Get the number of files in a directory
How to the number of files in a directory
ls | wc -l
works well for me.
http://stackoverflow.com/questions/3702104/find-the-number-of-files-in-a-directory
How to the number of files in a directory
ls | wc -l
works well for me.
http://stackoverflow.com/questions/3702104/find-the-number-of-files-in-a-directory
How to find which hard drives a LVM volume uses to decide which volume will be affected if a disk failes. You can use lvdisplay with the –maps option to display the the mapping of logical extents to physical volumes and physical extents: # lvdisplay –maps To map physical extents to logical extents, use #…
It is painful for a Linux user to use the OCaml toplevel without the readline features. Is there a method to enable/add these kinds of features in readline to the OCaml toplevel? I find 2 options that work very well for me: utop provides a beautiful interface and supports completion, colors, parenthesis matching, etc. It…
On a x86-64 64 bit Linux system, sometimes we may want to use the 32 bit Firefox, although the support to 64 bit Firefox is getting much better. Just for needed ones, this post introduces how to install 32 bit Firefox on 64 bit Linux (Fedora as the example). Install 32-bit firefox First, install firfox.i686…
WordPress is so missed for many great features and plugins. Hence, we moved the site back to the WordPress system on Jul. 12, 2013. MediaWiki is great but, for this site, WordPress is a better solution. The so missed features of WordPress Related posts via the YARPP Plugin. URLs without strongly mapped to the title…
ECDSA keys are commonly used in various areas like blockchains. OpenSSL is a commonly used tools in Linux for handling signature/encryption/decryption. This post introduces how to generate ECDSA keys using OpenSSL in Linux. Generate keys for K1 secp256k1 elliptic curve We start with K1 (secp256k1) as the example. To generae ECDSA keys using other curves,…
A related question: how to find the replication factors of files in a HDFS cluster? method 1: You can use the HDFS command line to ls the file. The second column of the output will show the replication factor of the file. For example, $ hdfs dfs -ls /usr/GroupStorage/data1/out.txt -rw-r–r– 3 hadoop zma 11906625598 2014-10-22…