timeoutコマンドの説明します。
説明
timeoutは、制限時間を付けてプログラムを実行するコマンドです。
使い方：timeout [ コマンド ]
読み方：タイムアウト
略：なし
具体例
＃ pingが10秒で終わることを確認する
[root@CE08PRD101 work]# timeout 10 ping google.com
PING google.com(nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e)) 56 data bytes
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=1 ttl=117 time=13.5 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=2 ttl=117 time=13.2 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=3 ttl=117 time=13.6 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=4 ttl=117 time=13.1 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=5 ttl=117 time=13.5 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=6 ttl=117 time=13.1 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=7 ttl=117 time=13.1 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=8 ttl=117 time=13.1 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=9 ttl=117 time=13.5 ms
64 bytes from nrt12s15-in-x0e.1e100.net (2404:6800:4004:807::200e): icmp_seq=10 ttl=117 time=13.5 ms