Command alias inLinuxis another (mostly short) version of frequently used command (or command with arguments). It is meant for lessening keystrokes to type long commands and making it fast, easy, and accurate to work in shell. On the other hand, if you want users to use some commands wi...
19.alias Thealiascommand enables you to substitute a small or more familiar name in place of a long string. Example:Tailor theducommand to use 1K units. # alias du=du -k 20.echo Theechocommand echoes a string variable to standard output. Example:Report backHello World. # echo Hello Worl...
4,Delete a file rm f1delete a file permanently,Use this command carefully - there is no Undo!! rm –i f1ask your confirm before you delete a file. in practice, you can add alias from rm to rm –i in your .bashrc file 5,Change file’s mode(who can operate on the file) chmod p...
If you’re making Bash programs for you or for others to use one way you can get user input is to specify arguments for users to provide to your program, as we discussed in the previous section. You could also ask users to type in a string on the command line by temporarily stopping ...
. filename [arguments] source filename [arguments] …… alias [-p] [name[=value] ...] …… 也可使用help命令,可以以若干种方式显示builtin说明书也中的信息。 help[-s] [command...] $ help -s pwd help pwd: pwd [-LP] help: help [-dms] [pattern ...] ...
FreeBSD does not enable DMA on ATAPI drives by default. DMA is enabled with the sysctl command and the arguments below, or with /boot/loader.conf with the following entries: hw.ata.ata_dma="1" hw.ata.atapi_dma="1" Useburncdwith an ATAPI device (burncdis part of the base system) ...
Notice how I used the ll command. This is not a standard command, but an alias for ls -al. In a shell, you can define aliases that are shortcuts to common command and arguments combinations.PermissionsI mentioned permissions briefly before, when introduced the ls -al command....
基本UNIX命令说明书
alias-tips - An oh-my-zsh plugin to help remembering those aliases you defined once. allclear - Clears the terminal when you cd into $HOME. allergen - A collection of custom ZSH plugins to use with Antigen. almostontop - Clears previous command output every time before new command executed...
Aliases are customized or modified commands in Linux shell which are used in the place of the original commands. We can create an alias for the ls command this waySyntax $ alias="ls -l" What this does is that it tells the system to execute thels -lcommand instead of thelscommand. Be...