Results for “command substitution”
Small, practical examples. Search by task or narrow things down below.
Exclude generated files from an archive
Linux Commands: Place exclude options before the input paths to control archive membership.
Linux Commands✓ Tested
Exclude matching lines
Linux Commands: Use grep -v to retain lines that do not start with a comment marker.
Linux Commands✓ Tested
Extract a delimited text column
Linux Commands: Use cut for simple unquoted delimiter-separated text.
Linux Commands✓ Tested
Extract a field from simple delimited text
Linux Commands: Extract a field from simple delimited text using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Extract a filename from a path
Linux Commands: Use basename with an explicit suffix when removing a known extension.
Linux Commands✓ Tested
Extract a parent directory from a path
Linux Commands: Use dirname without needing the path to exist.
Linux Commands✓ Tested
Filter lines by literal text
Linux Commands: Filter lines by literal text using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Find empty regular files
Linux Commands: Use the empty predicate with a file type constraint.
Linux Commands✓ Tested
Find files larger than a byte threshold
Linux Commands: Use the c suffix for exact byte units with GNU find size tests.
Linux Commands✓ Tested
Find lines common to two sorted files
Linux Commands: Use comm -12 to suppress the two columns of unmatched lines.
Linux Commands✓ Tested
Find lines unique to the first sorted file
Linux Commands: Use comm -23 to retain only records absent from the second input.
Linux Commands✓ Tested
Format a known UTC timestamp
Linux Commands: Use GNU date -u and an explicit input offset to avoid local timezone dependence.
Linux Commands✓ Tested