Linux 最佳实践 读书总结

1> 使用CDPATH设置 cd 命令的工作目录
[ramesh@dev-db ~]# pwd 
/home/ramesh 
[ramesh@dev-db ~]# cd mail 
-bash: cd: mail: No such file or directory 
[注意：在当前目录下寻找MAIL目录] 
[ramesh@dev-db ~]# export CDPATH=/etc 
[ramesh@dev-db ~]# cd mail /etc/mail 
[注意：这是在/etc下寻找MAIL目录] 
[ramesh@dev-db /etc/mail]# pwd 
/etc/mail 
想要这个设置永久生效, 把export CDPATH=/etc 添加到你的.bash_profile中。
2> 使用cd 别名(alias)来更有效的返回上层目录
# mkdir -p /tmp/very/long/directory/structure/that/is/too/deep 
# cd /tmp/very/long/directory/structure/that/is/too/deep 
# pwd /tmp/very/long/directory/structure/that/is/too/deep 
# cd ../../../../
添加如下
alias cd1="cd .." 
alias cd2="cd ../.." 
alias cd3="cd ../../.." 
alias cd4="cd ../../../.." 
alias cd5="cd ../../../../.."
到你的.bash_profile中后，就可以如下回到上层/上上层/上上上层目录了  :)
# cd /tmp/very/long/directory/structure/that/is/too/deep
# cd4
# pwd
/tmp/very/long/directory/structure/