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Git repository broken after computer died
...ou to figure out what the master ref should be so you can restore it (i.e. cat the correct SHA1 into .git/refs/heads/master).
In case any object contained in that commit is genuinely corrupted you can't restore your HEAD commit unfortunately. Assuming your working tree and/or index are intact you c...
Display filename before matching line
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If you have the options -H and -n available (man grep is your friend):
$ cat file
foo
bar
foobar
$ grep -H foo file
file:foo
file:foobar
$ grep -Hn foo file
file:1:foo
file:3:foobar
Options:
-H, --with-filename
Print the file name for each match. This is the default when there is
m...
How to programmatically send a 404 response with Express/Node?
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Nowadays there's a dedicated status function for this on the response object. Just chain it in somewhere before you call send.
res.status(404) // HTTP status 404: NotFound
.send('Not found');
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How to apply shell command to each line of a command output?
... to append a random ID between 1000 and 15000, when SED matches a line. cat /logs/lfa/Modified.trace.log.20150904.pw | sed -r 's/^(.*)(\|006\|00032\|)(.*)$/echo "\1\2\3 - ID `shuf -i 999-14999 -n 1`"/e'
– sgsi
Sep 8 '15 at 21:37
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What's the best way to use R scripts on the command line (terminal)?
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Next, make it executable (on the command line):
chmod +x script.r
Invocation from command line:
./script.r world
# Hello world
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How to show the last queries executed on MySQL?
... remember to clear out your general log table when you are finished: "truncate table mysql.general_log"
– pdwalker
Oct 3 '14 at 5:06
1
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Using Python String Formatting with Lists
... need to write out a formatted string. The following doesn't work, but indicates what I'm trying to do. In this example, there are three %s tokens and the list has three entries.
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Is it possible to specify a different ssh port when using rsync?
... in the host you run rsync from, set the port in the ssh config file, ie:
cat ~/.ssh/config
Host host
Port 2222
Then rsync over ssh will talk to port 2222:
rsync -rvz --progress --remove-sent-files ./dir user@host:/path
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How do I send a file as an email attachment using Linux command line?
... makes sense for your attachment. (For this concrete example, I guess application/gzip.)
– tripleee
Apr 7 '18 at 12:32
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How to check the version of GitLab?
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cd /opt/gitlab
cat version-manifest.txt
Example:
gitlab-ctl 6.8.2-omnibus
gitlab-rails v6.8.2
Current gitlab version is 6.8.2
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