Useful use of cat(1)
in-ulm.de
Useful use of cat(1)
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Re: Useful use of cat(1)
#2You may also create new empty files by saying `touch filename`. This saves three keystrokes (which includes an annoying `>` symbol, requiring the shift key) as compared to the aforementioned `cat` method!
Re: Useful use of cat(1)
#3 cat > file vs. touch file
cat file | cmd vs. cmd Re: Useful use of cat(1)
#4You may also create new empty files by saying `touch filename`. This saves three keystrokes (which includes an annoying `>` symbol, requiring the shift key) as compared to the aforementioned `cat` method!
Or, at least when running Bash (possibly sh, didn't try), just
>foo
Re: Useful use of cat(1)
#5Instead of using a cat with heredoc, just type
cat - | grep "something"
Re: Useful use of cat(1)
#6You may also create new empty files by saying `touch filename`. This saves three keystrokes (which includes an annoying `>` symbol, requiring the shift key) as compared to the aforementioned `cat` method!
what do you mean? "cat > file" allows you to create simple text file not just empty files. As long as you don't need advanced editing, it is the quickest way to do it (well I think).
Re: Useful use of cat(1)
#7Don't forget "tac" - the reverse of "cat".
Re: Useful use of cat(1)
#8You may also create new empty files by saying `touch filename`. This saves three keystrokes (which includes an annoying `>` symbol, requiring the shift key) as compared to the aforementioned `cat` method!
Or, at least when running Bash (possibly sh, didn't try), just >foo also works to create file "foo".
That does not work, but
:>foo
Re: Useful use of cat(1)
#9cat > file vs. touch file cat file | cmd vs. cmd So even some of the thing listed are still not the best use case for cat
| cat > file vs. touch file
With 'cat > file' you can actually type in the file's contents (then press ^d to finish). 'touch file' merely creates an empty file. (Not that I think 'cat > file' is much faster than 'vi file')
Re: Useful use of cat(1)
#10ps has a nasty habit of truncating its output. Piping it into cat is a way around this. E.G.
$ echo $COLUMNS
118
$ ps -fp 14706
UID PID PPID C STIME TTY TIME CMD
root 14706 14705 0 Jan29 pts/3 00:00:00 sudo -p [local sudo] Password: python /usr/lib/sshuttle/main.py pytho
$ ps -fp 14706 | cat
UID PID PPID C STIME TTY TIME CMD
root 14706 14705 0 Jan29 pts/3 00:00:00 sudo -p [local sudo] Password: python /usr/lib/sshuttle/main.py python -v --firewall 12300 0