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最新推荐文章于 2025-02-16 10:14:36 发布

原创最新推荐文章于 2025-02-16 10:14:36 发布 · 214 阅读

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#网络

第三天作业

1、

[root@redhat ~]# mkdir test

[root@redhat ~]# cd test

[root@redhat test]# touch text1.txt

[root@redhat ~]# touch test/text2.txt

[root@redhat ~]# cd test

[root@redhat test]# ls

text1.txt text2.txt

[root@redhat test]# vim text1.txt

[root@redhat ~]# mkdir test2

[root@redhat test]# cp text1.txt text2.txt /root/test2

[root@redhat test2]# cp text1.txt /root/test2/text111.txt

[root@redhat test2]# ls

text111.txt text1.txt text2.txt

[root@redhat test]# rm -rf text1.txt

[root@redhat ~]# rm -rf test

2、

[root@redhat ~]# echo "This is my first time to use pipe" | tee pipe_data.txt

This is my first time to use pipe

[root@redhat ~]# more pipe_data.txt

This is my first time to use pipe

3、

[root@redhat ~]# cat -n /etc/passwd

1 root:x:0:0:root:/root:/bin/bash

2 bin:x:1:1:bin:/bin:/sbin/nologin

3 daemon:x:2:2:daemon:/sbin:/sbin/nologin

4 adm:x:3:4:adm:/var/adm:/sbin/nologin

5 lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

6 sync:x:5:0:sync:/sbin:/bin/sync

7 shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown

8 halt:x:7:0:halt:/sbin:/sbin/halt

9 mail:x:8:12:mail:/var/spool/mail:/sbin/nologin

10 operator:x:11:0:operator:/root:/sbin/nologin

11 games:x:12:100:games:/usr/games:/sbin/nologin

12 ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin

13 nobody:x:65534:65534:Kernel Overflow User:/:/sbin/nologin

14 dbus:x:81:81:System message bus:/:/sbin/nologin

15 systemd-coredump:x:999:997:systemd Core Dumper:/:/sbin/nologin

16 systemd-resolve:x:193:193:systemd Resolver:/:/sbin/nologin

17 tss:x:59:59:Account used by the trousers package to sandbox the tcsd daemon:/dev/null:/sbin/nologin

18 polkitd:x:998:996:User for polkitd:/:/sbin/nologin

19 geoclue:x:997:995:User for geoclue:/var/lib/geoclue:/sbin/nologin

20 rtkit:x:172:172:RealtimeKit:/proc:/sbin/nologin

21 pulse:x:171:171:PulseAudio System Daemon:/var/run/pulse:/sbin/nologin

22 libstoragemgmt:x:996:992:daemon account for libstoragemgmt:/var/run/lsm:/sbin/nologin

23 qemu:x:107:107:qemu user:/:/sbin/nologin

24 usbmuxd:x:113:113:usbmuxd user:/:/sbin/nologin

25 unbound:x:995:990:Unbound DNS resolver:/etc/unbound:/sbin/nologin

26 rpc:x:32:32:Rpcbind Daemon:/var/lib/rpcbind:/sbin/nologin

27 gluster:x:994:989:GlusterFS daemons:/run/gluster:/sbin/nologin

28 chrony:x:993:988::/var/lib/chrony:/sbin/nologin

29 setroubleshoot:x:992:986::/var/lib/setroubleshoot:/sbin/nologin

30 pipewire:x:991:985:PipeWire System Daemon:/var/run/pipewire:/sbin/nologin

31 saslauth:x:990:76:Saslauthd user:/run/saslauthd:/sbin/nologin

32 dnsmasq:x:984:984:Dnsmasq DHCP and DNS server:/var/lib/dnsmasq:/sbin/nologin

33 radvd:x:75:75:radvd user:/:/sbin/nologin

34 clevis:x:983:982:Clevis Decryption Framework unprivileged user:/var/cache/clevis:/sbin/nologin

35 cockpit-ws:x:982:980:User for cockpit web service:/nonexisting:/sbin/nologin

36 cockpit-wsinstance:x:981:979:User for cockpit-ws instances:/nonexisting:/sbin/nologin

37 sssd:x:980:978:User for sssd:/:/sbin/nologin

38 flatpak:x:979:977:User for flatpak system helper:/:/sbin/nologin

39 colord:x:978:976:User for colord:/var/lib/colord:/sbin/nologin

40 gdm:x:42:42::/var/lib/gdm:/sbin/nologin

41 rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin

42 gnome-initial-setup:x:977:975::/run/gnome-initial-setup/:/sbin/nologin

43 sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin

44 avahi:x:70:70:Avahi mDNS/DNS-SD Stack:/var/run/avahi-daemon:/sbin/nologin

45 rngd:x:976:974:Random Number Generator Daemon:/var/lib/rngd:/sbin/nologin

46 tcpdump:x:72:72::/:/sbin/nologin

47 redhat:x:1000:1000:redhat:/home/redhat:/bin/bash

[root@redhat ~]# [root@redhat ~]# cat /etc/passwd | more -10

root:x:0:0:root:/root:/bin/bash

bin:x:1:1:bin:/bin:/sbin/nologin

daemon:x:2:2:daemon:/sbin:/sbin/nologin

adm:x:3:4:adm:/var/adm:/sbin/nologin

lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

sync:x:5:0:sync:/sbin:/bin/sync

shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown

halt:x:7:0:halt:/sbin:/sbin/halt

mail:x:8:12:mail:/var/spool/mail:/sbin/nologin

operator:x:11:0:operator:/root:/sbin/nologin

[root@redhat ~]# head -5 /etc/passwd

root:x:0:0:root:/root:/bin/bash

bin:x:1:1:bin:/bin:/sbin/nologin

daemon:x:2:2:daemon:/sbin:/sbin/nologin

adm:x:3:4:adm:/var/adm:/sbin/nologin

lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

[root@redhat ~]#

[root@redhat ~]# tail -5 /etc/passwd

sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin

avahi:x:70:70:Avahi mDNS/DNS-SD Stack:/var/run/avahi-daemon:/sbin/nologin

rngd:x:976:974:Random Number Generator Daemon:/var/lib/rngd:/sbin/nologin

tcpdump:x:72:72::/:/sbin/nologin

redhat:x:1000:1000:redhat:/home/redhat:/bin/bash