Results for “command substitution”
Small, practical examples. Search by task or narrow things down below.
Format a zero-padded numeric label
Linux Commands: Use printf formatting instead of concatenating a variable number of zeroes.
Linux Commands✓ Tested
Generate a stepped sequence
Linux Commands: Use seq when a command pipeline needs a numeric sequence.
Linux Commands✓ Tested
Handle a filename that begins with a dash
Linux Commands: Use -- to terminate command options before an unusual filename.
Linux Commands✓ Tested
Identify whether a name resolves to a builtin
Bash Scripts: type -t reports the command kind without printing a machine-specific path.
Bash Scripts✓ Tested
Inspect a URI through typed properties
PowerShell: The Uri class separates URL components without manual string splitting.
PowerShell✓ Tested
Inspect bytes as hexadecimal values
Linux Commands: Use od with explicit formatting and no address column.
Linux Commands✓ Tested
Join lines from two files side by side
Linux Commands: Use paste to pair lines by position with a chosen separator.
Linux Commands✓ Tested
Join two sorted files by a shared key
Linux Commands: Use join for sorted, simple delimiter-separated records with one row per key.
Linux Commands✓ Tested
Keep spaces inside one argument
Linux Commands: Keep spaces inside one argument using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Limit a search to the immediate directory
Linux Commands: Use maxdepth with type f to exclude nested files and directories.
Linux Commands✓ Tested
List files containing a match
Linux Commands: Use grep -l when only the matching filenames are needed.
Linux Commands✓ Tested
Make a script executable by its owner
Linux Commands: Add the owner execute bit without replacing all permission bits.
Linux Commands✓ Tested