Difference between revisions of "Centos"
Jump to navigation
Jump to search
m |
|||
Line 34: | Line 34: | ||
==Changing hard & soft file limits== | ==Changing hard & soft file limits== | ||
* Edit /etc/security/limits.conf | * Edit /etc/security/limits.conf | ||
+ | ==Ethernet Interface Details== | ||
+ | <pre>[root@host ~]# ethtool eth0 | ||
+ | Settings for eth0: | ||
+ | Supported ports: [ TP ] | ||
+ | Supported link modes: 10baseT/Half 10baseT/Full | ||
+ | 100baseT/Half 100baseT/Full | ||
+ | 1000baseT/Full | ||
+ | Supports auto-negotiation: Yes | ||
+ | Advertised link modes: 10baseT/Half 10baseT/Full | ||
+ | 100baseT/Half 100baseT/Full | ||
+ | 1000baseT/Full | ||
+ | Advertised auto-negotiation: Yes | ||
+ | Speed: 1000Mb/s | ||
+ | Duplex: Full | ||
+ | Port: Twisted Pair | ||
+ | PHYAD: 1 | ||
+ | Transceiver: internal | ||
+ | Auto-negotiation: on | ||
+ | Supports Wake-on: g | ||
+ | Wake-on: d | ||
+ | Link detected: yes | ||
+ | </pre> |
Revision as of 08:51, 2 February 2011
bugs
NFS mount permission denied
Error:
[root@traderdirect ~]# mount 10.93.138.18:/nfs-shares /mounts/tdstorage/ mount: 10.93.138.18:/nfs-shares failed, reason given by server: Permission denied
Solution: /bin/mount -t nfsd nfsd /proc/fs/nfsd See: this bug report
General
Add Swap
TO add a 4 gig swap:
- dd if=/dev/zero of=/swapfile bs=1M count=4096
- mkswap /swapfile
- swapon /swapfile
Then add the following to /etc/fstab:
- /swapfile swap swap defaults 0 0
Kernel Parameters for Oralce
- Put in /etc/sysctl.conf
kernel.sem = 250 32000 100 128 net.ipv4.ip_local_port_range = 9000 - 65500 net.core.rmem_default = 262144 net.core.rmem_max = 4194304 net.core.wmem_default = 262144 net.core.wmem_max = 1048576 fs.aio-max-nr = 1048576 fs.file-max = 6815744
See more here
Changing hard & soft file limits
- Edit /etc/security/limits.conf
Ethernet Interface Details
[root@host ~]# ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on Supports Wake-on: g Wake-on: d Link detected: yes