IpV6 disable on linux

$ sysctl -w net.ipv6.conf.eth0.disable_ipv6=1

Linux servislerin acilip/kapatilmasi

                             Komut satırından  görsel bir araç kullanarak calışma seviyelerinde çalışacak servisleri
          ayarlamak için ntsysv komutu kullanılabilir.
               
                 Komutun kullanımı :
      
                 [root@A init]# ntsysv









       

Linux Remote Desktop Protocol Client

          Linux makinadan windows makinaya uzak bağlantı istemi:

  Linux makinadan windows makinaya uzaktan bağlantı istemi örneği:
           
                           rdesktop komutu:
                Kurulum;
       [root@A]# yum install rdesktop
    
               Bağlantı istemi;
       [root@A]# rdesktop ip -k tr -u 'username' -g 90%

vsftpd server kurulumu konfigure edilmesi ve test baglantisi olusturma

vsftpd server kurulumu konfigure edilmesi ve test baglantisi olusturma
centos 6.5;

    server installation
[root@aysecik ~]#yum install vsftpd -y

[root@aysecik ~]# vi /etc/vsftpd/vsftpd.conf

yapilcaklar degisiklikler :

anonymous_enable=NO
connect_from_port_20=NO
chroot_list_enable=YES
chroot_list_file=/etc/vsftpd/chroot_list

kaydedip cikilir

[root@aysecik ~]#touch /etc/vsftpd/chroot_list

olusturulup kullanilar eklenebilir


[root@aysecik ~]#chkconfig --levels 235 vsftpd on

[root@aysecik ~]#service vsftpd start

server tarafinda yapilandirma bitirilir ve

[root@aysecik ~]#netstat -ann | grep 21 | grep -i listen

kontrolu yapilir

[root@aysecik ~]#useradd -m ftpuser1

[root@aysecik ~]# /etc/vsftpd/chroot_list

e user eklenir

[root@aysecik ~]# service vsftpd restart


           client tarafinda yapilandirmayida ayni makinada yapalim
[root@aysecik ~]# ifconfig
 wlan adresi ogrenilir

[root@aysecik ~]#yum install ftp
 kurulur


bağlanmak için:
[root@aysecik ~]# ftp 192.168.1.15

[root@aysecik ~]# ftp 192.168.1.15
Connected to 192.168.1.15 (192.168.1.15).220 (vsFTPd 2.2.2)Name (192.168.1.15:root): ftpuser1331 Please specify the password.Password:230 Login successful.Remote system type is UNIX.Using binary mode to transfer files.ftp> pwd257 "/"ftp> ls227 Entering Passive Mode (192,168,1,15,169,103).150 Here comes the directory listing.226 Directory send

OK.ftp> mkdir aoyas257 "/aoyas" createdftp> cd aoyas250 Directory successfully changed.ftp

> put /etc/resolv.conf local: /etc/resolv.conf remote: /etc/resolv.conf227 Entering Passive Mode (192,168,1,15,45,59).

Selinux kapatmak

selinux u kapatmak icin :

       getenforce kontrolü:
  [root@aysecik ~]# getenforce
   Enforcing

        Kapatmak için:
  [root@aysecik ~]# setenforce 0

 
    [root@aysecik ~]# getenforce
Permissive

 tekrar edip permissive çıktısını aldığımız için kapanmış tamam diyoruz
      kalıcı şekilde kapatmak için:

   /etc/selinux/config dosyasında düzenleme yapılmalı

linux sistemlerin genel loglari ve sisteme ait bilgiler

    linux sistemlerin genel loglari ve sisteme ait bilgiler

   var/log/messages
altinda  tutulur
   
    # tail -1000 /var/log/messages
Jan  4 09:57:34 localhost kernel: pci 0000:00:18.7: PCI bridge to [bus 22]
Jan  4 09:57:34 localhost kernel: pci0000:00: Requesting ACPI _OSC control (0x1d)
Jan  4 09:57:34 localhost kernel: pci0000:00: ACPI _OSC control (0x15) granted
Jan  4 09:57:34 localhost kernel: ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 *9 10 11 14 15)
Jan  4 09:57:34 localhost kernel: ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 6 7 9 10 11 14 15)
Jan  4 09:57:34 localhost kernel: ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 9 10 *11 14 15)
Jan  4 09:57:34 localhost kernel: ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 9 *10 11 14 15)
Jan  4 09:57:34 localhost kernel: vgaarb: device added: PCI:0000:00:0f.0,decodes=io+mem,owns=io+mem,locks=none
Jan  4 09:57:34 localhost kernel: vgaarb: loaded
Jan  4 09:57:34 localhost kernel: vgaarb: bridge control possible 0000:00:0f.0
Jan  4 09:57:34 localhost kernel: SCSI subsystem initialized
Jan  4 09:57:34 localhost kernel: ACPI: bus type scsi registered


       

Linux storage komutlari

Linux disk durumunu goruntuleme
               
                disk free komutu
                # df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda1        77G  5.4G   68G   8% /
    tmpfs           3.9G     0  3.9G   0% /dev/shm
    /dev/sda3       374G  6.6G  349G   2% /opt/inseptra
               
                disk usage
                komutu dosyanin yada dizinin diskteki kapladigi boyutu sorgular
                # du -sh test.sh
4.0K    test.sh
               
                ulasilabilir aygitlari gorutuleme
                # fdisk -l

Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000e7669

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64        7833    62401536   8e  Linux LVM

Disk /dev/mapper/vg_imc-lv_root: 52.3 GB, 52344913920 bytes
255 heads, 63 sectors/track, 6363 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

               
                    acilista sisteme baglanmis dosyalar hakkinda bilgi verir
                    /etc/fstab
# Created by anaconda on Wed Feb 25 17:18:17 2015
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_imc-lv_root /                       ext4    defaults        1 1
UUID=d7d31050-7663-4ced-9409-27d7e0a68e66 /boot                   ext4    defaults        1 2
/dev/mapper/vg_imc-lv_home /home                   ext4    defaults        1 2
/dev/mapper/vg_imc-lv_swap swap                    swap    defaults        0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0



                    # mount
/dev/mapper/vg_imc-lv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vg_imc-lv_home on /home type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)