Title: Theory / Unimportant / CS / command line / file / touch;
Tags: computer_to_instruction fromCommand fromCommandLine hasNotNewEffectReturnsMeaning some_instruction

Fla: -a
Effect: Change only the access time
Page: man
Prefix: touch file

Fla: --no-create
Effect: Do not create any files
Page: man
Prefix: touch file
Flag abbreviation: -c

Fla: --date=string
Effect: parse STRING and use it instead of current time
Page: man
Prefix: touch file
Flag abbreviation: -d

Fla: --no-dereference
Effect: affect each symbolic link instead of any referenced file (useful only on systems that can change the timestamps of a symlink)
Page: man
Prefix: touch file
Flag abbreviation: -h

Fla: -m
Effect: change only the modification time
Page: man
Prefix: touch file

Fla: --reference=file
Effect: use this file's times instead of current time
Page: man
Prefix: touch file
Flag abbreviation: -r

Fla: -t foo
Effect: use [[CC]YY]MMDDhhmm[.ss] instead of current time
Page: man
Prefix: touch file

Fla: --time=WORD
Effect: change the specified time: WORD is access, atime, or use: equivalent to -a WORD is modify or mtime: equivalent to -m
Page: man
Prefix: touch file

Fla: --help
Effect: display this help and exit
Page: man
Prefix: touch

Fla: --version
Effect: output version information and exit
Page: man
Prefix: touch

Instruction: touch file
Page: man
Effect: Change file timestamps