Results for “command substitution”
Small, practical examples. Search by task or narrow things down below.
Count repeated lines after sorting
Linux Commands: Group identical lines before uniq -c, then normalize its leading padding.
Linux Commands✓ Tested
Count whitespace-separated words
Linux Commands: Use wc -w with standard input to omit the filename column.
Linux Commands✓ Tested
Create a practice directory
Linux Commands: Create a practice directory using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Create a second name for the same file
Linux Commands: Use ln for a hard link and inspect the shared link count.
Linux Commands✓ Tested
Create an archive from an explicit file list
Linux Commands: Use tar -T for a controlled list of relative archive members.
Linux Commands✓ Tested
Create an empty file
Linux Commands: Use touch to create a file when absent; an existing file keeps its contents but gets updated timestamps.
Linux Commands✓ Tested
Create an empty practice file
Linux Commands: Create an empty practice file using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Create private files with a restrictive umask
Linux Commands: Apply umask in a subshell so the surrounding shell is unaffected.
Linux Commands✓ Tested
Define a one-off Compose service
Describe an image and command in a reusable YAML file.
Compose✓ Tested
Encode and decode a file with Base64
Linux Commands: Use GNU base64 for text transport of bytes and --decode for the reverse operation.
Linux Commands✓ Tested
Enter and leave a practice directory
Linux Commands: Enter and leave a practice directory using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Exclude a directory from a recursive search
Linux Commands: Use prune to avoid descending into generated dependencies.
Linux Commands✓ Tested