Several useful unix command shortcuts

Several useful unix command shortcuts 1 .! $ Bash or zsh indicates the last parameter of the previous command, for example, here! $ Indicates file-B, so you can easily view the file content of file-B; [java] $ cpfile-afile-B $ vim! $2. grep-ri-r represents... several useful unix command shortcuts 1 .! $ Bash or zsh indicates the last parameter of the previous command, for example, here! $ Indicates file-B, so you can easily view the file content of file-B; [java] $ cp file-a file-B $ vim! $2. grep-ri-r indicates recursive search, searches in all subdirectories, and I indicates case sensitivity; for example, we can replace $ grep */* with grep-r 3.cd. This will return the last Directory [java] [/usr/share/fonts/dejavu]. $ cd/var/log [/var/log] $ cd-/usr/share/fonts/dejavu [/usr/share/fonts/dejavu] $4. reverse I-search if you press ctrl + R in the command line window, you can search for previous commands and re-execute them. alise command alias, which can be used to simplify the alias of commonly used long commands [java] alias vipuppet = 'CD ~ /Projects/puppet; mvim .'