8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
My question is basically as the title says. How can I check a user inputted string is only certain characters long (for example, 3 characters long) and how do I check a user inputted string only contains certain characters (for example, it should only contain the characters 'u', 'a', 'g', and 'c')... (4 Replies)
Discussion started by: Eric1
2. Shell Programming and Scripting
This was taken down recently because it appeared to be homework, but it isn't. It's for a script I am working on at work. Thanks for the help.
How do you check that user inputs (arguments 1 and 2) are both numbers and are at least 5 digits in length? (2 Replies)
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3. UNIX for Dummies Questions & Answers
When I use who it shows who is online and from what time they logged in but is there a way I can see the last time someone was logged on if they aren't online? Is it with the who command?
thx (11 Replies)
Discussion started by: subway69
I'm a little rusty with HACMP, but wanted to find out if it is possible to remove a disk heartbeat network from a running HACMP cluster.
Reason is, I need to migrate all the SAN disk, so the current heartbeat disk will be disappearing. Ideally, I'd like to avoid taking the cluster down to... (2 Replies)
Discussion started by: cmcbugg
5. UNIX for Advanced & Expert Users
in a multi user system of 3 users X,Y,Z, if i know that X is presently online, is it possible to determine for how long has he been online? i mean the time duration (3 Replies)
Discussion started by: arindamlive
I'm writing a KSH shell script that's using SQL though DB2.
If I have a table defined and populated
db2 "create table tb(num int,letter char(4))"
db2 "insert into tb values(111,a)
db2 "insert into tb values(112,b)
db2 "insert into tb values(111,c)
How can I check if a letter user... (0 Replies)
Discussion started by: busdude
This is the source code:
using namespace std;
struct passwd *user;
char login="alex", password="qwertyuiop";
if ((user= getpwnam(login)) == NULL)
cout << "No such user\n";
else if... (24 Replies)
Discussion started by: hakermania
8. Shell Programming and Scripting
I decided to delete the first post since it was againt the forum rules (4 Replies)
Discussion started by: Necrologist
DHISD(8) BSD System Manager's Manual DHISD(8)
dhisd -- Dynamic Host Information System server.
dhisd [-D] [-p port] [-d database] [-s services] [-l logfile] [-P pidfile]
DHIS is a client-server architecture meant to update databases for systems which are assigned a dynamic IP[v4] address.
By the means of a DHIS client a host which is assigned a dynamic IP address (either from its ISP or from DHCP) is able to communicate with a
DHIS server in order to advertise its newly acquired IP address.
DHIS comprises a UDP based protocol to achieve this purpose.
A DHIS client has a unique identification number and a set of authentication keys, runs in background, and attempts to reach its server.
The DHIS server (permanently online) listens to UDP messages from its clients and authenticates these against its knowledge of keys. When
authentication is successful the DHIS server updates one or more databases with the newly received IP address for the given client.
The server then keeps sending, every period of time, check requests to each of its connected clients. These need to be acknowledged. If not
the server will consider, on an individual basis, that the client has disconnected and will again update the databases to an offline state.
Alternativelly the server may receive an OFFLINE_REQ packet from the client, in which case the DNS record is updated at once and the online
-D Increase debug level.
Specify port to listen on. If not specified, the default is port 58800.
Use an alternative database file instead of /etc/dhis-server/dhis.db.
Use an alternative database file instead of /etc/dhis-server/services.db.
Use an alternative log file instead of /var/log/dhisd.log.
Use an alternative PID file instead of /var/run/dhisd.pid.
DHIS client database. Contains the credentials of clients.
DHIS service database. Contains a list of services and the location of the corresponding DHIS engine plugins.
dhisd has been written by Joao Cabral <firstname.lastname@example.org>.
This manual page was written by Guus Sliepen <email@example.com> for the Debian GNU/Linux system.
Debian GNU/Linux June 1, 2019 Debian GNU/Linux