Today while working on CentOS 7, I used yum command to install some packages. But I interrupted the yum command by pressing CTRL + C from keyboard. Which lead me to this error : There are unfinished transactions remaining. You might consider running yum-complete-transaction, or “yum-complete-transaction –cleanup-only” and “yum history redo last”, first to finish…
lxml is a python library used for processing XML and HTML.In this post we will learn, how to install lxml by using pip command. We will use pip to install lxml on Ubuntu 14.04 LTS. It is important to install dependency prior using pip command to install lxml Install the dependencies. sudo apt-get install libxml2-dev…
In this post we will know about sed command to display text between two strings or keywords or words . Sed is a stream editor. A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipeline) (Definition Reference from man page of sed). Knowledge of…
In this post we are sharing tips to remove html tags by using sed command. Today, while working on migration of site from wordpress to static site, I used lots of sed command. I am sharing some sed command which are always successful for me. In html tags generally the tags are coded in this…
sed is stream line editor utility in unix operating systems.sed is a line-oriented text processing utility: it reads text, line by line, from an input stream or file, into an internal buffer called the pattern space. Each line read starts a cycle. To the pattern space, sed applies one or more operations which have been…
In this post I am sharing the trick to edit file without opening it. To achieve this task we will use vi editor. vi is very well known,popular,ultimate and awesome editor and by default available in all Unix/Linux operating system. Syntax: vi -c ‘COMMAND|wq’ /path/of/file Example: We will replace a keyword with new keyword in…
SSH, the abbreviation is Secure Shell. It is a software program use the secure shell protocol to accept connection from remote computers.SSH is TCP based protocol. By default the ssh protocol listen at port no. 22 . You can also customize the port number but always remember while changing the ssh port no. it should…
FAQ : How to set root password on Ubuntu / Debian / Linux Mint Operating system ? How may I also check , the root password is working ? Answer: Ubuntu is Debian based operating system. Whereas Linux Mint is based on Ubuntu and Debian both. Set / reset root password on Ubuntu / Debian…
In this post we will learn how to use grep command to remove commented lines. We can also use egrep command which is extended form of grep command. As a Linux System Engineer, I mostly use some of the command. Most of the time when I am busy in playing on system, I generally meet…
FAQ : How to use grep command to remove blank lines from file Answer: To remove the blank lines from file, use the given below syntax grep -v ‘^$’ /path/of/file-name In above command, -v = Invert the sense of matching, to select non-matching lines ^$ = It is regex. ^ means start with and $…
With the help of cat, sed and awk command you can read or display the file contents. Learn about the method in this article.
In this tutorial we will learn, how to use awk command to print columns from file. This tip is often used by Unix/Linux System Administrator. AWK Command Awk is one of the awesome tool for processing the rows and columns.It also has feature to search keywords/strings . Awk command is widely used by Unix/Linux users…
In rare cases, you will find sometimes we need to list users above or below particular user id. Such requirement mostly come when you are playing around users related troubleshooting. For an example, we want to list the users which are above userid 500 in Linux System. The user related information like username and user…
In this tutorial we will learn, awk command to search keyword or strings in file . We will search single as well as multiple keyword with awk Command. This is a commonly used tips by most of the System Admin. Whereas the same result you can also find by using grep command. Introduction of AWK…
This post explains about grep command to find multiple strings or keyword from file. In Linux or Unix like operating system, the grep command utility is widely used. Grep is a command-line utility for searching plain-text data sets for lines matching a regular expression. Grep was originally developed for the Unix operating system, but is…