tee命令

tee - read from standard input and write to standard output and files

SYNOPSIS
   tee [OPTION]... [FILE]...

DESCRIPTION
   Copy standard input to each FILE, and also to standard output.

   -a, --append
          append to the given FILEs, do not overwrite

   -i, --ignore-interrupts
          ignore interrupt signals

   --help display this help and exit

   --version
          output version information and exit
 

EXAMPLE:

ifconfig | tee hello.txt

ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.66.134  netmask 255.255.255.0  broadcast 192.168.66.255
        inet6 fe80::c41b:5c61:4ec8:22f5  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:bb:c9:ad  txqueuelen 1000  (Ethernet
 
)
        RX packets 2570  bytes 192977 (188.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 914  bytes 265414 (259.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 :
 
:1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

cat hello.txt

ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.66.134  netmask 255.255.255.0  broadcast 192.168.66.255
        inet6 fe80::c41b:5c61:4ec8:22f5  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:bb:c9:ad  txqueuelen 1000  (Ethernet)
        RX packets 2570  bytes 192977 (188.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 914  bytes 265414 (259.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

實現了終端與檔案的輸出