Command output redirect to file and terminal

Question

I am trying to throw command output to file plus console also  This is because i want to keep record of output in file  I am doing following and it appending to file but not printing ls output on terminal     ls 2 gt  amp 1  gt   tmp ls txt

User · Answer

In case somebody needs to append the output and not overriding  it is possible to use  -a  or  --append  option of  tee  command    ls 2 gt  amp 1   tee -a  tmp ls txt ls 2 gt  amp 1   tee --append  tmp ls txt

User · Answer

It is worth mentioning that 2  amp 1 means that standard error will be redirected too  together with standard output  So  someCommand   tee someFile   gives you just the standard output in the file  but not the standard error  standard error will appear in console only  To get standard error in the file too  you can use  someCommand 2 gt  amp 1   tee someFile    source  In the shell  what is  quot  2 gt  amp 1  quot      Finally  both the above commands will truncate the file and start clear  If you use a sequence of commands  you may want to get output amp error of all of them  one after another  In this case you can use -a flag to  tee  command   someCommand 2 gt  amp 1   tee -a someFile

User · Answer

Yes  if you redirect the output  it won t appear on the console  Use tee   ls 2 gt  amp 1   tee  tmp ls txt

[linux] Command output redirect to file and terminal

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