A little bit of wisdom
In the console enter: In my gnuplot (bash) scripts I have: export GDFONTPATH=”/usr/share/fonts/truetype/ttf-dejavu/” export GNUPLOT_FONTPATH=”/usr/share/fonts/truetype/ttf-dejavu/” Other methods: export GDFONTPATH=”/your/font/directory/fonts/” before you start gnuplot. The fonts should be in the folder “/fonts”. To make this persistent across reboots, and to set the paths for fonts in postscript terminal, add lines similar to the ones below to […]
To change the default editor at the system level: sudo update-alternatives –config editor and then follow the onscreen prompts. If your editor isn’t on the list, do this first: update-alternatives –install /usr/bin/editor editor /usr/bin/vim 10
EDIT 05/05/2020 – I realised this guide is a little confusing so hopefully this is easier to follow. How Do I Tell If A Hard Disk Has Failed? If a disk has failed, you will probably find a lot of error messages in the log files, e.g. /var/log/messages or /var/log/syslog and if you set up […]
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 […]
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