大约有 36,000 项符合查询结果（耗时：0.0210秒） [XML]
Working with huge files in VIM
...LPART using your favourite editor.
Combine the file:
(head -n 3 HUGEFILE; cat SMALLPART; sed -e '1,5d' HUGEFILE) > HUGEFILE.new
i.e: pick all the lines before the edited lines from the HUGEFILE (which in this case is the top 3 lines), combine it with the edited lines (in this case lines 4 an...
Commenting in a Bash script inside a multiline command
...ble to put comment lines in between your commands
# output MYSQLDUMP file
cat ${MYSQLDUMP} | \
# simplify the line
sed '/created_at/d' | \
# create some newlines
tr ",;" "\n" | \
# use some sed magic
sed -e 's/[asbi]:[0-9]*[:]*//g' -e '/^[{}]/d' -e 's/""//g' -e '/^"{/d' | \
# more magic
sed -n -e '...
Looping through the content of a file in Bash
...nto this while loop, so the 'read' command has something to consume." My "cat" method is similar, sending the output of a command into the while block for consumption by 'read', too, only it launches another program to get the work done.
– Warren Young
Oct 5 '...
Running multiple commands with xargs
...
cat a.txt | xargs -d $'\n' sh -c 'for arg do command1 "$arg"; command2 "$arg"; ...; done' _
...or, without a Useless Use Of cat:
<a.txt xargs -d $'\n' sh -c 'for arg do command1 "$arg"; command2 "$arg"; ...; done' _
...
How can I write a heredoc to a file in Bash script?
...s an example which will write the contents to a file at /tmp/yourfilehere
cat << EOF > /tmp/yourfilehere
These contents will be written to the file.
This line is indented.
EOF
Note that the final 'EOF' (The LimitString) should not have any whitespace in front of the word, because...
Sort a text file by line length including spaces
...
Answer
cat testfile | awk '{ print length, $0 }' | sort -n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" "...
How to ignore whitespace in a regular expression subject string?
...hes using a regular expression pattern? For example, if my search is for "cats", I would want "c ats" or "ca ts" to match. I can't strip out the whitespace beforehand because I need to find the begin and end index of the match (including any whitespace) in order to highlight that match and any w...
Merge and interleave two arrays in Ruby
...
[ "a", "b" ].concat( ["c", "d"] ) #=> [ "a", "b", "c", "d" ]
– Leo Romanovsky
Oct 4 '12 at 4:41
31
...
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...ich I asked a long time ago, what you may want to use is popen:
os.popen('cat /etc/services').read()
From the docs for Python 3.6,
This is implemented using subprocess.Popen; see that class’s
documentation for more powerful ways to manage and communicate with
subprocesses.
Here's t...
How to write multiple line string using Bash with variables?
...o) is wrong.
Correct would be:
#!/bin/bash
kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
...
EOL
cat /etc/myconfig.conf
This construction is referred to as a Here Document and can be found in the Bash man pages und...