How to disable visual mode on mouse select for vim
If selecting text with the mouse in vi enters visual mode, it can cause copy-and-paste problems. To prevent visual mode, create or edit vi ~/.vimrc and add set…
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11 articles on this topic
How to convert string to lower case
There are several ways to convert uppercase strings to lowercase in Bash: tr, awk, Bash 4.0 expansion, or Perl.
How to get a day before current time in Bash
Use date with -d in Bash to display yesterday's date or an earlier date.
How to trim space from bash variable
A small Bash shell tip: remove trailing spaces, leading spaces, or both from a variable with sed.
How to count blank lines and non-blank lines in a file
Shell techniques for counting blank and nonblank lines in a file, useful in scripts and troubleshooting.
How to redirect stdout and stderr to log file
How to redirect standard output and standard error to a log file. Correct syntax: command > /path/to/log 2>&1. This redirects stdout to the log and stderr to stdout.
If / else statements on bash script
An overview of if/else statements in Bash scripts and comparison conditions. Basic if syntax: if [ condition ] then ... fi.
How to fix "unary operator expected error" in bash script
If testing a shell script produces [: =: unary operator expected error, check the if condition on the reported line to see whether the variable has a value and whether the code…
How to extract a single file / directory from tar archive
On UNIX or Linux, you can extract selected files or directories from a tarball without first extracting everything. This is more convenient and saves space…
How to redirect stderr and stdout to a file
Managing output is a common task in Linux. Commands often redirect errors and output to files so they can be stored and inspected later, especially commands…
Disable the auto complete feature of the BASH shell
One advantage of Bash is auto-completion, which saves typing every character of a command or filename. This article covers two ways to disable it…