RSINFOMINDS: 2 Dec 2011

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RSInfoMinds, a web based IT Training and Consultancy firm. It is established with high dreams in training people in IT Infrastructure Field. We provide Online and Class Room training in various fields of IT Infrastructure Management.

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Redhat Linux Admin Redhat Linux Cluster

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Friday, 2 December 2011

"Server refused to allocate pty"

The symptoms may indicate that there is an application that is holding on to ptys and not releasing it. Try using the 'fuser' command to find the culprit application, like this:

# cd /dev/pts

# fuser *

The 'fuser' command will list all PIDs associated with each pty device.
If there is a process that is not releasing its ptys, you will see its PID occur many times in the fuser output.

Solution: Restart the application.

Various Commands for Hardware Inventory

The following commands provide system hardware configuration:

To provide a system inventory of processor memory,disks, network information:
```
prtconf
```

Processor-related commands:

To read ODM:
```
lsdev -Cc processor
```
To read running processor:
```
bindprocessor -q
```
or
```
lsattr -El proc0
```
To performance statistics on running processor:
```
sar -P ALL 1 5
```
To process running on what processor:
```
pstat -S
```

Memory-related commands:

To check status of memory:
```
lsdev -Cc memory
```
To check memory size:
In kilobytes:
```
bootinfo -r
```
In megabytes:
```
lsattr -El mem0
```
or
```
topas
```
In 4 kilobyte pages,
```
svmon -G
```

Disk-related commands:

To check status of disk and type of disk:
```
lsdev -Cc disk
```
To check characteristics of hdisk0 including size:
```
lsattr -El hdisk0
```
To check vital product data, including size:
```
lscfg -vp |more
```

Tape-related commands:

To check tape status and type:
```
lsdev -Cc tape
```
To check characteristics of tape drive:
```
lsattr -El rmt0
```
To check vital product data, including size:
```
lscfg -vp |more
```