看到来自这篇文章生成可用命令列表以及每个命令的作用我想使用别名
find {,/usr}/{,s}bin -printf '%f\0' | xargs -0 whatis | sort | less
我认为less
或|
正在干扰,但我怎样才能让别名命令忽略导致问题的那些字符呢?
即这不起作用
alias cccc='find {,/usr}/{,s}bin -printf '%f\0' | xargs -0 whatis | sort | less'
cccc
它返回
pell0modem-manager0airserv-ng0usermod0vipw0filefrag0update-software-center0ntpdate-
debian0usbmuxd0foomatic-extract-text0cupsenable0dpkg-divert0dpkg-preconfigure0foomatic-
getpjloptions0ldattach0hplj10200bccmd0vpnc-disconnect0madwifi-
unload0cupsd0tcpd0hplj10180pppstats0service0update-icon-caches0atieventsd0hpljP15050grub-
set-default0userdel0arpd0gpsdctl0remove-shell0cpgr0winbindd0cracklib-format0update-catalog0wesside-ng0vmware-authdlauncher0aireplay-ng0install-docs0hciattach0lpc0install-menu0ck-log-system-restart0foomatic-printermap-to-gutenprint-xml0setvesablank0gconf-schemas0airmon-ng0zic0update-apt-xapian-index0pm-suspend0rebuild-
代替
[ (1) - check file types and compare values
2to3 (1) - Python2 to Python3 converter
2to3-2.7 (1) - Python2 to Python3 converter
2to3-3.2 (1) - Python2 to Python3 converter
411toppm (1) - convert Sony Mavica .411 image to ppm
7z (1) - A file archiver with highest compression ratio
7za (1) - A file archiver with highest compression ratio
a2p (1) - Awk to Perl translator
accept (2) - accept a connection on a socket
accessdb (8) - dumps the content of a man-db database in a human read...
aclocal-1.11 (1) - manual page for aclocal 1.11.6
aclocal (1) - manual page for aclocal 1.11.3
当您单独执行该命令时。
事后——补充
我还添加了另一个有用的功能,可以通过字符串查询该命令目录。
fff() {
find {,/usr}/{,s}bin -printf '%f\0' | xargs -0 whatis |& grep $1
}
因此,如果你输入该命令,fff pdf
它将显示有关 pdf 的所有相关命令,如下所示
pdfunite (1) - Portable Document Format (PDF) page merger
ps2pdf13 (1) - Convert PostScript to PDF 1.3 (Acrobat 4-and-later com...
pdftotext (1) - Portable Document Format (PDF) to text converter (vers...
ps2pdfwr (1) - Convert PostScript to PDF without specifying Compatibi...
pdfdetach (1) - Portable Document Format (PDF) document embedded file ...
ps2pdf (1) - Convert PostScript to PDF using ghostscript
ps2pdf12 (1) - Convert PostScript to PDF 1.2 (Acrobat 3-and-later com...
pdf2dsc (1) - generate a PostScript page list of a PDF document
pdfimages (1) - Portable Document Format (PDF) image extractor (versio...
pdftoppm (1) - Portable Document Format (PDF) to Portable Pixmap (PPM...
foomatic-ppdfile (1) - Generate a PPD file for a given printer/driver combo
dvipdf (1) - Convert TeX DVI file to PDF using ghostscript and dvips
qpdf (1) - PDF transformation software
pdftocairo (1) - Portable Document Format (PDF) to PNG/JPEG/PDF/PS/EPS/...
pdfseparate (1) - Portable Document Format (PDF) page extractor
pdftops (1) - Portable Document Format (PDF) to PostScript converter...
ps2pdf14 (1) - Convert PostScript to PDF 1.4 (Acrobat 5-and-later com...
pdfinfo (1) - Portable Document Format (PDF) document information ex...
pdftohtml (1) - program to convert PDF files into HTML, XML and PNG im...
pdfopt (1) - Ghostscript PDF Optimizer
pdffonts (1) - Portable Document Format (PDF) font analyzer (version ...
pdf2ps (1) - Ghostscript PDF to PostScript translator
我认为这对于了解所有可用的命令很有用
答案1
不要为更复杂的东西使用别名,而是使用 shell 函数:
function cccc() {
find {,/usr}/{,s}bin -printf '%f\0' | xargs -0 whatis | sort | less
}
请man bash
参阅理由:
有关别名定义和使用的规则有些令人困惑。Bash 总是在执行该行上的任何命令之前读取至少一整行输入。别名在读取命令时展开,而不是在执行命令时展开。因此,与另一个命令出现在同一行上的别名定义直到读取下一行输入才会生效。该行上别名定义后面的命令不受新别名的影响。执行函数时,此行为也是一个问题。别名在读取函数定义时展开,而不是在执行函数时展开,因为函数定义本身就是一个复合命令。因此,函数中定义的别名直到执行该函数后才可用。为了安全起见,请始终将别名定义放在单独的行上,并且不要在复合命令中使用别名。
答案2
\
如果用正确的字符串代码替换反斜杠,则可以正确地为其创建别名\\
。正确的别名应该是:
alias cccc="find {,/usr}/{,s}bin -printf '%f\\0' | xargs -0 whatis | sort | less"