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Python vs Bash - In which kind of tasks each one outruns the other performance-wise? [closed]
... commands in a simple way. Also Bash (not sh) have some improvements, like pipefail, so chaining is really short and expressive.
+ do not require 3rd-party programs to be installed. can be executed right away.
- god, it's full of gotchas. IFS, CDPATH.. thousands of them.
If one writing a script big...
Automatic exit from bash shell script on error [duplicate]
...et +e.
You may also want to employ all or some of the the -e -u -x and -o pipefail options like so:
set -euxo pipefail
-e exits on error, -u errors on undefined variables, and -o (for option) pipefail exits on command pipe failures. Some gotchas and workarounds are documented well here.
(*) Not...
What's the opposite of head? I want all but the first N lines of a file
... of course you can omit the filename completely and its still can act as a pipe... hmm
– t0mm13b
Aug 18 '10 at 0:48
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How do I find and view a TFS changeset by comment text?
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You can use the command line client: pipe the output of tf history to a file and then use whatever search program you prefer.
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Counter increment in Bash loop not working
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the questions was about a while with a pipe, so where a subshell is created, your answer is right but you don't use a pipe so it's not answering the question
– chrisweb
Oct 10 '18 at 14:05
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List files with certain extensions with ls and grep
...ls to a terminal (or with -C option) produces multi-column output. ls to a pipe (or with -1) has single column output. (Compare output of ls with ls | cat).
– mob
Sep 19 '09 at 7:07
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Remove duplicate lines without sorting [duplicate]
...too early. To fix this, insert a sort --reverse -k2 as the 1st sort in the pipeline: cat -n file_name | sort -rk2 | sort -uk2 | sort -nk1 | cut -f2-
– Petru Zaharia
Apr 24 '17 at 9:36
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Unix's 'ls' sort by name
Can you sort an ls listing by name?
11 Answers
11
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How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
...m Kill signal
SIGSEGV 11 Core Invalid memory reference
SIGPIPE 13 Term Broken pipe: write to pipe with no
readers
SIGALRM 14 Term Timer signal from alarm(2)
SIGTERM 15 Term Termination signal
SIGUSR1 30,10,16 ...
How can I exclude one word with grep?
...ry and pass it to second grep to filter out the 'unwanted_pattern'.
'|' - pipe will tell shell to connect the standard output of left program (grep -r 'wanted_pattern' *) to standard input of right program (grep -v 'unwanted_pattern').
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