 10.10.10.99 / Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 22439 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % grep -r -I -D skip 10.10.10.99 / Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 22439 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % grep -r -I -D skip 10.10.10.99 / ^Croot@Debian:~# What might cause this? Is there a way to view which file grep is currently processing in case lsof is not present? I'm able to use lsof under Debian and looks like the problematic file name there is "0xc6b2c230 file struct, ty=0, op=0xc0d34120". I'm not sure what this is.. I'm not able to use lsof or fstat under FreeBSD. PS: I know I could use find utility, but this is not the question.

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  • Build suggestion for mini itx server [on hold]

    - by Spyros
    I am looking to create a home server and since there does not seem to be a nice ready made one to purchase, i thought of building a mini itx one. I am not familiar with the best hardware/case to pick and therefore i thought i would ask for your experience. I will most probably install a simple linux distro, probably Debian and most probably without a desktop environment as well. Therefore, I am not looking for the best graphics card, though a decent one is preferred for sure. I would say that the most important thing is that the case/hardware play well with each other and the machine has decent specs ( i think something like 8gb RAM and 1TB hdd is most probably my most important things). I understand that this question can be closed as subjective, but it would be a great help for me if some of you guys who have been doing a similar build, can suggest something. I tried to find a stack exchange variant for the question, but it seems that this one more closely relates to the subject. But I will definitely understand it if people close it due to being subjective in nature. If you can maybe move it somewhere or so, please feel free to do so. Thank you for your time :)

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  • Can't port forward ssh on Asus RT-NU56 wireless router

    - by Matt
    I cannot ssh in (using putty) when I use 10.0.1.31 as the address. database server - wired switch part of Asus wireless router - office LAN So basically, we want to ssh in to the database server from our computer on the wired office LAN. Asus router has an ip of 10.0.1.31 and database server has a static IP of 192.168.0.20 I set up port forwarding like this: ssh 22 192.168.0.20 22 BOTH Firewall is turned completely off. Any other settings I'm missing?

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  • How can I find out if a port is opened or not?

    - by Roman
    I have installed Apache server on my Windows 7 computer. I was able to display the default index.php by typing http://localhost/ in the address line of my browser. However, I am still unable to see this page by typing IP address of my computer (neither locally (from the same computer) no globally (from another computer connected to the Internet)). I was told that I need to open port 80. I did it (in a way described here) but it did not solve the problem. First of all I would like to check which ports are opened and which are not. For example I am not sure that my port 80 was closed before I tried to open. I am also not sure that it is opened after I tried to open it. I tried to run a very simple web server written in Python. For that I used port 81 and it worked! And I did not try to open the port 81. So, it was opened by default. So, if 81 is opened by default, why 80 is not? Or it is? ADDITIONAL INFORMATION: 1. In my httpd.conf file I have "Listen 80". 2. This site tells me that port 80 on my computer is opened. 3. I get different responses if I try http://myip:80 and http://myip:81. In the last case browser (Chrome) writes me that link is broken. In the first case I get: Forbidden You don't have permission to access / on this server. 4. IE writes that "The website declined to show this webpage".

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  • How to shrink the Remote Desktop Connection Bar in Windows?

    - by Some Noob Student
    Ever since FireFox 4, page tabs have been moved to the top of the window. This gets pretty irritating when surfing the net through a remote desktop session. Often when I want to switch tabs, if I accidentally move my mouse a little to much to the top, I get the remote desktop connection bar blocking the tabs instead, then I'd have to wait a few frustrating seconds before it disappears again. So, are there any methods to shrink or shorten the remote desktop connection bar or delay the appearance of it?

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  • Domain changes required for SSL integration

    - by user131003
    Currently my site supports regular payment options (User is taken to Payment Gateway/PG website). Now I'm trying to implement "seamless" PG integration. I need SSL for this. I'm having a dedicated server with 5 static IPs from Hostgator/HG. options: I take SSL for www.my_domain.com. According to HG, I need to change IP of main site as current IP is not really dedicated as it is being shared by cpanel etc. So They need to bind another dedicated IP to main domain for SSL to work. This would required DNS change for main website and hence cause few hours downtime (which is ok). I've noticed that most of the e-commerce websites are using subdomains like secure.my_domain.com for ssl/https. This sounds like a better approach. But I've got few doubts in this case: a) Would I need to re-register with existing PGs (Paypal, Google Checkout, Authorize.net) if I switch to subdomain? Re-registering is not an option for me. b) Would DNS change be required for www.my_domain.com in this case. This confusion arose because of following reply from HG : "If the sub domain secure.my_domain.com is added to an existing cPanel it will use the IP for that cPanel so as long as it is a Dedicated IP that will be fine. If secure.my_domain.com gets setup as its own cPanel it will need to be assigned to a Dedicated IP which would have a DNS change involved.". PLease suggest.

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  • Can I use a Windows Server 2003 Domain Controller but my home router for DNS?

    - by NetworkingWannabie
    Hi All Probably easiest to start with a description of my current setup, which works (oh, and this is a home setup not an office or anything): I have an ADSL modem with a static IP address (192.168.128.1), and its DHCP capability is disabled. I have a permanently powered up Windows Server 2003 machine with a fixed IP (192.168.128.2) which provides my domain controller, dhcp, and dns. The default gateway for everything is my ADSL modem everything is setup to use the WS2003 machine as the primary DNS with the ADSL modem as Secondary DNS just in case the server goes down (everything includes the server itself). Lastly, just in case it's relevant, I have my DHCP leases set to infinite (or whatever the right term is). Everything is pretty hunky dory. Except, that is, for the fact that my server is ALWAYS on, and it isn't always used, so I'm burning juice that I don't need to - my server burns around 120W which isn't immense but isn't irrelevant either, so I'd like to put it into a stand-by state when it isn't being used (the more standby the better) and then get the clients to wake it up. Am I correct in assuming that this won't work at the moment - A given client would need an IP address to wake the machine up, and it needs to machine to be awake to get an IP - catch 22? Assuming I'm correct, can I move to using my router (which is always on) for DHCP? What impact will this have on DC and DNS? Alternatively, does anyone have a better way for me to achieve this? Can I get the server to wake up when it sees clients look for a DHCP server, etc? Wow, that came out longer than expected! Thanks for your help.

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  • Making one of the folders default in Apache

    - by OmerO
    Hello, The file & directory structure of my website is as follows: /Library/WebServer/mysite/joomla .. /Library/WebServer/mysite/wiki .. /Library/WebServer/mysite/forum .. /Library/WebServer/mysite/index.php As you see, there are various applications each residing in separate folders. Now, in order to define this structure, I have made this entry in Apache http-vhosts.config file: ServerName mysite.com DocumentRoot "/Library/WebServer/mysite" ** And I already have the DirectoryIndex defined: DirectoryIndex index.html index.php, and so on. So far so good but I want this specific functionality: When someone visits mysite, he/she should automatically directed to: /Library/WebServer/mysite/joomla (and therefore /Library/WebServer/mysite/joomla/index.php) I don't want to achieve that functionality by putting a redirection code inside /Library/WebServer/mysite/index.php or /Library/WebServer/mysite/index.htm because that causes time delays (because of the redirection, of course) But in this case, the only proper way of achieving it seems to set DocumentRoot this way: DocumentRoot "/Library/WebServer/mysite/joomla" But when I set it that way, then the other folders (/wiki, /forum, etc.) are simply not served by Apache. To work around it, I put directives like: Alias /wiki /Library/WebServer/mysite/wiki .. Alias /forum /library/WebServer/mysite/forum and it did work actually the way I wanted. But... I still cannot use it that way because in this case I just couldn't manage to make the wiki use Short URLs (as described in link text) So, I have to set the DocumentRoot back to /Library/WebServer/mysite and shoud be able to assign /Library/WebServer/mysite/joomla as the "default directory" (my own terminology :) Can I do it in Apache? Is there any other way you might suggest? Thanks.

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