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| Discuss what's fucking going on, and which programs are best and worst. One-time "program" announcements from "established" webmasters are allowed. |
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12-22-2002, 04:11 PM
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#1 |
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So Fucking Banned
Join Date: Jan 2001
Location: http://www.thefly.net/ --- Quit your job and live off steady traffic.
Posts: 11,856
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Newbie Unix Question...
What does the "s" mean here...? Do I change this with chmod?
This is a directory... drwxr-sr-x 2 thefly thefly |
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12-22-2002, 04:14 PM
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#2 |
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rockin tha trailerpark
Industry Role:
Join Date: May 2001
Location: ~Coastal~
Posts: 23,088
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format s:
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12-22-2002, 04:15 PM
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#3 |
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So Fucking Banned
Join Date: Jan 2001
Location: http://www.thefly.net/ --- Quit your job and live off steady traffic.
Posts: 11,856
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byte me
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12-22-2002, 04:17 PM
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#4 |
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rockin tha trailerpark
Industry Role:
Join Date: May 2001
Location: ~Coastal~
Posts: 23,088
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chmod -y -o -u -r
mkdir -m -o -m |
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12-22-2002, 04:19 PM
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#5 |
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Registered User
Industry Role:
Join Date: May 2001
Location: Са́нкт-Петербу́рг
Posts: 10,945
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rm -rf thefly
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12-22-2002, 04:21 PM
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#6 |
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Confirmed User
Join Date: Feb 2002
Location: Amsterdam
Posts: 9,377
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It's called suid bit or sgid bit by default, unix installations have many programs installed suid root. Suid root refers to set user id root. This allows the program to do functions not normally allowed for users to do themselves. Low level networking routines, controlling graphical display functions, changing passwords, and logging in are all examples of programs that rely on executing their functions as a user that is not restricted by standard file permissions. While many programs need this functionality, the program must be bug free in only allowing the user to do the function the program was designed for.
DynaMite 
__________________
| http://www.sinnerscash.com/ | ICQ: 370820 | Skype: SinnersCash | AdultWhosWho | |
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12-22-2002, 04:23 PM
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#7 |
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Confirmed User
Join Date: Nov 2001
Location: MTL
Posts: 5,060
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on a directory it means 'sgid or set the group owner on created files to
the group that owns the directory rather than the group of the user creating the file, it's handy for controlling the ownership of uploaded files....(s in that position implies x btw, since there wouldn't be much point in doing this if you didn't have exec permission to start with) --------------- Not sure of what it means but that's what I found 
__________________
mmm my sig was too big... no more cool animation  but hey still! need php? ICQ: 94586959 |
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12-22-2002, 04:23 PM
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#8 |
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Registered User
Industry Role:
Join Date: May 2001
Location: Са́нкт-Петербу́рг
Posts: 10,945
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its a sticky bit, dont touch it.
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12-22-2002, 04:24 PM
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#9 | |
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So Fucking Banned
Join Date: Jan 2001
Location: http://www.thefly.net/ --- Quit your job and live off steady traffic.
Posts: 11,856
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Quote:
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12-22-2002, 04:25 PM
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#10 | |
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Confirmed User
Industry Role:
Join Date: Oct 2002
Location: lalaland
Posts: 2,120
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Quote:
+s is suid ... for example, if an executable file is +s and owned by root it will get executed with root permissions. For example /bin/passwd needs to be suid root since it writes to /etc/passwd. Only root can normaly do that .. but to give normal users the abillity to change their passwords, unix solves it by having it +s (and owned by root) Suid files are the ones hackers use to get root localy once they're in your system with shellaccess. Every suidfile is a potential securityhole so if you dont need the functionallity it provides I suggest You remove as many suid-files as you can... Find them with: Code:
find / -type f \( -perm -4000 -o -perm -2000 \) -exec ls -ld '{}' \;
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12-22-2002, 04:26 PM
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#11 |
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Confirmed User
Join Date: Nov 2001
Location: MTL
Posts: 5,060
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From what I understand, s implies x so try not giving the execute right and see what you get.. (i'm just guessing )
__________________
mmm my sig was too big... no more cool animation but hey still! need php? ICQ: 94586959 |
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12-22-2002, 04:26 PM
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#12 |
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So Fucking Banned
Join Date: Jan 2001
Location: http://www.thefly.net/ --- Quit your job and live off steady traffic.
Posts: 11,856
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Hmm duh I just did chmod +s
Let's see... I get drwsr-sr-x instead of drwxr-sr-x well I guess I can play some more... |
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12-22-2002, 04:28 PM
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#13 |
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Confirmed User
Industry Role:
Join Date: Oct 2002
Location: lalaland
Posts: 2,120
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uhm, a couple of good answers while I typed mine ;) ...
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