A little bit of wisdom
Rename files / folders with spaces: IFS=$’\n’;for f in `find .`; do file=$(echo $f | tr [:blank:] ‘_’); [ -e $f ] && [ ! -e $file ] && mv “$f” $file;done;unset IFS Rsync: rsync -r -a -v rsync://ns2/storage/www-srv /storage/ ^^^ from ns2 to new host – (run on new host) Rsync (local to remote) […]
Create the physical volume: pvcreate /dev/sdb Create the Volume Group: vgcreate vg_backuppc_storage /dev/sdb Create the logical volume: lvcreate -l +100%FREE vg_backuppc_storage Create a filesystem on the logical volume: mkfs.ext4 /dev/vg_backuppc_storage/lvol0 Resize the physical volume: (need to unmount the LV before doing this) pvresize /dev/sdb Extend the volume: lvextend -l +100%FREE -r /dev/vg_backuppc_storage/lvol0 Mount your new […]
To define a new service in Nagios you need to do the following: 1) Add the necessary commands to /etc/nagios/objects/commands.cfg 2) Define the host and service in /etc/nagios/objects/templates.cfg 3) Define a host definition in /etc/nagios/objects/.cfg Command definition in commands.cfg define command{ command_name check-ssl-cert command_line $USER1$/check_ssl_certificate -H $ARG1$ -p $ARG2$ -c $ARG3$ -w $ARG4$ } The […]
Adding routes in Linux Setting a route in Linux or Unix is just a matter of utilizing the route command. To make routing modifications you have to be running as root or use sudo for super user privileges. This article will show you how to use "route add" and "route del" to add and remove […]
Linux software RAID – quick howto. Basic steps: 1) create partitions using cfdisk or fdisk (set them to MSDOS type with parted beforehand if required) 2) Change partition type to Linux Raid autodetect 3) Create RAID 4) Format RAID devices Show partitions with ‘fdisk -l’ Device Boot Start […]
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The RedHat / CentOS way. Title should be “recover grub boot loader really”! Boot into recovery mode from the linux rescue cd. Type: chroot /mnt/sysimage – this will make your main / partition (currently mounted under /mnt/sysimage) the / partition. Type mount and find which device is your hard disk. This could be sda or […]
This command will copy files between servers – ownership of the files changes to the user you used to login to the remote server with. This can be any user with SSH access. tar -czf – directory/ | ssh user@remotehost “tar -xzf -“
I was trying to mount a CIFS / SAMBA share on Debian GNU/Linux 7 (wheezy). I wasn’t being prompted for a password, I would simply get: mount -t cifs -o user=admin //10.1.1.10/BLAH remote/ mount: block device //10.1.1.10/BLAH is write-protected, mounting read-only mount: cannot mount block device //10.1.1.10/BLAH read-only I needed to install “cifs-utils” apt-get install […]
*UPDATED Now replaced with a simple one line command: openssl req -newkey rsa:1024 -keyout my.servername.key -nodes -x509 -days 999 -out my.servername.crt The above command will generate a self signed certificate and key (used for signing the certificate) OLD Method: Generating SSL keys for use with Apache. Two files are required to generate your own secure […]
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