Results for “commands”
Small, practical examples. Search by task or narrow things down below.
Choose Bash with pipefail for build commands
Docker / Compose: SHELL changes the interpreter for subsequent shell-form instructions.
Docker / Compose✓ Tested
Redirect an entire group of commands
Bash Scripts: Brace grouping runs in the current shell and shares a single output redirection.
Bash Scripts✓ Tested
Add calendar days with GNU date
Linux Commands: Anchor date arithmetic at a fixed UTC date to avoid local daylight-saving ambiguity.
Linux Commands✓ Tested
Append a line to a practice file
Linux Commands: Append a line to a practice file using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Append a new member to an uncompressed tar
Linux Commands: Use tar -r for an existing uncompressed archive; compressed tar files cannot be appended this way.
Linux Commands✓ Tested
Append a stream to a log file
Linux Commands: Use tee -a to preserve existing log contents.
Linux Commands✓ Tested
Archive filenames safely with null delimiters
Linux Commands: Use find -print0 with tar --null to preserve spaces and embedded newlines in filenames.
Linux Commands✓ Tested
Bound a command execution time
Linux Commands: Use timeout and handle status 124 as an expected time limit.
Linux Commands✓ Tested
Branch on a command’s exit status
Linux Commands: Branch on a command’s exit status using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Branch on whether a pattern exists
Linux Commands: Use grep -q in a conditional so an ordinary no-match result is not an unhandled failure.
Linux Commands✓ Tested
Capture a command’s success-stream output
PowerShell: Assignment collects output values without requiring text redirection to a file.
PowerShell✓ Tested
Check an external process exit status explicitly
PowerShell: LASTEXITCODE reports a native child exit code independently of ordinary PowerShell cmdlet errors.
PowerShell✓ Tested