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Top Forums UNIX for Dummies Questions & Answers How to grep for first entry in a file? Post 302919593 by RudiC on Thursday 2nd of October 2014 11:04:41 AM
Old 10-02-2014
The grep -m option may be of some interest:
Quote:
-m NUM, --max-count=NUM
Stop reading a file after NUM matching lines. If the input is standard input from a regular file, and NUM matching lines are output, grep ensures that the standard input is positioned to just after the last matching line before exiting, regardless of the presence of trailing context lines. This enables a calling process to resume a search. When grep stops after NUM matching lines, it outputs any trailing context lines. When the -c or --count option is also used, grep does not output a count greater than NUM. When the -v or --invert-match option is also used, grep stops after outputting NUM non-matching lines.
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TRACEROUTE(1)                                                      User Commands                                                     TRACEROUTE(1)

NAME
traceroute - Trace the route to a host SYNOPSIS
traceroute [OPTION...] HOST DESCRIPTION
Print the route packets trace to network host. -f, --first-hop=NUM Set initial hop distance, that is the time-to-live. -g, --gateways=GATES List of gateways for loose source routing. -I, --icmp Use ICMP ECHO as probe. -m, --max-hop=NUM Set maximal hop count (default is 64). -M, --type=METHOD Use METHOD (icmp or udp) for traceroute operations, defaulting to udp. -p, --port=PORT Use destination PORT port (default is 33434). -q, --tries=NUM Send NUM probe packets per hop (default is 3). --resolve-hostnames Resolve hostnames. -t, --tos=NUM Set type of service (TOS) to NUM. -w, --wait=NUM Wait NUM seconds for response (default is 3). -?, --help Give this help list. --usage Give a short usage message. -V, --version Print program version. GNU inetutils 2015-05-15 TRACEROUTE(1)
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