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The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.

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Hi,

I have a folder called

home/system/xyz

now xyz has many sub directories  like abc , def
now abc has directories like lms, pqr etc

xyz is currently owned by me. problem is others cannot see xyz and its all subdirectories for possible issues on the server settings.
now i want to give ownership to xyz directory to ADMIN user say  crm and password say p@ssword so that all the team mates who has ADMIN crm  access can view and modify any directories and files within xyz no matter how deep they are.
how to give access to this one?
0
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I am debating as to should I use nginx or squid as a proxy for my centOS or if there is a other compatible proxy server.
0
I had this question after viewing Solaris LDAP Client failure.

Team - I am experiencing the same issue - But I dont know how to allow anonymous access to directory server as per the solution from user jw124210.

Please HELP!!!!
0
Hi I have a server that has Centos7 that does not have an GUI Interface installed. By accident for some reason it looks as though during the install I did not set the IP Address details of Nic1and these should be static. I am trying to set it so that the IP address details of Nic 1 is 10.10.230.12. subnet mask is 255.255.255.0, gw is 10.10.230.6 and the dns I was going to just set as 8.8.8.8 (Google DNS Servers)
Can you help on the commands to run to set this please. The server has 2 nics but only nic1 is plugged in.  if I run the command ip a this is what I get (please see attached file). I assume the nic is that called enp2s0f0
Centos7.jpg
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i installed bind and setup example.com domain on my centos 6.9.

trying to find what is the causes here.

[root@dns01 ~]# named-checkconf /etc/named.conf
[root@dns01 ~]#

[root@dns01 ~]# named-checkzone example.com /var/named/rev.example.com
zone example.com/IN: loaded serial 2017091501
OK

[root@dns01 ~]# named-checkzone example.com /var/named/fwd.example.com
zone example.com/IN: loaded serial 2017091501
OK


[root@dns01 ~]# host -v -t ns example.com. 192.168.2.91
Trying "example.com"
;; connection timed out; trying next origin
Trying "example.com"
;; connection timed out; no servers could be reached
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Can i able to add RHEL6 and RHEL7 repos to spacewalk?

I have account on redhat where i can download all the rhel6/7 packages.  not sure how to add to spacewalk so i can utilize spacewalk to do lot of operations.
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I am installing spacewalk on RHEL7.

I was following this article.

https://github.com/spacewalkproject/spacewalk/wiki/HowToInstall

I am getting the following error when i execute,
yum -y install spacewalk-postgresql


Error: Package: jboss-jstl-1.2-api-1.0.3-15.1.el7.noarch (epel)
           Requires: mvn(org.jboss.spec.javax.servlet:jboss-servlet-api_3.0_spec)
Error: Package: jboss-jstl-1.2-api-1.0.3-15.1.el7.noarch (epel)
           Requires: mvn(org.jboss.spec.javax.el:jboss-el-api_2.2_spec)
Error: Package: jpam-0.4-28.el7.x86_64 (spacewalk)
           Requires: apache-commons-beanutils
Error: Package: jboss-jsp-2.2-api-1.0.1-15.1.el7.noarch (epel)
           Requires: mvn(org.jboss.spec.javax.servlet:jboss-servlet-api_3.0_spec)
Error: Package: spacewalk-jpp-workaround-2.3.5-1.el7.noarch (spacewalk)
           Requires: apache-commons-validator
Error: Package: struts-1.3.10-14.1.el7.noarch (epel)
           Requires: mvn(commons-validator:commons-validator)
Error: Package: apache-commons-chain-1.2-12.1.el7.noarch (epel)
           Requires: mvn(commons-digester:commons-digester)
Error: Package: python-cheetah-2.4.4-4.el7.x86_64 (epel)
           Requires: python-pygments
Error: Package: spacewalk-jpp-workaround-2.3.5-1.el7.noarch (spacewalk)
           Requires: apache-commons-digester
Error: Package: jboss-jsp-2.2-api-1.0.1-15.1.el7.noarch (epel)
           Requires: mvn(org.jboss.spec.javax.el:jboss-el-api_2.2_spec)
Error: Package: …
0
Hi,
how to transfer
site booksmarks to shared bookmarks in winscp

please advise
0
Hi friends!
I am newbie about to vlan. I have a CentOS with an IP 192.168.1.10 on eth0. Our Network Administrator has added switches and devices with VLAN 10.

I need to keep my IP on eth0 (untagged) and allow these devices on VLAN 10 to talk to my server. If I create eth0.10 with the IP configuration... Can I use the same IP of eth0? WIll Linux allow the same IP on two interfaces?

Thanks
Denilson
0
Hello ,

I have a problem with interfaces on a multihomed topology. My interfaces can not ping each other and can not ping theirselves too
sysctl as given below.

But it is able to ping the interface ip when i directly write ping 37.123.98.142 , if the both interface are not able to ping this interface's ip how does it ping it or from where ?

I have to let them have access each other how shoud i do it ?

Note: loopback interface activated
Note2: em interfaces are all down

[root@spd network-scripts]# sysctl -p
net.ipv4.ip_forward = 1
net.ipv4.conf.p1p1.rp_filter = 2
net.ipv4.conf.p1p2.rp_filter = 2
net.ipv4.conf.all.rp_filter = 2
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.lo.rp_filter = 2
net.ipv4.conf.p1p1.accept_local = 1
net.ipv4.conf.p1p2.accept_local = 1
net.ipv4.conf.all.accept_local = 1
net.ipv4.conf.default.accept_local = 1
net.ipv4.conf.lo.accept_local = 1
net.ipv4.conf.default.arp_filter = 0
net.ipv4.conf.all.arp_filter = 0
net.ipv4.conf.p1p2.arp_filter = 0
net.ipv4.conf.p1p1.arp_filter = 0
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.p1p1.arp_announce = 2
net.ipv4.conf.p1p2.arp_announce = 2

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PING 37.123.98.142 (37.123.98.142) from 37.123.98.142 p1p1: 56(84) bytes of data.

^C
--- 37.123.98.142 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2055ms

[root@spd network-scripts]# ping -I p1p1 37.123.98.138
PING 37.123.98.138 (37.123.98.138) from 37.123.98.142 p1p1: 56(84) bytes of data.

^C
--- 37.123.98.138 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3064ms

[root@spd network-scripts]# ping -I p1p2 37.123.98.138
PING 37.123.98.138 (37.123.98.138) from 37.123.98.138 p1p2: 56(84) bytes of data.

^C
--- 37.123.98.138 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1038ms

[root@spd network-scripts]# ping -I p1p2 37.123.98.142
PING 37.123.98.142 (37.123.98.142) from 37.123.98.138 p1p2: 56(84) bytes of data.

^C
--- 37.123.98.142 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2060ms

Open in new window


[root@spd network-scripts]# ping 37.123.98.142
PING 37.123.98.142 (37.123.98.142) 56(84) bytes of data.
64 bytes from 37.123.98.142: icmp_seq=1 ttl=64 time=0.019 ms
64 bytes from 37.123.98.142: icmp_seq=2 ttl=64 time=0.022 ms
64 bytes from 37.123.98.142: icmp_seq=3 ttl=64 time=0.017 ms
64 bytes from 37.123.98.142: icmp_seq=4 ttl=64 time=0.015 ms

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0
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what is meaning of root.
why i have to go to root. what i can do from root what i cannot do from root. what i can do using my user.
how unix allows logging in as different user say John when i logged in as say xyz

any online link or free video tutorials explaining all these concepts? an how to practice please advise
0
Hello ,

We have suprised on one test. We realize that when an ip address directly sends 1million pps to a server. That server normally working with irq perfectly , it hits to only one core of the server.
Why that happens and how this issue should be over comed.
0
Hello ,


any body know what is the meaning of this numbers in iptables config file :

*raw
:PREROUTING ACCEPT [1318098:74794423]
:OUTPUT ACCEPT [2065:1143634]

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0
Hello ,

When we add this rules for forwarded traffic it is dropping all packets as they are invalid. There is no notrack rule on the server, why does it see the forwarded traffic as it is invalid ?


#-A FORWARD -p tcp -m conntrack --ctstate INVALID -j DROP
#-A FORWARD -p tcp ! --syn -m conntrack --ctstate NEW -j DROP

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0
Hello ,

We are facing with some kind of an attack as given below  also i have attached the pcap file ,

important thing is that  ;
  1. IP addresses spoofed with our country's ISP ip addresses
  2. TTL has been spoofed also and the TTL values are in the range of the ip address owners - you should find and edit the same ddos on github with name VSE
  3. Data is a copy of real packet used on this protocol for counter strike
  4. Destination port is also counter's port
  5. checksums are correctly generated

how should i block this kind of attack without blocking the real users ?



Protokol :17  Source IP :85.104.15.177  Source Port :58061  Destination IP :213.238.166.2  Destination Port :27015  TTL :108  Paket Boyutu :51  Checksum :9777  Data :FFFFFFFF71636F6E6E6563743078304135423333304500  
Protokol :17  Source IP :95.13.27.190  Source Port :55271  Destination IP :213.238.166.2  Destination Port :27015  TTL :111  Paket Boyutu :51  Checksum :64648  Data :FFFFFFFF71636F6E6E6563743078303044414236313000  
Protokol :17  Source IP :88.238.142.125  Source Port :55150  Destination IP :213.238.166.2  Destination Port :27015  TTL :105  Paket Boyutu :51  Checksum :37970  Data :FFFFFFFF71636F6E6E6563743078304138383935423800  
Protokol :17  Source IP :85.103.139.224  Source Port :52054  Destination IP :213.238.166.2  Destination Port :27015  TTL :108  Paket Boyutu :51  Checksum :49529  Data 

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Hello ,

Is there any possible way to drop bogus packets as seem below .

for this packets ; packet payload is smaller then the length of the packet

 Screen-Shot-2017-08-23-at-22.22.46.png
0
please replay answer ASAP
0
Have multiple VMworkstation VM's one of which I need to connect an Android device to. Need to setup  DNS with pfSense or mint to control .local request. Need to be able to hit my.test.local which is one of my servers on my network 10.8.x.x. Everything reading is telling me how to make them see www.xxx.com. Need to stay local and resolve this address.
0
Hi,

I have user called xyz under that folder there is folder call test under that there is folder called abc, def, hij etc

i want to search to search in all above folders and subfolders for a particular keyword say " nullpointerexception " how t do that .
please advise
0
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Hi,

winscp how to compare 2 different unix users say xyz and abc by opening xyz on left hands side and abc on right hand side. As of now on the left hands side i was able to open my windows laptop folder structure like C drive etc and on right hands side i am able to open one unix user like abc or xyz etc. please advise
0
hi

on the unix box various users like xyz, abc etc.

Looks like disk space is running out of server and i need to cleanup.

How to know how much user xyz occupying size and how much abc user is occupying size. please advise
0
In Windows there is a checkbox "Register this connection's addresses in DNS".  See attached screenshot.
What is the equivalent in
- Ubuntu Workstation
- Raspian (Raspberry Pi Debian variant)

Thank you
0
I want to search on below error
java.io.FileNotFoundException:

I want to search on all the weblogic domian directory files and its sub directory files and sub sub directory files?
how to search all the way to great great grad child level?

please advise
0
I have a vanguard calamp cellular modem with serivce from verizon and a static WAN address. Attached to it is a controller board running Busy Box v1.22.1.  I am having issues configuring port forwarding of the modem to connect to the busy box device over ssh so i can run diagnostics. does anyone have any experience with something like this?
0
OS : Linux

Let us suppose - we have 2 directories,
path1 : /prod/dir01/dir02       path2: /dev/dir01/dir01

If I refer  path1,  that should automatically should take it to path2.
Can it is possible to make it work in Linux ?

please advise.
0

Linux Networking

17K

Solutions

14K

Contributors

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.