In Emacs, how to print the name of the current file that I am editing?
The built-in function buffer-file-name gives the full path of your file.
To get the file name:
M-: buffer-file-name
Creating file-backed virtual block device (VBD) for Xen virtual machines and installing Fedora 12 in Xen DomU via internet will be introduced. Note that this tutorial is based on a pretty old OS (Fedora 12). But the method here is still valid while some minor details may need to be changed for latest Xen and…
We have a running HDFS cluster. Currently, the NameNode metadata data directory has only one directory configured in hdfs-site.xml: <property> <name>dfs.namenode.name.dir</name> <value>file:///home/hadoop/hdfs/</value> <description>NameNode directory for namespace and transaction logs storage.</description> </property> We would like to add a new directory for dfs.namenode.name.dir to make replicas of the metadata on a separated disk for higher data reliability….
R is good at analyzing data. Many data are provided as JSON from RESTful APIs with an URL. R natively support many data format. For JSON, we can use some libraries. For reading JSON from URL, we can use the “jsonlite” package. In this example, we use an example of fetching BTC prices of last…
How to balance the two columns of text on the last page of a Latex doc? 2 good Latex packages are good at balancing the two columns of text on the last page of a Latex doc (choose either one that are good for you). balance Usage: At the beginning of the doc: usepackage{balance} At…
It is common that the root disk space is not enough when running a Virtual Machine in the cloud such as Amazon Web Service (AWS). The cloud storage usually provides tools or facilities to enlarge a virtual disk size. However, to make the Linux recognize and and use the enlarged disks without rebooting the OS,…
sshfs is a nice tool. But it seems there is no support to it in a newly installed CentOS 7 Linux system: Not installed by default: # sshfs -bash: sshfs: command not found Seems not available from the repositories # yum install sshfs -y Loaded plugins: fastestmirror Repodata is over 2 weeks old. Install yum-cron?…