linux下提示bash:command not found
作者：佚名
字体：[ ] 来源：互联网 时间：06-01 15:49:33
新安装的linux系统，如果进行精简安装可能会出现bash:command not found 的提示，大家在安装的时候可以选择默认安装basic的组件，一般即可。到时候可以再升级。
如果新装的系统，运行一些很正常的诸如：shutdown，fdisk的命令时，悍然提示：bash:command not found。那么 首先就要考虑root 的$PATH里是否已经包含了这些环境变量。 主要是这四个：/bin ,/usr/bin,/sbin,/usr/sbin。 四个主要存放的东东： ./bin: bin为binary的简写主要放置一些系统的必备执行档例如:cat、cp、chmod df、dmesg、gzip、kill、ls、mkdir、more、mount、rm、su、tar等。 /usr/bin: 主要放置一些应用软体工具的必备执行档例如c++、g++、gcc、chdrv、diff、dig、du、eject、elm、free、gnome*、 gzip、htpasswd、kfm、ktop、last、less、locale、m4、make、man、mcopy、ncftp、 newaliases、nslookup passwd、quota、smb*、wget等。 /sbin: 主要放置一些系统管理的必备程式例如:cfdisk、dhcpcd、dump、e2fsck、fdisk、halt、ifconfig、ifup、 ifdown、init、insmod、lilo、lsmod、mke2fs、modprobe、quotacheck、reboot、rmmod、 runlevel、shutdown等。 /usr/sbin: 放置一些网路管理的必备程式例如:dhcpd、httpd、imap、in.*d、inetd、lpd、named、netconfig、nmbd、samba、sendmail、squid、swap、tcpd、tcpdump等。 可以在家目录下查看.bash_profile里的PATH。如果是：PATH=$PATH:$HOME/bin则需要添加成如下： PATH=$PATH:$HOME/bin:/sbin:/usr/bin:/usr/sbin今天在虚拟机上安装了CentOS5.5，发现运行一些很正常的诸如：init，shutdown，fdisk 等命令时，悍然提示： bash: xx command not found。 那么，首先就要考虑root 的$PATH里是否已经包含了这些环境变量（可能是我安装的时候选择了&最小安装&，导致一些功能没开启）。 主要是这四个：/bin , /usr/bin, /sbin, /usr/sbin。
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