一 標準輸入輸出

  二 輸出重定向

  三 實戰 [[email protected] local]# ifconfig > cs.log [[email protected] local]# cat cs.log enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.0.106 netmask 255.255.255.0 broadcast 192.168.0.255 inet6 fe80::a00:27ff:fe01:3653 prefixlen 64 scopeid 0x20<link> ether 08:00:27:01:36:53 txqueuelen 1000 (Ethernet) RX packets 4085 bytes 330891 (323.1 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2503 bytes 427391 (417.3 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 0 (Local Loopback) RX packets 4 bytes 344 (344.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4 bytes 344 (344.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:1b:2a:d5 txqueuelen 0 (Ethernet) 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 [

[email protected] local]# [[email protected] local]# ls bin cs.log etc games go include jdk1.8.0_111 jdk-8u111-linux-x64.tar.gz lib lib64 libexec sbin share src [[email protected] local]# ls > cs.log [[email protected] local]# cat cs.log bin cs.log etc games go include jdk1.8.0_111 jdk-8u111-linux-x64.tar.gz lib lib64 libexec sbin share src [

[email protected] local]# ls >> cs.log [[email protected] local]# cat cs.log bin cs.log etc games go include jdk1.8.0_111 jdk-8u111-linux-x64.tar.gz lib lib64 libexec sbin share src bin cs.log etc games go include jdk1.8.0_111 jdk-8u111-linux-x64.tar.gz lib lib64 libexec sbin share src [

[email protected] local]# datac 2>test.log [[email protected] local]# cat test.log bash: datac: command not found... [[email protected] local]# datac 2 > test.log bash: datac: command not found... 四 正確輸出和錯誤輸出同時儲存

  五 實戰 [[email protected] local]# date >test2.log 2>&1 [[email protected] local]# cat test2.log Sat Jul 15 16:05:00 CST 2017 [[email protected] local]# datetime >test2.log 2>&1 [[email protected] local]# cat test2.log bash: datetime: command not found... [[email protected] local]# date &>>test3.log [[email protected] local]# cat test3.log Sat Jul 15 16:07:01 CST 2017 [[email protected] local]# datetime &>>test3.log [[email protected] local]# cat test3.log Sat Jul 15 16:07:01 CST 2017 bash: datetime: command not found... [[email protected] local]# ls &>/dev/null [[email protected] local]# cat xdy>>access.log 2>>error.log [[email protected] local]# cat error.log cat: xdy: No such file or directory [[email protected] local]# cat test3.log>>access.log 2>>error.log [[email protected] local]# cat access.log Sat Jul 15 16:07:01 CST 2017 bash: datetime: command not found... 六 wc命令 wc [選項] [檔名] 選項： -c：統計位元組數 -w：統計單詞數 -l：統計行數 七 輸入重定向 命令<把檔案作為命令的輸入 命令<<識別符號 ... 識別符號 把兩個識別符號之間的內容作為輸入 八 實戰 [[email protected] local]# wc rere tr uyu yt tyty 5 5 21 [[email protected] local]# wc < access.log 2 11 66 [[email protected] local]# wc access.log 2 11 66 access.log [[email protected] local]# wc << ddy > erwr > erwtrt trer > werertrt tre > rertr > ddy 4 6 36