Делаем PEM сертификат из CRT и KEY
July 27, 2019 - Reading time: ~1 minute
Делаем PEM сертификат из CRT и KEY
Дано: rsa.key,ssl.crt
Необходимо:ssl.pem
Действия:
Выпиливаем пароль из сертификата
openssl rsa -in rsa.key -out ssl.key
Делаем pem сертификат (с приват кеем)
cat ssl.key ssl.crt > ssl.pem

Создаем csr запрос для получения сертификата
July 27, 2019 - Reading time: ~1 minute

openssl genrsa -des3 -out server.key 2048

openssl req -new -key server.key -out server.csr

Если сертификат будет самоподписанным, то подписывать так

openssl x509 -req -days 730 -in server.csr -signkey server.key -out server.crt

Make an ISO from files on your hard drive
July 27, 2019 - Reading time: ~1 minute

type “mkisofs -o /tmp/cd.iso /tmp/directory/”

Sort command to sort IP address
July 27, 2019 - Reading time: ~1 minute

Here is our sample input file:

192.168.1.100
192.168.1.19
192.168.1.102
192.168.2.1
192.168.0.2

Type the following sort command:
$ sort -t . -k 3,3n -k 4,4n /path/to/file
Sample output:

192.168.0.2
192.168.1.19
192.168.1.100
192.168.1.102
192.168.2.1

Where:

  • -t . : Set field to . (dot) as our IPs separated by dot symbol
  • -n : Makes the program sort according to numerical value
  • -k opts: Sort data / fields using the given column number. For example, the option -k 2 made the program sort using the second column of data. The option -k 3,3n -k 4,4n sorts each column. First it will sort 3rd column and then 4th column.

Setting Up An NFS Server And Client On CentOS 6.3
July 27, 2019 - Reading time: ~1 minute
  • NFS Server: server.example.com, IP address: 192.168.0.100
  • NFS Client: client.example.com, IP address: 192.168.0.101

yum install nfs-utils nfs-utils-lib
chkconfig –levels 235 nfs on
/etc/init.d/nfs start

On Server:

mkdir /var/nfs
chown 65534:65534 /var/nfs
chmod 755 /var/nfs
* 65534 – group- nfsnobody

vi /etc/exports
{

/home 192.168.0.101(rw,sync,no_root_squash,no_subtree_check) /var/nfs 192.168.0.101(rw,sync,no_subtree_check)

}

exportfs -a

On Client:

mkdir -p /mnt/nfs/home
mkdir -p /mnt/nfs/var/nfs

mount 192.168.0.100:/home /mnt/nfs/home
mount 192.168.0.100:/var/nfs /mnt/nfs/var/nfs

vi /etc/fstab
{

192.168.0.100:/home /mnt/nfs/home nfs rw,sync,hard,intr 0 0 192.168.0.100:/var/nfs /mnt/nfs/var/nfs nfs

}

GPG create
July 27, 2019 - Reading time: ~1 minute

gpg –gen-key

EXPORT KEYS

export public key: gpg –export –armor [email protected] > jqdoe-pubkey.asc
export private key: gpg –export-secret-keys –armor [email protected] > jqdoe-privkey.asc export to keyserver: gpg –keyserver hkp://subkeys.pgp.net –send-key KEYNAME

IMPORT KEYS

public: gpg –import jqdoe-pubkey.asc
private: gpg –allow-secret-key-import –import jqdoe-privkey.asc

TRUST KEY
gpg –edit-key KEYNAME
trust – quit

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