[root@localhost etc]# lls && echo yes || echo no bash: lls: command not found... Similar command is: 'ls' no [root@localhost etc]# cd /usr/src [root@localhost src]# ls debug kernels [root@localhost src]# ls && echo yes || echo no debug kernels yes [root@localhost src]# lls && echo yes || echo no bash: lls: command not found... Similar command is: 'ls' no [root@localhost src]#