课堂记录问题总结班

1、问题：问题 1：d not found 命令找不到 没有这个命令rootyy nihaodiao# cd-bash: cd:d not foundrootlinux-39-01 data# pws-bash: pws:d not found问题 2：No such file or directory 没有这个目录或文件 你要找的东西不存在rootoldbayedu-39 tmp# cd /data-bash: cd: /data: No such file or directoryrootoldboyedu-39 data# cd /date-bash: cd: /date: No such

2、file or directory rootoldboyedu-39 data# ls /datels: cannot acs /date: No such file or directoryrootoldboyedu-39 data# ls /bindataetcliblost+foundmntprocsbinsrvtmpvarbootdevhomelib64mediaoptrootselinuxsysusr问题 3：is not a directory 这不是目录rootoldboyedu39 /# cp /data/oldboy.txt/data/oldboy.txt .bakcp:.b

3、ak is not a directory问题 4：rootoldboyedu-39 # cp /data/oldboy.txt /data/oldboy.txt.bakcp: overwrite /data/oldboy.txt.bak?问题 5：rootoldboy39 # aliasalias rm=do not use rmrootoldboy39 # rm /tmp/test.txt-bash: syntax error near unexpected token do rootoldboy39 #问题=必须是一个命令问题 6：rootoldboyedu-3901 # alias r

4、m =echo do not use rmalias rm=rm -i-bash: alias: =echo do not use rm: not found rootoldboyedu-3901 # aliasalias cp=cp -ialias l.=ls -d .* -color=auto alias ll=ls -l -color=auto alias ls=ls -color=auto alias mv=mv -ialias rm=rm -ialias which=alias | /usr/bin/which -tty-only -read-alias -show-dot -sho

5、w-tilde rootoldboyedu-3901 # rm /tmp/test.txtrm: remove regular empty file /tmp/test.txt? 问题问题 7：#1.ERROR Couldnt resolve host mirrorlist.centos. rootoldboyedu-39 oldboy# yum install tree -yLoaded plugins: fastestmirror, securitySetting up Install ProsLoading mirror speeds from cached hostfileCouldn

6、otretrievemirrorlisterror wasError: Cannot find a valid14: PYCURL ERROR 6 - Couldnt resolve host mirrorlist.centos.baseurl for repo: base#连接拍错的过程xs、crt 无法连接到服务器#服务器无法上网linux 无法上网或联网怎么办？/3388056/1940340#yum 常见错误resolv.conf#1.ERROR Couldnt resolve host mirrorlist.centos.错误 无法/主机 mirrorlist.centos.无法与这

7、个连接无法上网#验证你是否能上网#1.不通，ip 地址通了， 说明你的 DNS 配置有#2.问题#3.修改 dns 修改网卡的配置文件cat /etc/sysconfig/network-scripts/ifcfg-eth0=0+ 前一个字符连续出现了 1 次或多次=1问题 16问题rootoldboyedu-39 oldboy# ifconfig eth0 |sed -n 2p|sed s#.*dr:#g |sed s#Bc.*$#gsed: -e expres#1, char 9: unterminated sdrootoldboyedu-39-nb # ifconfig eth0|awk

8、 NR=2|sed s#.*dr:#g|sed s#Bc.*$#grootoldboyedu-39-nb # ifconfig eth0 |sed -n 2p|sed s#.*dr:#g |sed s#Bc.*$#g00问题 17rootoldboyedu-39 data# ifconfig eth0|sed -n 2s#:# #gp|awk pr老师 这个为什么$3 就是 IP 地址了$3 $5 $NFrootchaocheng # ifconfig eth0 |awk NR=2|awk -F prinet这个为什么不切割最前面的空格$1问题 18rootlainanhai-39 # ifc

9、onfig eth0 |awk NR=2|awk -F :+ 0055都连一起拉 咋分开pr$4 $6 $8问题 19问题： rootoldboyedu-Misong_VM # date +%F %w date: extra operand %wTry date -help for more information.我如果想显示空格的话会报错，这个咋办？rootoldboyedu-39-nb # #显示日期 格式 :2017-07-30_0年-月-日_ rootoldboyedu-39-nb # date +%F_%w2017-07-30_0rootoldboyedu-39-nb # date

10、 +%F %w date: extra operand %wTry date -help for more information.rootoldboyedu-39-nb # date +%F %w 2017-07-30 0问题 20 useradd: user oldboy already existsrootoldboyedu # useradd oldboy-g incahomeuseradd: user oldboy already existsrootoldboyedu # usermod -g incahome oldgirlusermod: no changes问题 21：tar 打包报错8 组组长-rootoldboyedu-39 scripts# tar zcf xiaolo.$(date +%F-%T).tar.gz /etctar: Removing leading / from member namestar (child): Cannot connect to xiaolo.2017-08-09-10: resolve failed问题 22:rootoldboyedu-39 # sh /server/scrip