????1??cat ??????????????????????
????cat ????????????????????????????????????????cat????????cat ???????????????
???????磺
????de>[root@localhost ~]# cat /etc/fstabde>
?????????????????????????????????????????????????
????1.0 cat ??????
????de>cat [???] [???]...de>
???????
????-A?? --show-all ????? -vET
????-b?? --number-nonblank ????????б??
????-e ????? -vE
????-E?? --show-ends ????н???????? $
????-n?? --number ????????????б??
????-s?? --squeeze-blank ????????п???
????-t ?? -vT ???
????-T?? --show-tabs ???? ??????? ^I
????-u (??????)
????-v?? --show-nonprinting ??? ^ ?? M- ????????? LFD ?? TAB ???
????--help ???????????????
????1.1 cat ??????????????
????de>[root@localhost ~]# cat /etc/profile    ?????/etc/???μ?profile????????
????[root@localhost ~]# cat -b /etc/fstab   ?????/etc/???μ?profile??????????????н??б????к??1?????
????[root@localhost ~]# cat -n /etc/profile    ?????/etc???е?profile?????е???(????????У????б??????????
????[root@localhost ~]# cat  -E /etc/profile     ?????/etc/?μ?profile?????????????е??β??????$?????de>
????cat ?????-n ??nl???????????????????????????????????????к??
????de>[root@localhost ~]# cat -n /etc/profile
????cat ??????????????????????????????????????cat?????????????????????????
????de>[root@localhost ~]# cat /etc/fstab /etc/profilede>
????cat ??????????????????????????????|?????more ?????????????????
????de>[root@localhost ~]# cat /etc/fstab /etc/profile | morede>
????1.2 cat ???????????????????????
????cat ?д????????????????????????EOF??STOP??????
????de>[root@localhost ~]# cat >  linuxsir.org.txt  << EOF  ???????linuxsir.org.txt?????
????> ???????? cat ??????????????????????????       ????????linuxsir.org.txt????????????
????> ??????? ?????                   ????????linuxsir.org.txt????????????
????> EOF   ????????????
????[root@localhost ~]# cat linuxsir.org.txt  ???????????linuxsir.org.txt??????????
???????????? cat ??????????????????????????
??????????? ?????de>
????cat ???????????????????????????
????de>[root@localhost ~]# cat  linuxsir.txt ??????????????linuxsir.txt ?????
????I am BeiNanNanBei From LinuxSir.Org .    ?????????
???????????cat????д???
????[root@localhost ~]# cat >> linuxsir.txt << EOF   ?????????linuxsir.txt???????????
????> ????????cat?????????????????       ???????????????
????> OK??
????> OK??
????> ???? ????
????> EOF   ?????EOF?????
????[root@localhost ~]# cat linuxsir.txt  ?????????????????????????
????I am BeiNanNanBei From LinuxSir.Org .
???????????cat????д???
????????????cat?????????????????
????OK??
????OK??
???????? ????de>
????cat ????????????????????????????????У?
??????????????sir01.txt??sir02.tx??sir03.txt ?????????????￡?
????de>[root@localhost ~]# cat sir01.txt
????123456
????i am testing
????[root@localhost ~]# cat sir02.txt
????56789
????BeiNan Tested
????[root@localhost ~]# cat sir03.txt
????09876
????linuxsir.org testingde>
???????????cat ??sir01.txt??sir02.txt??sir03.txt ????????????????????????????????????????????????????????μ????sir04.txt ?С?
???????????????????????????????????????????sir04.txt????????????????????????д??sir04.txt?С??????????????????????????????????sir04.txt ????????sir04.txt????????
????de>[root@localhost ~]# cat sir01.txt sir02.txt sir03.txt > sir04.txt
????[root@localhost ~]# more sir04.txt
????123456
????i am testing
????56789
????BeiNan Tested
????09876
????linuxsir.org testingde>
????cat ?????????????????????????????????????????
????de>[root@localhost ~]# cat sir00.txt
????linuxsir.org forever
????[root@localhost ~]# cat sir01.txt sir02.txt sir03.txt >> sir00.txt
????[root@localhost ~]# cat sir00.txt
????linuxsir.org forever
????123456
????i am testing
????56789
????BeiNan Tested
????09876
????linuxsir.org testingde>
???????棺????????>??????????>>??????????ū???????????????????????