Even if it has been disabled firewalld and iptables, some iptables rules could be activated after a reboot. It’s due to libvirtd .
I’ve just read a good post here where it’s fully explained why even though iptables is turned OFF, after every boot the command iptables -L -n still displays some rules to be activated.
I’ve just found a good tutorial to compile winexe.
My host was a CentOS 7 box and I followed the instruction of this link:
Execute Windows Commands from Linux using winexe. Connect from Linux to Windows without SSH
In order to have git working, I opened the outgoing connection of 9418 TCP port on my firewall.
I’m telling You about a Centos 5.10 server joined to an Active Directory environment.
Once I was able to open a ssh session on this server with my A.D. username/password, but some day ago I noticed it was possible only to log in this server using local root account.
I discovered that the wbinfo -i myusername command retuned a WBC_ERR_WINBIND_NOT_AVAILABLE error.
To fix this problem I issued the following commands:
# service winbind stop
# service smb stop
# net cache flush
# rm -f /var/lib/samba/*tdb
# service smb start
# service winbind start
Recently in a very old server I had to remove a disk. My server was composed by two physical volumes: a RAID5 volume, shown as /dev/sda to the operating system by the SCSI controller, and a single hard disk as /dev/sdb.
My /dev/sdb, since there is no way to have a new disk with the same geometry, I decided to remove it.
The bios utility of my SCSI controller is quite strange and I cannot remove my une-disk logical volume without remove all the configuration.
root@arch:~# pvdisplay
/dev/sdb: read failed after 0 of 4096 at 0: input/output Error
/dev/sdb: read failed after 0 of 4096 at 146695716864: input/output Error
/dev/sdb: read failed after 0 of 4096 at 146695774208: input/output Error
/dev/sdb: read failed after 0 of 4096 at 4096: input/output Error
— Physical volume —
PV Name /dev/sda1
VG Name vg_system
PV Size 838,12 GiB / not usable 2,00 MiB
Allocatable yes
PE Size 4,00 MiB
Total PE 214559
Free PE 21184
Allocated PE 193375
PV UUID ZQQwAs-yGgP-LZXk-3cTy-yaOb-gijr-bnUCz4
So I’d better to leave my controller untouched and tell my linux CentOS to forget the /dev/sdb disk.
root@arch:~# echo 1 > /sys/block/sdb/device/delete
Thanks to a Sebastian’s post here, I noticed the existence of x2go. I’ve just tested it and I liked it a lot. X2go is a very nice way to access my linux desktop.
In order to install x2go server-side, on a Centos 6.4 I only needed theese commands:
yum update
wget -O /etc/yum.repos.d/x2go.repo http://download.opensuse.org/repositories/X11:/RemoteDesktop:/x2go/RHEL_6/X11:RemoteDesktop:x2go.repo
yum update
yum install x2goserver
then
vi /etc/group
to add the guys to be allowed to connect to their desktop. E.g.
x2gouser:x:298:joe,jane,jack,jasmine
The x2go windows client can be downloaded from http://code.x2go.org/releases/binary-win32/x2goclient/releases/.
getting the error
ERROR: ORA-01034: ORACLE not available ORA-27121: unable to determine size of shared memory segment Linux Error: 13: Permission denied
on a CentOS 5 Oracle box, You can fix it with changing a file permission:
chmod 6751 $ORACLE_HOME/bin/oracle
Dreadful, is’t it? 😉