- Control the anxiety, it’s ok to be nervous
- Use inclusive language. You are not presenting, you are in a conversation.
- Be present: walk around the building before, or sing a song. Get present and ready
- Dare to be dull
- Challenging question -> Listen – it’s an opportunity (yes, and…) – acknowledge the emotion
I have managed to create my first server in an openstack enviroment here at university of Bergen.
I can see my instance in the Dashboard:
Next thing was to add a volume:
Project -> Compute -> Volumes: Create Volume
After creating it, I had to go to “Manage Attachments”, and in Manage Volumen Attachments, I selected my “diverse” instance.
I had to use fdisk to format the new volume:
Hint: m for help, n for new partition, w for write table to disk.
Finally, format and mount:
mount /dev/vdb /data
[root@diverse lib]# df -kh
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 10G 8.1G 1.9G 81% /
devtmpfs 900M 0 900M 0% /dev
tmpfs 920M 0 920M 0% /dev/shm
tmpfs 920M 17M 904M 2% /run
tmpfs 920M 0 920M 0% /sys/fs/cgroup
tmpfs 184M 0 184M 0% /run/user/1000
/dev/vdb 50G 33M 50G 1% /data
I have to different Linux servers, and wanted to test if one where faster than the other. I used mysqlslap together with the “time” command in a bash shell.
# time mysqlslap –user=root –password=
cat /root/mysql –host=localhost concurrency=50 –iterations=100 –number-int-cols=5 –number-char-cols=20 –auto-generate-sql –verbose
In this way I could get out different values from the server which I could compare.
Average number of seconds to run all queries: 0.007 seconds
Minimum number of seconds to run all queries: 0.006 seconds
Maximum number of seconds to run all queries: 0.024 seconds
Number of clients running queries: 1
Average number of queries per client: 0
I was trying to move several PHP files from and old REDHAT5 server to new REDHAT7 server. What we saw was that in every file a ^M character was present.
This was ok on the old server, but everything crashed on the new server.
This is how I removed this carriage-return character from every file:
First find all php files:
find . -type f -name '*.php'
then use sed to replace each character:
sed -i 's/\x0d/\n/g'
All put together:
for i in
find . -type f -name '*.php' | sed 's/\.\///g'; do echo "sed -i 's/\x0d/\n/g' " $i; done
The command above will print out the necessary commands that you can run directly:
sed -i 's/\x0d/\n/g' finnfeleskrin.php
sed -i 's/\x0d/\n/g' search_oeld.php
sed -i 's/\x0d/\n/g' litt_test.php
sed -i 's/\x0d/\n/g' finnfele.php
sed -i 's/\x0d/\n/g' manager/bibliografi.php
sed -i 's/\x0d/\n/g' manager/list.php
sed -i 's/\x0d/\n/g' manager/linklist.php
or send them to a bash script. For instance:
for i in
find . -type f -name '*.php' | sed 's/\.\///g'; do echo "sed -i 's/\x0d/\n/g' " $i; done > runme.sh; ./runme.sh