Update docs about installing on linux
Update docs about installing on linux

ZacharyRSmith/docs,arashbi/docs,yurrriq/docs,rchavarria/docs,alexclarkofficial/docs,ekse/exercism-docs,lfex/exercism-docs,NobbZ/docs,k4rtik/docs,alexclarkofficial/docs,k4rtik/docs,ekse/exercism-docs,exercism/DEPRECATED.help.exercism.io,yurrriq/docs,canweriotnow/docs,arashbi/docs,exercism/DEPRECATED.help.exercism.io,lfex/exercism-docs,ZacharyRSmith/docs,spazm/docs,spazm/docs,NobbZ/docs,rchavarria/docs,canweriotnow/docs