Linked Questions
29 questions linked to/from How to trick a command into thinking its output is going to a terminal
27
votes
1
answer
10k
views
Make program in a pipe think it has tty [duplicate]
Test environment:
$ mkdir testdir
$ cd testdir
$ echo | tee "file
name"
Now, ls will print file?name (under Ubuntu GNU bash, at least), while ls | cat will print file and name in separate lines.
...
- 1,318
2
votes
1
answer
2k
views
Preserve systemctl colors while redirecting to a file [duplicate]
My Linux server is running SystemD (RHEL/CentOS/Debian/Ubuntu...).
I would like to redirect the output of systemctl list-dependencies to a file, but I want to preserve the ANSI colors (red or green ...
- 3,141
4
votes
0
answers
745
views
filter journalctl output, preserve color [duplicate]
I am using journalctl to watch the system by journalctl -f -p 4, but I'd like to grep-out some information.
This works: journalctl -f -p 4|grep -v "maximal mount", but grep discards any color info, a ...
- 203
1
vote
0
answers
419
views
How to redirect color output to a file? [duplicate]
echo -e "SUCCESS=$(tput setaf 1)$(tput setab 7)FALSE$(tput sgr 0) Share=$DIR1 \
LastCheckedDate=$(date +%Y_%m_%d_%H:%M:%S)" >> $ERROR_LOG
In error log I am ...
- 25
1
vote
1
answer
182
views
How can I convert terminal output? [duplicate]
I want to convert all output to the terminal that a certain command generates, using some filter program. How can I achieve this?
The immediate answer might be, “Use a pipeline”. However, too many ...
- 111
1
vote
0
answers
79
views
Make any program "think" its output is a terminal (ie stop it from "knowing" its output is a pipe/file/substitution/etc) to keep ansi-color-codes etc [duplicate]
EDIT:
specifically what worked for me was using the python script in this answer
and I gave the tweaks I used to get it working for my autoloading functions in fishshell, and on ubuntu 20.04, in this ...
- 186
0
votes
0
answers
30
views
How to bypass pipe detection? [duplicate]
A question at stackoverflow has answers that show the following way of detecting if standard output is a pipe:
if [ -t 1 ] ; then echo terminal; else echo "not a terminal"; fi
The -t flag ...
- 428
36
votes
4
answers
20k
views
Why does sudo ignore aliases?
I am running Ubuntu 10.04 and I use upstart for daemon management. My enterprise application is run as a daemon and must be run as root because of various privileges. E.g.:
sudo start my-...
- 12.8k
22
votes
3
answers
5k
views
grep doesn't output until EOF if piped through cat
Given this minimal example
( echo "LINE 1" ; sleep 1 ; echo "LINE 2" ; )
it outputs LINE 1 and then, after one second, outputs LINE 2, as expected.
If we pipe this to grep LINE
( echo "LINE 1" ; ...
- 323
21
votes
3
answers
3k
views
How does a program decide whether or not to have coloured output?
When I execute a command from a terminal that prints coloured output (such as ls or gcc), the coloured output is printed. From my understanding, the process is actually outputting ANSI escape codes, ...
- 467
15
votes
1
answer
16k
views
Systemd Python service not sending all output to syslog
I have a custom service and have explicitly called for all stdout & stderr to be sent to syslog in the config file, however only some of the output appears in both syslog and the journal (they are ...
- 498
5
votes
3
answers
3k
views
use line buffering when piping output to file
I have a perl program that prints to stdout, which I then pipe into a file, like this:
./skript.pl > file.txt 2>&1
This makes the output of that skript buffer. However, I would like to be ...
- 695
5
votes
2
answers
3k
views
show escape sequences in terminal?
Is there a way to let the terminal show the raw escape sequence? (e.g. those used to control color)
I came across this UNIX.SE question, and want to filter "red" output ( Filter output of command by ...
- 1,086
2
votes
2
answers
6k
views
How to stdin with tee or other kind of pipes or redirection of outputs? [closed]
Let's say I want to see the output what a command does, such as apt-get. However, if I would run a command redirecting the output such as
apt-get install some-application -y > apt_out.txt
or
apt-...
- 1,033
3
votes
2
answers
3k
views
How to make any program work with the tee command?
I wrote a program (in Ruby) and it worked well. It prints out a few lines of text and then pause for a minute and then repeats the above.
It works well (in Mac OS X's terminal), but I noted that if I ...
- 3,319