What's the difference between lineman and linkman?

Lineman

Definition:

(n.) One who carries the line in surveying, etc.
(n.) A man employed to examine the rails of a railroad to see if they are in good condition; also, a man employed to repair telegraph lines.

Example Sentences:

(1) A ferocious interior lineman who has drawn comparison with Houston's JJ Watt, Floyd will help compensate for the departure of seven-time Pro Bowler Richard Seymour.
(2) - Baltimore already had a tough task ahead of them against a Cincinnati team that has put up 40+ points in each of its last four home games, and life got a little bit more difficult this morning when it was confirmed that defensive lineman Arthur Jones would not play, after failing to pass the league’s mandated concussion protocol following the injury he suffered last week against New England.
(3) Frederick has good pedigree, he is the 15th offensive lineman to be drafted out of Wisconsin since 2000.
(4) An investigation conducted for the NFL determined Incognito and two other offensive linemen engaged in persistent harassment of tackle Jonathan Martin , another offensive lineman and an assistant trainer.
(5) The Miami Herald, indeed, claimed that the canteen table stunt had been pulled on at least one other Dolphins lineman in recent days – suggesting that it was not designed specifically to humiliate Martin.
(6) Big news,” the offensive lineman tweeted as news of the trade broke.
(7) I think that goes for almost every defensive lineman," he says.
(8) 10.07pm GMT Injuries Defensive lineman Mike Neal (knee) joins cornerback Sam Shields in the locker room.
(9) Chance Warmack , offensive guard, Alabama 2.20am BST Titans on the clock... 2.20am BST This was the trade made a few minutes ago by the Rams 2.18am BST No.9 The New York Jets pick... Dee Milliner , cornerback, Alabama (At least they avoided adding yet another quarterback) 2.13am BST Paolo's verdict on Tavon Austin Paolo says: And there you have it – the first non-lineman selected in this year’s draft is West Virginia’s Tavon Austin.
(10) We can also see the appeal of a Magnetic Man album arranged like a dubstep version of BEF's 1982 project Music of Quality and Distinction , where the boffin-techno bods behind Heaven 17 produced everyone from Tina Turner to Sandie Shaw on a series of radical reinterpretations of classics such as Suspicious Minds and Wichita Lineman.
(11) Miami Dolphins offensive lineman Jonathan Martin twice considered suicide during a sustained campaign of harassment from teammates, an NFL independent commission’s report has revealed.
(12) ESPN reported that he had sent his fellow offensive lineman a number of threatening phone messages over the last two years, including one voicemail in which he allegedly called the then rookie a “half-nigger piece of shit” .
(13) Someone is going to take a chance on him, and though Ansah enjoyed more success as a down lineman during his last year in college, there is no reason why he can't eventually be effective rushing the passer from a two-point stance.
(14) Caring’s stake in BHS was held via two British Virgin Islands based entities, Dar Jenna and Lineman Holdings, which meant his involvement, while widely rumoured in the fashion industry, was only confirmed by the Guardian last year by leaks from HSBC’s Swiss private bank.
(15) Less than one month away from the start of the NFL season, the San Francisco 49ers' rookie defensive lineman has poor technique, minimal experience and only a modest grasp of the game's strategic element.
(16) He was a football player, an offensive lineman with a reputation for confronting anyone lined up across him.
(17) Carolina Panthers: Star Lotulelei, defensive tackle, Utah Lotulelei is what a lot of analysts will refer to as a "space-eater" – a big guy who does his best work lined up opposite a specific offensive lineman, controlling the gaps either side of that player.
(18) Although treatment alleviated the shoulder symptoms at low-level activities, the patient was unable to successfully compete under the extreme demands of an American football lineman.
(19) Carson recalled that one of his Giants teammates, offensive lineman Roy Simmons, was suspected as being gay and was never ostracized.
(20) Lotulelei is what a lot of analysts will refer to as a “space-eater” – a big guy who does his best work lined up opposite a specific offensive lineman, controlling the gaps either side of that player – rather than seeking to penetrate and make plays in the backfield as Richardson might do.