Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How to perform checksum on a folder?
Answer:
Previous article told you how perform checksum on a file. How about to perform checksum on a folder?
A simple solution is to install md5deep
# sudo apt-get install md5deep
To perform checksum on a particular folder (input),
# md5deep -l -r input
26ab0db90d72e28ad0ba1e22ee510510 input/2.txt
6d7fce9fee471194aa8b5b6e47267f03 input/3.txt
b026324c6904b2a9cb4b88d6d61c81d1 input/1.txt
That's so easy.
Reference: http://md5deep.sourceforge.net/
Convert Windows text file to UNIX format without dos2unix
Answer:
As explained in this post, conversion using dos2unix is needed to convert file edited from Windows platform.
However, a simple command also can do the same job
# cat input.pl | col -b > output.pl
Remove directory name from file path
Answer:
It is easy to use basename to remove directory name from file path
E.g.
# basename /tmp/test.txt
test.txt
# basename /tmp/test.txt .txt
test
If you supply the 2nd argument, it will remove the characters if they exist in the suffix of the input filename.
Show the system ARP cache
Answer:
Show the current content of the current ARP table
# arp
Address HWtype HWaddress Flags Mask Iface
192.168.1.5 ether 00:00:0c:07:ac:0c C eth0
Print current environment variables
Answer:
You can use the env command.
E.g.
# env
TERM=xterm
SHELL=/bin/bash
XDG_SESSION_COOKIE=ff8f5b056d8812b8bd9ecadc4b1...
...
