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Get first Git commit hash

https://git.kernel.org/cgit/git/git.git/commit/?id=ad5aeeded3295589b2573b143f754762a56f8f82
This is sample output - yours may be different.
2

git rev-list --max-parents=0 HEAD

lkraider · 2014-02-10 20:39:08 8
Get first Git commit hash

git log --format=%H | tail -1 doesn't work anymore Show Sample Output
This is sample output - yours may be different.
```
<hash>
```
1

git log --pretty=format:%H | tail -1

unixmonkey6264 · 2010-08-17 13:47:42 4
Get a Bulleted List of SVN Commits By a User for a Specifc Day (Daily Work Log)

* Replace USERNAME with the desired svn username * Replace the first YYYY-MM-DD with the date you want to get the log (this starts at the midnight event that starts this date) * Replace the second YYYY-MM-DD with the date after you want to get the log (this will end the log scan on midnight of the previous day) Example, if I want the log for December 10, 2010, I would put {2010-12-10}:{2010-12-11} Show Sample Output
This is sample output - yours may be different.
```
$ svn log -r '{2010-12-10}:{2010-12-11}' | sed -n '1p; 2,/^-/d; /antic/,/^-/p' | grep -E -v '^(r[0-9]|---|$)' | sed 's/^/* /g'
* Commit message 5
* Commit message 4
* Commit message 3
```
1

svn log -r '{YYYY-MM-DD}:{YYYY-MM-DD}' | sed -n '1p; 2,/^-/d; /USERNAME/,/^-/p' | grep -E -v '^(r[0-9]|---|$)' | sed 's/^/* /g'

antic · 2010-12-22 17:52:19 6
Show the total number of changes that every user committed to a Subversion repository

This saves Subversion's log output as XML and then runs an XQuery over it. This is standard XQuery 1.0 and should therefore also work with other XQuery processors. I have tested it with Zorba (http://www.zorba-xquery.com). XQilla (http://xqilla.sourceforge.net) also does it, but you'd have to save the query to a file and then execute "xqilla filename.xq". The query first finds all distinct authors and then, for each author, sums up the number of paths they have changed in each commit. This accounts for commits of multiple changes at once. The indenting space in all lines from the second one seems to be due to a bug in Zorba. Show Sample Output
This is sample output - yours may be different.
```
username1 137
 username2 384
 username3 65
```
1

svn log -v --xml > log.xml; zorba -q 'let $log := doc("log.xml")/log/logentry return for $author in distinct-values($log/author) order by $author return concat($author, " ", sum(count($log[author=$author]/paths/path)), "
")' --serialize-text

langec · 2013-03-22 11:17:10 5
Number of commits per day in a git repository
This is sample output - yours may be different.
1

git log | grep Date | awk '{print " : "$4" "$3" "$6}' | uniq -c

La0 · 2013-03-27 14:37:32 5
Get first Git commit hash

Can anyone make a shorter one? This doesn't work: git log --reverse -1 --format=%H Show Sample Output
This is sample output - yours may be different.
```
c7a4ef6756568cbb795481b82cebea72926a2ab5
```
0

git log --format=%H | tail -1

l0b0 · 2010-07-20 08:12:05 14
list lines changed per all authors of a git repository
This is sample output - yours may be different.
0

for i in $(git log --format='%ae' | sort -u); do echo $i; git log --author="$i" --pretty=tformat: --numstat | awk '{ add += $1; subs += $2; loc += $1 - $2 } END { printf "added lines: %s, removed lines: %s, total lines: %s\n", add, subs, loc }' - done

flavioab · 2016-01-27 20:46:51 11

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Add a DNS server on the fly

Since systemd-resolved was implemented, add a DNS server have become weirder and harder than before. With this command, you can add a DNS server on-the-fly tied to an specific interface

Find the date of the first commit in a git repository

Finds the date of the first commit in a git repository branch

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Print all open regular files sorted by the number of file handles open to each.

This command run fine on my Ubuntu machine, but on Red Hat I had to change the awk command to `awk '{print $10}'`.

Relocate a file or directory, but keep it accessible on the old location throug a simlink.

Used for moving stuff around on a fileserver

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Does a traceroute. Lookup and display the network or AS names and AS numbers.

From the man page. lft ? display the route packets take to a network host/socket using one of several layer-4 protocols and methods; optionally show heuristic network information in transitu -A Enable lookup and display of of AS (autonomous system) numbers (e.g., [1]). This option queries one of several whois servers (see options 'C' and 'r') in order to ascertain the origin ASN of the IP address in question. By default, LFT uses the pWhoIs service whose ASN data tends to be more accurate and more timely than using the RADB as it is derived from the Internet's global routing table. -N Enable lookup and display of network or AS names (e.g., [GNTY-NETBLK-4]). This option queries Prefix WhoIs, RIPE NCC, or the RADB (as requested). In the case of Prefix WhoIs or RADB, the network name is displayed. In the case of RIPE NCC, the AS name is displayed.

Limit memory usage per script/program

When I'm testing some scripts or programs, they end up using more memory than anticipated. In that case, computer nearly halts due to swap space usage, and sometimes I have to press Magic SysRq+REISUB to reboot. So, I was looking for a way to limit memory usage per script and found out that ulimit can limit memory. If you run it this way: $ $ ulimit -v 1000000 . $ $ scriptname Then the new memory limit will be valid for that shell. I think changing the limit within a subshell is much more flexible and it won't interfere with your current shell ulimit settings. note: -v 1000000 corresponds to approximately 1GB of RAM

Bash scripts encryption and passphrase-protection

This function will encrypt a bash script and will only execute it after providing the passphrase. Requires mcrypt to be installed on the system.

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Commands tagged commit (7)

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