In this article, we’ll go through the command-line tools grep, sed, and awk. In particular, we’ll study the differences in functionality among them. 2. Background When it comes to text processing in Linux, the three tools that come in pretty handy are grep, sed, and awk. Although ...
1) What is the difference between awk and sed ? Both are tools that transform text. BUT awk can do more things besides just manipulating text. Its a programming language by itself with most of the things you learn in programming, like arrays, loops, if/else flow control etc You can "pr...
In an earlier article, we have explained to you thedifference between sudo and su commandsin Linux. These are two important commands used to implement security in Linux, in regards to user management policy and user permissions. Thesucommand is used to switch to another user, in other words ...
If the number of commands, user is supposed to run is under10, we can place all the commands alongside, with white space in between them, as shown below: mark beta.database_server.com=(cat) /usr/bin/command1 /usr/sbin/command2 /usr/sbin/command3 ... If this list of command varies...
This is a key difference between su and sudo. Su switches you to the root user account and requires the root account's password. Sudo runs a single command with root privileges -- it doesn't switch to the root user or require a separate root user password. ...
For finding difference between two versions of a file on Linux, you can use any one of the 4 tools explained in this article — diff, colordiff, wdiff, and vimdiff. The screenshots provided for these tools shows the difference between the following two empfile1.txt and empfile2.txt. ...
The diff command output can get little confusing to read when you diff two files that has lot of differences. Wouldn’t it be nice to view the file differences visually? vimdiff utility gives a better visual feeling of differences between files as explai
Normally, tocompare two files in Linux, we use thediff– a simple and original Unix command-line tool that shows you the difference between two computer files; compares files line by line and it is easy to use, comes with pre-installed on most if not all Linux distributions. ...
Above highlighted are the differences between‘grep’,‘egrep’and‘fgrep’. Apart from difference in the set of regular expressions used, and speed of execution, rest command line parameters remain same for all the three versions of grep and even instead of “egrep” or “fgrep”, “grep -...
Key Difference Between Localhost and 127.0.0.1 Whilelocalhostand127.0.0.1ultimately refer to the same thing (your own machine), there are a few differences between them: Format: localhostis a hostname. 127.0.0.1is an IP address. Usage: