求两者之间的差别

rongpmcu

回复 10# Shell_HAT
我觉得如果有重复的行，那这个就会有问题了 呵呵
   

Shell_HAT

回复 11# rongpmcu


    详细说说是什么问题

rongpmcu

回复 12# Shell_HAT

你给出的命令我理解的是：每次读后面的文件一行，然后用前面文件里面的文本当模式依次去匹配那一行， 如果文本a的里面有aaaa字串，那么文本b的任何地方有aaaa字串都会匹配
   

Shell_HAT

回复 13# rongpmcu


    那么，你的试验结果呢？

jomenxiao

test: line 5: syntax error near unexpected token `('
test: line 5: `grep -vxFf <(echo ${a} |sed 's/ /\n/g') <(echo ${b} |sed 's/ /\n/g')'


终端下没问题
但是我换到脚本里就不行了
求大侠解释？
回复 10# Shell_HAT


   

jason680

回复 1# jomenxiao

How about this

$ echo -e "$a\n$b" | awk '{for(n=0;n++<NF;){if(NR==1)a[$n]=1;else if($n in a)printf $n" "}}END{print""}'
autofs_ldap_auth config conman dhcp6c dnsmasq esd gpm-root grub gssapi_mech host idmapd initlog jwhois krb5 ldap ld ld lftp libaudit libuser logrotate ltrace man mcelog mke2fs mke4fs modprobe mtools multipath nscd nsswitch ntp oddjobd oddjobd pam_smb prelink prelink reader reader redis_cache_2 redis_persistent_2 redis_persistent_2 request-key resolv rsyncd scsi_id sestatus smartd sysconfig syslog warnquota xinetd yp

   

rongpmcu

回复 14# Shell_HAT


   我没有找到好的比对方法，呵呵  

Shell_HAT

回复 15# jomenxiao

1. #!/bin/bash
   
2. a="autofs_ldap_auth config conman dhcp6c dnsmasq esd gcof gpm-root grub gssapi_mech host   test idmapd initlog jwhois krb5 ldap ld ld lftp libaudit libuser logrotate ltrace man mcelog mke2fs mke4fs modprobe mtools multipath nscd nsswitch ntp oddjobd oddjobd pam_smb prelink prelink reader reader redis_cache_2 redis_persistent_2 redis_persistent_2 request-key resolv rsyncd scsi_id sestatus smartd sysconfig sytl syslog td updtedb warnquota xinetd yp yum"
   
3. b="autofs_ldap_auth config conman dhcp6c dnsmasq esd gconf gpm-root grub gssapi_mech host idmapd initlog jwhois krb5 ldap ld ld lftp libaudit libuser logrotate ltrace man mcelog mke2fs mke4fs modprobe mtools multipath nscd nsswitch ntp oddjobd oddjobd pam_smb prelink prelink reader reader redis_cache_2 redis_persistent_2 redis_persistent_2 request-key resolv rsyncd scsi_id sestatus  join  smartd sysconfig sysctl syslog tcsd updab warnquota xinetd yp yu"
   
4. grep -vxFf <(echo ${a} |sed 's/ /\n/g') <(echo ${b} |sed 's/ /\n/g')'

复制代码

1. ./test.sh

复制代码

jomenxiao

谢谢大侠的细心帮忙

应该是我的习惯导致的问题吧？


[root@localhost tmp]# ll test
-rw-r--r-- 1 root root 108 Dec 19 14:17 test
[root@localhost tmp]# cat test

a="1 2 43 6 a d c"
b="1 3 43 6 c g k"
grep -vxFf <(echo ${a} |sed 's/ /\n/g') <(echo ${b} |sed 's/ /\n/g')
[root@localhost tmp]# sh test
test: line 4: syntax error near unexpected token `('
test: line 4: `grep -vxFf <(echo ${a} |sed 's/ /\n/g') <(echo ${b} |sed 's/ /\n/g')'
[root@localhost tmp]# chmod +x test
[root@localhost tmp]# sh test
test: line 4: syntax error near unexpected token `('
test: line 4: `grep -vxFf <(echo ${a} |sed 's/ /\n/g') <(echo ${b} |sed 's/ /\n/g')'
[root@localhost tmp]# ./test
3
g
k


回复 18# Shell_HAT


   

yezj2004

终于看完了~~~