Snippet Collections

This code checks if exactly 2 arguments are provided to a script. If not, it prints "Expecting 2 arguments" and exits with a status code of 1. This demonstrates argument validation in a Bash script.

This code uses the `tr` command to delete the characters `e` and `l` from the string `Hello`, resulting in the output `Ho`. This demonstrates how to remove specific characters from a string using `tr`.

This code demonstrates the use of the `tr` command in Bash to transform text case. The first command converts the string "Hello" to uppercase, resulting in "HELLO". The second command converts the same string to lowercase, resulting in "hello". This showcases how to manipulate text case using `tr`.

The `tr` command is used to translate or delete characters. In the first example, `tr 'el' 'x'` replaces all occurrences of 'e' and 'l' with 'x', resulting in "Hxxxo". In the second example, `tr 'el' 'ay'` replaces 'e' with 'a' and 'l' with 'y', resulting in "Hayyo". This demonstrates character translation in Bash.

This code demonstrates different ways to concatenate and print strings in Bash. It shows examples using direct concatenation, variable interpolation within double quotes, and string appending with the `+=` operator. The output for all methods is "Hello, world!". This illustrates various string manipulation techniques in Bash.

Extract the directory path from a given file path using the `dirname` command. This command returns the parent directory of the specified file, which in this case is `/My/path/to`. This demonstrates how to retrieve the directory portion of a file path in Bash.

Extract the filename `file.txt` from the given path `/My/path/to/file.txt` using the `basename` command. This demonstrates how to isolate the file name from a full path in Bash.

Export the `mydata` variable to the environment, making it available to child processes. This demonstrates how to make a variable accessible globally in a Bash session.

Remove the directory named `temp_results` using the `rmdir` command. This command is used to delete empty directories in Bash.

Move all `.csv` files in the current directory to the `data/` directory. This demonstrates using the `mv` command to relocate files matching a specific pattern.

Rename the file `sales.csv` to `sales-2023.csv` using the `mv` command. This demonstrates basic file renaming in Bash.

Move the file `sales.csv` to the `data` directory and rename it to `sales-2023.csv`. This demonstrates file renaming and moving in Bash.

Copy all `.csv` files from the current directory to the `data/` directory. This demonstrates a simple file operation in Bash.

Execute a Bash script with the `-x` option to enable debugging mode, which prints each command and its arguments as they are executed. This is useful for troubleshooting and understanding the flow of a script.

Execute a Bash command that prints "bash is executed" to the console. This demonstrates running a simple inline Bash command in a new Bash shell.

Start a new Bash shell session without loading the user's `.bashrc` file. This is useful for running a clean environment or troubleshooting issues related to the `.bashrc` configuration.

Convert the first character of the variable `Var` to lowercase. This demonstrates parameter expansion in Bash to modify the case of a string.

This snippet capitalizes the first letter of the value stored in the variable `Var`. It demonstrates the use of parameter expansion in Bash to modify the case of a string.

Replace spaces in filenames with underscores in the current directory. This snippet iterates over all files with spaces in their names and renames them by replacing spaces with underscores. This demonstrates filename manipulation in Bash.

This snippet demonstrates piping both the standard output (`stdout`) and standard error (`stderr`) of `COMMAND_1` to `COMMAND_2` using the `|&` operator in Bash. This is useful for capturing and processing both output streams in a single pipeline.