一. 文件和目錄類

1. File exist 文件已經存在

[root@oldboyedu59?~]#?mkdir???/data???/lidao?? [root@oldboyedu59?~]#?mkdir???/data???/lidao?? mkdir:?cannot?create?directory?‘/data’:?File?exists mkdir:?cannot?create?directory?‘/lidao’:?File?exists

mkdir: cannot create directory ‘/lidao’: File exists

無法 ? 創建 ? ?目錄 ? 因為這個目錄已經存在

2. No such file or directory 沒有這個文件或目錄(這個東西不存在)

沒有這個目錄:文件或路徑書寫錯誤

[root@oldboyedu59?~]#?mkdir??/oldboy [root@oldboyedu59?~]#?cd?oldboy -bash:?cd:?oldboy:?No?such?file?or?directory

mkdir命令本身問題:mkdir 命令默認只能創建1層目錄 創建多層報錯
-p解決

[root@oldboyedu59?~]#?mkdir??/data/oldboy/lidao/ mkdir:?cannot?create?directory?‘/data/oldboy/lidao/’:?No?such?file?or?directory

touch命令只能創建文件,目錄不存在則會報錯
解決:先創建目錄,再創建文件

[root@oldboyedu59?~]#?ls?/oldboy/oldboy.txt [root@oldboyedu59?~]#?touch?/oldboy/lidao/alex/oldboy.txt touch:?cannot?touch?‘/oldboy/lidao/alex/oldboy.txt’:?No?such?file?or?directory

排錯思路:
1.ls命令檢查對應的目錄是否存在?
2.目錄不存在 先創建目錄在創建文件/

3. command not found 命令找不到(沒有這個命令)

[root@oldboyedu59?~]#?mkdiy -bash:?mkdiy:?command?not?found

1.書寫錯誤
2.沒有安裝

4. invalid option ? 無效的參數(不可用的參數)

?[root@oldboyedu59?~]#?touch?-p?/oldboy/oldboy.txttouch:?invalid?option?--?'p'Try?'touch?--help'?for?more?information.

5. overwrite ?覆蓋

cp復制如果已經存在這個文件會提示是否覆蓋

[root@oldboyedu59?~]#?cp??/oldboy/oldboy.txt???/tmp/ cp:?overwrite?‘/tmp/oldboy.txt’?

6.remove regular empty file 是否刪除普通文件(空的)?

[root@oldboyedu59?~]#?rm???/oldboy/oldboy.txt rm:?remove?regular?empty?file?‘/oldboy/oldboy.txt’?

7. is a directory xxx是一個目錄

rm默認無法刪除目錄
解決:加上-r 或-rf

[root@oldboyedu59?~]#?rm?/data/ rm:?cannot?remove?‘/data/’:?Is?a?directory

vi命令中 使用vi編輯目錄也會報錯

"/oldboy"E502:?"/oldboy"?is?a?directory Press?ENTER?or?type?command?to?continue

8. descend into directory 是否進入目錄

[root@oldboyedu59?~]#?rm?-r?/data/ rm:?descend?into?directory?‘/data/’??y rm:?remove?regular?empty?file?‘/data/oldboy01.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy02.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy03.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy04.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy05.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy06.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy07.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy08.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy09.txt’??n rm:?remove?regular?empty?file?‘/data/oldboy10.txt’??n rm:?remove?directory?‘/data/’??n

9. Invalid level 無效的層數,層數必須大于0

注意參數位置，數字需要加在-L后面

[root@oldboyedu59?~]#?tree??-L?-F?2?/? tree:?Invalid?level,?must?be?greater?than?0.

10. ? Can't open file for writing 無法打開這個文件

vi中 如果目錄不存在就會提示

"/oldbyo/oldboy.txt" "/oldbyo/oldboy.txt"?E212:?Can't?open?file?for?writing Press?ENTER?or?type?command?to?continue

11.No write since last change

E37:?No?write?since?last?change?(add?!?to?override)粘包賴(你修改了內容就無法使用:q退出?需要使用:q!

12. ?xx ?column window is too narrow ?窗口只有xx列太窄了 無法完全顯示

這是w的坑 空間太小施展不開.

[root@oldboyedu60-lnb?~]#?ww:?39?column?window?is?too?narrow

二. 網絡連接類

1. 遠程連接錯誤 Connection Failed 連接失敗

使用Xshell遠程連接失敗提示,檢查端口是否開啟或正確

[c:\~]$?Connecting?to?10.0.0.200:233... Could?not?connect?to?'10.0.0.200'?(port?233):?Connection?failed.Type?`help'?to?learn?how?to?use?Xshell?prompt.

使用telnet測試端口是否打開

[c:\~]$?telnet?10.0.0.200?233? Connecting?to?10.0.0.200:233... Could?not?connect?to?'10.0.0.200'?(port?233):?Connection?failed.???#233端口沒有開啟 Type?`help'?to?learn?how?to?use?Xshell?prompt.

端口開啟

[c:\~]$?telnet?10.0.0.200?22 Connecting?to?10.0.0.200:22... Connection?established.????????????#端口開啟To?escape?to?local?shell,?press?'Ctrl+Alt+]'. SSH-2.0-OpenSSH_7.4Protocol?mismatch.Connection?closed?by?foreign?host.Disconnected?from?remote?host(10.0.0.200:22)?at?12:22:54.Type?`help'?to?learn?how?to?use?Xshell?prompt. [c:\~]$

2. yum安裝軟件故障提示 Could not resolve host無法解析主機

Could not resolve host無法解析主機
主要是系統能否上網和DNS問題.

http://mirrors.tuna.tsinghua.edu.cn/centos/7.6.1810/updates/x86_64/repodata/repomd.xml:?[Errno?14]?curl#6?-?" Could?not?resolve?host:?mirrors.tuna.tsinghua.edu.cn;?Unknown?error" Trying?other?mirror.

3.yum安裝軟件提示:Nothing to do (沒事做)

有兩種情況:
情況1:軟件已經安裝并且最新如下:

Package?tree-1.6.0-10.el7.x86_64?already?installed?and?latest?version tree軟件包已經安裝并且是最新版本 Package?2:vim-enhanced-7.4.160-5.el7.x86_64?already?installed?and?latest?version Package?1:bash-completion-2.1-6.el7.noarch?already?installed?and?latest?version Nothing?to?do

情況2:軟件名字寫錯或沒有配置yum源導致找不到這個軟件包

[root@oldboyedu60-lnb?~]#?yum?install?treea?-y Loaded?plugins:?fastestmirror Loading?mirror?speeds?from?cached?hostfile*?base:?mirror.lzu.edu.cn*?extras:?mirrors.nwsuaf.edu.cn*?updates:?mirrors.nwsuaf.edu.cn base??????????????????????????????????????????????????????????????????????????????????????????????|?3.6?kB??00:00:00????? extras????????????????????????????????????????????????????????????????????????????????????????????|?3.4?kB??00:00:00?????updates???????????????????????????????????????????????????????????????????????????????????????????|?3.4?kB??00:00:00????? No?package?treea?available.? #沒有找到叫treea的軟件包 Error:?Nothing?to?do

4. Name or service not known ?域名無法識別(無法上網）

原因1：DNS配置錯誤
原因2：Linux無法上網原因 https://www.jianshu.com/p/0bc0b596c1a0

[root@oldboyedu59?~]#?ping?baidu.com? ping:?baidu.com:?Name?or?service?not?known域名無法識別（無法將域名---->ip地址)

三. 修改系統基礎配置類

1. 重啟網卡報錯 device not present

[root@oldboyusd?~]#?systemctl?restart?network? Job?for?network.service?failed?because?the?control?process?exited?with?error?code.See?"systemctl?status?network.service"?and?"journalctl?-xe"?for?details.

查看詳細錯誤原因
·journalctl -xe·

Apr?01?15:31:05?oldboyusd.1?network[7816]:?Bringing?up?interface?etho:??ERROR?????:?[/etc/sysconfig/network-scripts/ifup-eth]?Device??does?not?seem?to?be?present,?delaying?initialization.Apr?01?15:31:05?oldboyusd.1?/etc/sysconfig/network-scripts/ifup-eth[8019]:?Device??does?not?seem?to?be?present,?delaying?initializatio

2. ?修改主機名過程中,命令行中主機名沒有變化

1# hostname命令修改主機名（臨時 重啟服務器之后失效）

[root@oldboyedu59?~]#?hostname oldboyedu59 [root@oldboyedu59?~]#?hostname?oldboyedu59-lnb

2# 修改文件內容（寫合同 ? ?永久 重啟服務器之后生效）

vim?/etc/hostname?oldboyedu59-lnb

3# 檢查

[root@oldboyedu59?~]#?hostname oldboyedu59-lnb [root@oldboyedu59?~]#?cat?/etc/hostname? oldboyedu59-lnb

命令行中的主機名部分沒有改變？

解決：重新登錄下即可（斷開連接，重新連接）

[root@oldboyedu59-lnb?~]#

轉載于:https://blog.51cto.com/xiyuxingxia/2374972

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